Mycoplasma pneumoniae(M.pneumoniae)is a common pathogen that causes community-acquired pneumonia in children.The clinical presentation of this pathogen can range from mild self-limiting illness to severe and refractor...Mycoplasma pneumoniae(M.pneumoniae)is a common pathogen that causes community-acquired pneumonia in children.The clinical presentation of this pathogen can range from mild self-limiting illness to severe and refractory cases.Complications may occur,such as necrotizing pneumonia and respiratory failure.Extrapulmonary complications,including encephalitis,myocarditis,nephritis,hepatitis,or even multiple organ failure,can also arise.In this editorial,we dis-cuss the clinical implications of the significant findings from the article"Serum inflammatory markers in children with M.pneumoniae pneumonia and their predictive value for mycoplasma severity"published by Wang et al.They reported that measuring lactic dehydrogenase,interleukin-6 levels,and D-dimer effectively predicts refractory M.pneumoniae pneumonia cases.展开更多
Background: Mycoplasma pneumoniae (MP) is the primary causative agent of community-acquired pneumonia, which has increasingly become resistant to macrolides, complicating treatment regimens, especially with the co-inf...Background: Mycoplasma pneumoniae (MP) is the primary causative agent of community-acquired pneumonia, which has increasingly become resistant to macrolides, complicating treatment regimens, especially with the co-infection factor. Its worldwide prevalence has fluctuated due to the influence of the COVID-19 pandemic. The study investigated co-infection patterns in children diagnosed with Mycoplasma pneumoniae pneumonia (MPP). Methods: From June 2022 to December 2023, we retrospectively analyzed the clinical data for hospitalized children with Mycoplasma pneumoniae pneumonia in Wuhan, China. We collected data on age, sex, clinical information, and pathogenic results. We also collected sputum or bronchoalveolar lavage fluid (BALF) samples to test respiratory pathogens and macrolide resistance using targeted microbial next-generation sequencing (tNGS). We analyzed the data using SPSS. Results: The study involved 417 patients diagnosed with MPP, of whom 86.33% had co-infections. Co-infections were notably linked to lobar pneumonia, prominent imaging shadows and higher macrolide resistance rate. Key bacterial pathogens were Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, rhinoviruses, and human adenoviruses (HADV). In MPP cases, Candida albicans was the fungal pathogen related to co-infections. The co-infection with HADV and human bocavirus 1 (HBoV1) correlated with prolonged fever, whereas Bordetella pertussis was linked to prolonged cough. In contrast, Candida albicans exhibited a weaker association with diffuse large-area infiltration on chest imaging, and its co-infection was less likely to result in severe disease. Conclusion: These results offer valuable insight into Mycoplasma pneumoniae pneumonia in children, highlighting the impact of co-infections on the disease’s clinical outcomes.展开更多
Objective: To investigate the expression and diagnostic value of D-dimer, CRP, and IL-6 in children with Mycoplasma pneumonia. Methods: A total of 100 children diagnosed with Mycoplasma pneumonia from the pediatric de...Objective: To investigate the expression and diagnostic value of D-dimer, CRP, and IL-6 in children with Mycoplasma pneumonia. Methods: A total of 100 children diagnosed with Mycoplasma pneumonia from the pediatric department of the First Affiliated Hospital of Shaoyang University, admitted between November 2023 and June 2024, were selected for the study. According to the severity of the condition, they were divided into two groups: a mild group (50 cases) and a severe group (50 cases). After treatment, they were further divided into an effective group (63 cases) and a non-effective group (37 cases) based on the treatment outcomes, to compare their diagnostic values. Results: The levels of D-dimer, CRP, IL-6, length of hospital stay, fever resolution time, cough resolution time, and the time for lung rales to disappear were higher in the severe group than in the mild group (P < 0.05). The levels of D-dimer, CRP, and IL-6 in the non-effective group were higher than those in the effective group (P < 0.05). In this study, using pathological results as the “gold standard,” it was found that the positive detection rate for the combined detection of D-dimer, CRP, and IL-6 was higher than the detection rate for each of D-dimer, CRP, and IL-6 alone, suggesting that the combined diagnosis had a higher positive detection rate (P < 0.05). Compared with D-dimer, CRP, and IL-6, the combined sensitivity, specificity, and accuracy were all higher (P < 0.05). Conclusion: D-dimer, CRP, and IL-6 are closely related to Mycoplasma pneumonia in children and can serve as auxiliary diagnostic tools for Mycoplasma pneumonia in children, offering significant value.展开更多
Objective:To analyse the clinical characteristics of Mycoplasma pneumoniae pneumonia(MPP)in children under two years of age.Methods:A retrospective analysis was conducted on 112 paediatric cases of MPP admitted to our...Objective:To analyse the clinical characteristics of Mycoplasma pneumoniae pneumonia(MPP)in children under two years of age.Methods:A retrospective analysis was conducted on 112 paediatric cases of MPP admitted to our hospital between January 2022 and December 2023.Clinical data including symptoms,signs,imaging findings,and prognosis were collected.Results:Analysis of clinical symptom distribution revealed coughing in 100.0%of cases,comprising both paroxysmal dry cough and productive cough.Fever was present in 61.61%of cases,with additional manifestations including wheezing,vomiting,diarrhoea,and respiratory distress.Pulmonary rales were the most prevalent finding at 75.89%,alongside other signs such as diminished breath sounds.Imaging analysis of all 112 pneumonia cases revealed bronchopneumonia accounted for 70.54%of cases,representing a relatively high proportion.Treatment involved macrolide antibiotics,including azithromycin,with bronchodilators and corticosteroids added for significant wheezing.The overall treatment efficacy rate was 90.18%.Conclusion:Analysis of Mycoplasma pneumoniae characteristics in children under 2 years indicates that MPP in infants and young children under 2 presents with mild symptoms,pronounced signs,and relatively mild overall inflammation,resulting in a comparatively high overall cure rate.展开更多
Objective:To study the risk prediction model for multiple bronchoalveolar lavage in children with mycoplasma pneumoniae pneumonia(MPP).Methods:151 pediatric patients with MPP admitted in our hospital from July to Dece...Objective:To study the risk prediction model for multiple bronchoalveolar lavage in children with mycoplasma pneumoniae pneumonia(MPP).Methods:151 pediatric patients with MPP admitted in our hospital from July to December 2023 were selected,the incidence rate of multiple bronchoalveolar lavage was recorded.A logistic multivariate regression model was employed to analyze relevant factors and construct a risk prediction model for multiple bronchoalveolar lavage in children with MPP.Results:Among 151 children with MPP,64 cases underwent multiple bronchoalveolar lavage,accounting for 42.38%.The Logistic multivariate model analysis revealed that the pleural effusion,sepsis,and abnormally elevated serum levels of LDH and D-D were independent influence factors for multiple bronchoalveolar lavage in children with MPP(p<0.05),based on this,a Nomogram prediction model can be established.The ROC analysis results showed that the AUC of the model to judge the multiple bronchoalveolar lavage in MPP patients was 0.828(SE=0.035,95%CI=0.760-0.896,p<0.001),the sensitivity was 0.813 and the specificity was 0.759.Conclusion:The multiple bronchoscopic bronchoalveolar lavage in MPP patients are associated with the levels of LDH and D-D,as well as the presence of pleural effusion and sepsis complications,the risk prediction model established,which based on this has high accuracy.展开更多
Mycoplasma gallisepticum(MG) is a common avian pathogen that mainly infects poultry, causingsignificant reductions in body weight gain and egg production, along with damage to immune organs andimmunosuppression. MG is...Mycoplasma gallisepticum(MG) is a common avian pathogen that mainly infects poultry, causingsignificant reductions in body weight gain and egg production, along with damage to immune organs andimmunosuppression. MG is susceptible to co-infections with other pathogens, leading to increased mortalityrates and significant economic losses in the global poultry industry. While antibiotics have been extensivelyapplied worldwide to treat MG infections in poultry production, concerns regarding antibiotic resistanceand residue remain prevalent. Traditional Chinese medicine(TCM), renowned for its natural, safe, andnon-toxic properties, has shown significant anti-inflammatory and immune-enhancing effects. This studyaimed to investigate the protective effect of TCM on production performance and its impact on MG-inducedimmunosuppression through the MAPK/ERK/JNK signaling pathway in chickens. Our results showed that TCMalleviated the negative effects of MG infection on production performance, as evidenced by improvements inbody weight gain, feed conversion rate, survival rate, and immune organ index. TCM exhibited direct inhibitionof the MG proliferation in vitro and in vivo. Furthermore, TCM treatment promoted the normalization of tracheaand lung tissue structure in MG-infected chickens, leading to a significant reduction in inflammatory damage.Moreover, following the treatment with the TCM, the production of pro-inflammatory cytokines interleukin-1β(IL-1β) and tumor necrosis factor-α(TNF-α) decreased significantly, accompanied by the downregulation of pro-apoptotic genes caspase3, caspase9, and BAX, both in vitro and in vivo. A mechanism-based study showed that in vitro and in vivo treatment with the TCM significantly reduced the expression of key proteins, including early growth response gene 1(EGR1), p-ERK, p-JNK, and p-JUN. Altogether, TCM improved body weight gain, inhibited pro-inflammation responses, and alleviated tissue damage by inhibiting the MAPK/ERK/JNK signaling pathway to protect the performance and immune system of MG-infected chickens.展开更多
Objective:To investigate the correlation between Mycoplasma pneumoniae infection and childhood asthma,and to explore the impact of Mp infection on airway inflammation and airway hyperresponsiveness in children with as...Objective:To investigate the correlation between Mycoplasma pneumoniae infection and childhood asthma,and to explore the impact of Mp infection on airway inflammation and airway hyperresponsiveness in children with asthma.Methods:58 children with bronchopneumonia admitted to the First People’s Hospital of Jintan,Changzhou from April 2024 to October 2024 were selected as the study subjects.The levels of cytokines IL-4,IL-17,TGF-β1,and INF-γ in the serum were compared between the MP group and non-MP group,as well as between the MP wheezing group and MP nonwheezing group.Results:The levels of IL-17 and IL-4 in the MP group were significantly higher than those in the non-MP group(P<0.05),while there was no statistically significant difference in the other indicators(P>0.05).Statistically significant differences in IL-17 and IL-4 were observed between the wheezing and non-wheezing groups(P<0.05),while there was no statistically significant difference in the other indicators(P>0.05).There was a significant difference in IL-17 among the groups(P<0.05).The difference in IL-17 between the MP group and non-MP group was significant(P<0.05),and the difference between the wheezing and non-wheezing groups was marginally significant(P<0.05).Conclusion:M.pneumoniae infection may be one of the risk factors for the onset of childhood asthma,but its mechanism remains unclear.Further research is needed to determine whether Mp infection can serve as a biomarker for childhood asthma and to elucidate its underlying mechanism.展开更多
BACKGROUND Mycoplasma pneumoniae(M.pneumoniae)is considered to be one of the causative agents of community acquired pneumonia in children with general or severe course of disease.Severe M.pneumoniae pneumonia(SMPP)has...BACKGROUND Mycoplasma pneumoniae(M.pneumoniae)is considered to be one of the causative agents of community acquired pneumonia in children with general or severe course of disease.Severe M.pneumoniae pneumonia(SMPP)has emerged as a crucial global health concern due to high mortality rate in children under 5 years,potentially life-threatening complications,and growing challenges in pediatric treatment associated with rising macrolide resistance.Additionally,MPP can be complicated by other bacterial and/or viral pathogens,which may exacerbate disease severity.After the lifting of strict non-pharmaceutical interventions(NPIs)worldwide,the dramatic rise of incidence of MPP in Asia and Europe was observed.AIM To perform the comprehensive study of community acquired MPP cases registered in 2023 in Baoding Hospital,China.METHODS A total of 1160 children from 1 month to 15 years old with confirmed MPP diagnosis were enrolled in the study.The blood and respiratory samples were collected within the 24 hours after admission.The hematological parameters,biochemical markers,cytokine profiles were assessed.The respiratory samples were tested for the presence of M.pneumoniae and other 23 bacterial/viral pathogens by multiplex polymerase chain reaction(PCR).The macrolide resistance mutations(A2063G,A2064G in the 23S rRNA gene of M.pneumoniae)were determined by PCR.RESULTS Number of MPP cases has dramatically increased starting August with peak in November.SMPP and general MPP(GMPP)were identified in 264 and 896 of 1160 hospitalized children.The binary logistic regression analysis identified six[C-reactive protein(CRP),lactate dehydrogenase,procalcitonin,erythrocyte sedimentation rate,fibrin and fibrinogen degradation products(FDPs),D-dimer]and four(neutrophils,CRP,FDPs,prothrombin time)predictors of SMPP in age groups 2-5 years and 6-15 years,respectively.Children with SMPP showed significantly higher levels of cytokine interleukin(IL)-17F(2-5 years),and cytokines interferon-gamma,tumor necrosis factoralpha,IL-10(6-13 years).Concomitant viral/bacterial pathogens were determined in 24.3%and 28.0%cases of SMPP and GMPP.Among them,Streptococcus pneumoniae(S.pneumoniae)and Haemophilus influenzae(H.influenzae)were predominant.93.2%cases of MPP were associated with macrolide resistant M.pneumoniae.CONCLUSION Specific MPP epidemiological pattern associated with lifting NPIs was revealed:Increase of hospitalized cases,prevalence of S.pneumoniae and H.influenzae among concomitant pathogens,93.2%of macrolide resistant M.pneumonia.展开更多
[Objectives]This study was conducted to explore the curative effect of Qingfei Ditan decoction combined with targeted drug penetration therapy of traditional Chinese medicine on severe mycoplasma pneumonia in children...[Objectives]This study was conducted to explore the curative effect of Qingfei Ditan decoction combined with targeted drug penetration therapy of traditional Chinese medicine on severe mycoplasma pneumonia in children.[Methods]Based on the retrospective study method,children with severe mycoplasma pneumonia admitted to the Children s Hospital of Soochow University from April 2023 to October 2023 were selected,and divided into a treatment group including 56 cases and a control group including 145 cases.The curative effect and adverse reactions of the two groups were compared.[Results]The total effective rate of the treatment group was higher than that of the control group,and the disappearance time of cough and lung rales was shorter than that of the control group,and the incidence of adverse reactions was lower,showing statistical significance(P<0.05).However,defervescence time and bronchoscope flushing rate showed no significant difference(P>0.05).[Conclusions]Qingfei Ditan Decoction combined with targeted drug penetration therapy of traditional Chinese medicine has a significant effect on severe mycoplasma pneumonia in children,and can reduce the side effects of drugs.It is a safe and efficient combination treatment scheme of traditional Chinese medicine.展开更多
BACKGROUND Mycoplasma pneumoniae(MP)is a prevalent pathogen that causes respiratory infections in children and adolescents.AIM To assess the differences in the clinical features of MP-associated communityacquired pneu...BACKGROUND Mycoplasma pneumoniae(MP)is a prevalent pathogen that causes respiratory infections in children and adolescents.AIM To assess the differences in the clinical features of MP-associated communityacquired pneumonia(CAP)in children who presented with mild or severe mycoplasma pneumoniae pneumonia(MPP);to identify the incidence of myocardial damage between the two groups.METHODS This work is a retrospective study.We identified children between 2 mo and 16 years of age with clinical and radiological findings consistent with CAP.We admitted patients to the inpatient department of the Second Hospital of Jilin University,Changchun,China,from January 2019 to December 2019.RESULTS A total of 409 hospitalized patients were diagnosed with MPP.Among them were 214(52.3%)males and 195(47.7%)females.The duration of fever and cough was the longest in severe MPP cases.Similarly,plasma levels of highly sensitive Creactive protein(t=-2.834,P<0.05),alanine transaminase(t=-2.511,P<0.05),aspartate aminotransferase(t=-2.939,P<0.05),and lactate dehydrogenase(LDH)(t=-2.939,P<0.05)were all elevated in severe MPP cases compared with mild MPP cases,and these elevations were statistically significant(P<0.05).Conversely,the neutrophil percentage was significantly lower in severe MPP cases than in mild MPP cases.The incidence of myocardial damage was significantly higher in severe MPP cases than in mild MPP cases(χ^(2)=157.078,P<0.05).CONCLUSION Mycoplasma pneumoniae is the main cause of CAP.The incidence of myocardial damage was higher and statistically significant in severe MPP cases than in mild MPP cases.展开更多
Mycoplasma hyopneumoniae is an important pathogen causing Mycoplasmal pneumonia of swine, which generally causes secondary infections and mixed infections, thus seriously threats the development of swine industry and ...Mycoplasma hyopneumoniae is an important pathogen causing Mycoplasmal pneumonia of swine, which generally causes secondary infections and mixed infections, thus seriously threats the development of swine industry and resulting in huge economic losses. Using PCR technology has very important significance to the correct diagnosis of Mycoplasmal pneumonia at the early stage. In this paper, specific target genes of Mycoplasma hyopneumoniae, methods for clinical sample collection, key technical factors of DNA sample processing method, and the research progress, main advantages and disadvantages, and application of general PCR technology, multiple PCR technology, nested-PCR technology, real-time fluorescence quantitative PCR technology, gene chip detection technology and loop-mediated isothermal amplification in detection of Mycoplasma hyopneumoniae were summarized, which provided convenience for the effective diagnosis and prevention of Mycoplasmal pneumonia of swine.展开更多
[Objective] The aim was to investigate the prevalence of Mycoplasma capricolum subsp. Capripneumoniae in Qinghai Province. [Method] By using indirect hemagglutination test kit for detecting Mycoplasma capricolum subsp...[Objective] The aim was to investigate the prevalence of Mycoplasma capricolum subsp. Capripneumoniae in Qinghai Province. [Method] By using indirect hemagglutination test kit for detecting Mycoplasma capricolum subsp. Capripneumoniae,208 goat serums were detected. [Result] The positive rate of goat sera was 16.3%,and the positive rate of sera from different regions ranged from 6.7% to 24.3%. [Conclusion] The infection rate of Mycoplasma capricolum subsp. Capripneumoniae was high in Qinghai Province,so it is necessary to strengthen the prevention and control of this disease.展开更多
[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring th...[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring the minimum inhibitory concentra-tion, the in vitro antibacterial activity of golden buckwheat water extract was deter-mined; meanwhile, the therapeutic effect of golden buckwheat oral solution on my-coplasma infection was determined by artificial y infecting chickens with Mycoplasma gal isepticum culture. [Results] The golden buckwheat water extract had obvious in-hibitory effects against Pseudomonas aeruginosa and Escherichia coli, and a certain inhibitory effect on Salmonel a and Staphylococcus aureus; administration of golden buckwheat oral solution at the dose of 0.5%-1.0% continuously for 5 d had a good therapeutic effect against mycoplasma infection. [Conclusion] The study provides sci-entific bases for further study on the antibacterial activity of golden buckwheat and its application.展开更多
ObjectiveThis study was to establish a simple method for collecting and detecting Mycoplasma hyopneumoniae （Mhp） in aerosol. MethodBased on the mechanisms of liquid impinger and filtration sampler, a double concentr...ObjectiveThis study was to establish a simple method for collecting and detecting Mycoplasma hyopneumoniae （Mhp） in aerosol. MethodBased on the mechanisms of liquid impinger and filtration sampler, a double concentration aerosol sampler was designed for collecting Mhp aerosol. Firstly, the collection was performed in a closed environment full of artificial aerosol of Mhp. Secondly, collection efficiency was detected by real-time PCR. Thereafter, the clinical feasibility of the designed equipment was tested by collecting aerosol samples in different pig herds. In one assay, the samples were collected at different times from one pig house challenged with Mhp. In another assay, the samples was collected from the delivery room, nursery and fattenning house of a MPS outbreak farm as well as a Mhp infection positive pig farm without obvious clinical symptoms. All the aerosol samples were then detected by real-time PCR or nested PCR. ResultThe collection efficiency of the designed bioaerosol sampler was （37.04±6.43） %, Mhp could be detected 7 d after intratracheal challenge with pneumonic lung homogenate suspension. Aerosol samples of 11 pig houses from the two Mhp positive pig farms with or without clinical symptoms all showed a positive result of PCR, the positivity rate was 100%. ConclusionA high sensitive collecting and detecting technology of aerosol was successfully established, which can be applied to clinical detection of Mhp in aerosol.展开更多
AIM: To explore relationships between human carcinomas and mycoplasma infection. METHODS: Monoclonal antibody PD4, which specifically recognizes a distinct protein from mycoplasma hyorhinis, was used to detect mycopla...AIM: To explore relationships between human carcinomas and mycoplasma infection. METHODS: Monoclonal antibody PD4, which specifically recognizes a distinct protein from mycoplasma hyorhinis, was used to detect mycoplasma infection in different paraffin embedded carcinoma tissues with immunohistochemistry. PCR was applied to amplify the mycoplasma DNA from the positive samples for confirming immunohistochemistry. RESULTS: Fifty of 90 cases (56%) of gastric carcinoma were positive for mycoplasma hyorhinis. In other gastric diseases, the mycoplasma infection ratio was 28% (18/49) in chronic superficial gastritis, 30% (14/46) in gastric ulcer and 37% (18/49) in intestinal metaplasia. The difference is significant with gastric cancer (chi(2) = 12.06, P 【 0.05). In colon carcinoma, the mycoplasma infection ratio was 55.1% (32/58),but it was 20.9% (10/49)in adenomarous polyp (chi(2)=13.46, P 【 0.005). Gastric and colon cancers with high differentiation had a higher mycoplasma infection ratio than those with low differentiation (P 【 0.05). Mycoplasma infection in esophageal cancer, lung cancer, breast cancer and glioma was 50.9% (27/53), 52.6% (31/59), 39.7% (25/63) and 41% (38/91), respectively. The mycoplasma DNA was successfully amplified with the DNA extracted from the cancer tissues that were positive for mycoplasma infection (detected with antibody PD4). CONCLUSION: There was high correlation between mycoplasma infection and different cancers, which suggests the possibility of an association between the two. The mechanism involved in oncogenesis by mycoplasma remains unknown.展开更多
[Objective] This study aimed to investigate the secretory expression of P97R1 gene of Mycoplasma hyopneumoniae（Mhp） in Pichia pastoris expression system and the primary application; of the expression product. [Metho...[Objective] This study aimed to investigate the secretory expression of P97R1 gene of Mycoplasma hyopneumoniae（Mhp） in Pichia pastoris expression system and the primary application; of the expression product. [Method] A pair of specific primers was designed to conduct PCR according to the Mhp P97R1 gene sequence in Genbank, and the amplified P97R1 gene was cloned into the pPICZa-A yeast expression vector to construct the secretory recombinant expression vector pPICZa-A-P97R1. The plasmid pPICZa-A-p97R1 linearized by Sac I was transformed into P. pastoris GSl15 by electroporation. Positive transformant identified by PCR was incubated to express P97R1 protein after methanol induction. And the expression product was identified using SDS-PAGE and Western-blotting anal.wsis. [Result] P97R1 protein was successfully expressed in the P. pastoris system, with a secre- tory amount of 499μg/ml, and revealed good reactogenicity. Meanwhile, an indirect ELISA method was established with P97R1 protein after the optimization of each reaction factor, which showed good specificity and repeatability according to repeated tests. [Conclusion] This study provides bases for developing the ELISA Kit for anti- body detection and genetically engineered vaccine to Mhp.展开更多
The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously af...The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously affecting the quality of life of children.The selection,dosage,and course of anti-MP drugs in children with RMPP have brought a lot of troubles to pediatric hospitals.In the present study,the characteristics,usage and dosage,drug resistance mechanism,and treatment progress of anti-MP drugs for the treatment of RMPP in children were reviewed.Collectively,our findings provided ideas for the treatment of children with RMPP using anti-MP drugs.展开更多
Mycoplasmas, the smallest free-living, self-replicating bacteria with diameters of 200 to 800 nm, have been reported to be associated with human diseases. It is well known that the mycoplasma lipoprotein/peptide is ab...Mycoplasmas, the smallest free-living, self-replicating bacteria with diameters of 200 to 800 nm, have been reported to be associated with human diseases. It is well known that the mycoplasma lipoprotein/peptide is able to modulate the host immune system, whose N-terminal structure is an important factor in inducing immunity and distinguishing Toll-like receptors (TLRs). However, there is still no clear elucidation about the pathogenic mechanism of mycoplasma lipoprotein/peptide and the signaling pathway. Some researchers have focused on understanding the structures of these proteins and the relationships between their structure and biological function. This review provides an update on the research in this field.展开更多
文摘Mycoplasma pneumoniae(M.pneumoniae)is a common pathogen that causes community-acquired pneumonia in children.The clinical presentation of this pathogen can range from mild self-limiting illness to severe and refractory cases.Complications may occur,such as necrotizing pneumonia and respiratory failure.Extrapulmonary complications,including encephalitis,myocarditis,nephritis,hepatitis,or even multiple organ failure,can also arise.In this editorial,we dis-cuss the clinical implications of the significant findings from the article"Serum inflammatory markers in children with M.pneumoniae pneumonia and their predictive value for mycoplasma severity"published by Wang et al.They reported that measuring lactic dehydrogenase,interleukin-6 levels,and D-dimer effectively predicts refractory M.pneumoniae pneumonia cases.
文摘Background: Mycoplasma pneumoniae (MP) is the primary causative agent of community-acquired pneumonia, which has increasingly become resistant to macrolides, complicating treatment regimens, especially with the co-infection factor. Its worldwide prevalence has fluctuated due to the influence of the COVID-19 pandemic. The study investigated co-infection patterns in children diagnosed with Mycoplasma pneumoniae pneumonia (MPP). Methods: From June 2022 to December 2023, we retrospectively analyzed the clinical data for hospitalized children with Mycoplasma pneumoniae pneumonia in Wuhan, China. We collected data on age, sex, clinical information, and pathogenic results. We also collected sputum or bronchoalveolar lavage fluid (BALF) samples to test respiratory pathogens and macrolide resistance using targeted microbial next-generation sequencing (tNGS). We analyzed the data using SPSS. Results: The study involved 417 patients diagnosed with MPP, of whom 86.33% had co-infections. Co-infections were notably linked to lobar pneumonia, prominent imaging shadows and higher macrolide resistance rate. Key bacterial pathogens were Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, rhinoviruses, and human adenoviruses (HADV). In MPP cases, Candida albicans was the fungal pathogen related to co-infections. The co-infection with HADV and human bocavirus 1 (HBoV1) correlated with prolonged fever, whereas Bordetella pertussis was linked to prolonged cough. In contrast, Candida albicans exhibited a weaker association with diffuse large-area infiltration on chest imaging, and its co-infection was less likely to result in severe disease. Conclusion: These results offer valuable insight into Mycoplasma pneumoniae pneumonia in children, highlighting the impact of co-infections on the disease’s clinical outcomes.
文摘Objective: To investigate the expression and diagnostic value of D-dimer, CRP, and IL-6 in children with Mycoplasma pneumonia. Methods: A total of 100 children diagnosed with Mycoplasma pneumonia from the pediatric department of the First Affiliated Hospital of Shaoyang University, admitted between November 2023 and June 2024, were selected for the study. According to the severity of the condition, they were divided into two groups: a mild group (50 cases) and a severe group (50 cases). After treatment, they were further divided into an effective group (63 cases) and a non-effective group (37 cases) based on the treatment outcomes, to compare their diagnostic values. Results: The levels of D-dimer, CRP, IL-6, length of hospital stay, fever resolution time, cough resolution time, and the time for lung rales to disappear were higher in the severe group than in the mild group (P < 0.05). The levels of D-dimer, CRP, and IL-6 in the non-effective group were higher than those in the effective group (P < 0.05). In this study, using pathological results as the “gold standard,” it was found that the positive detection rate for the combined detection of D-dimer, CRP, and IL-6 was higher than the detection rate for each of D-dimer, CRP, and IL-6 alone, suggesting that the combined diagnosis had a higher positive detection rate (P < 0.05). Compared with D-dimer, CRP, and IL-6, the combined sensitivity, specificity, and accuracy were all higher (P < 0.05). Conclusion: D-dimer, CRP, and IL-6 are closely related to Mycoplasma pneumonia in children and can serve as auxiliary diagnostic tools for Mycoplasma pneumonia in children, offering significant value.
文摘Objective:To analyse the clinical characteristics of Mycoplasma pneumoniae pneumonia(MPP)in children under two years of age.Methods:A retrospective analysis was conducted on 112 paediatric cases of MPP admitted to our hospital between January 2022 and December 2023.Clinical data including symptoms,signs,imaging findings,and prognosis were collected.Results:Analysis of clinical symptom distribution revealed coughing in 100.0%of cases,comprising both paroxysmal dry cough and productive cough.Fever was present in 61.61%of cases,with additional manifestations including wheezing,vomiting,diarrhoea,and respiratory distress.Pulmonary rales were the most prevalent finding at 75.89%,alongside other signs such as diminished breath sounds.Imaging analysis of all 112 pneumonia cases revealed bronchopneumonia accounted for 70.54%of cases,representing a relatively high proportion.Treatment involved macrolide antibiotics,including azithromycin,with bronchodilators and corticosteroids added for significant wheezing.The overall treatment efficacy rate was 90.18%.Conclusion:Analysis of Mycoplasma pneumoniae characteristics in children under 2 years indicates that MPP in infants and young children under 2 presents with mild symptoms,pronounced signs,and relatively mild overall inflammation,resulting in a comparatively high overall cure rate.
文摘Objective:To study the risk prediction model for multiple bronchoalveolar lavage in children with mycoplasma pneumoniae pneumonia(MPP).Methods:151 pediatric patients with MPP admitted in our hospital from July to December 2023 were selected,the incidence rate of multiple bronchoalveolar lavage was recorded.A logistic multivariate regression model was employed to analyze relevant factors and construct a risk prediction model for multiple bronchoalveolar lavage in children with MPP.Results:Among 151 children with MPP,64 cases underwent multiple bronchoalveolar lavage,accounting for 42.38%.The Logistic multivariate model analysis revealed that the pleural effusion,sepsis,and abnormally elevated serum levels of LDH and D-D were independent influence factors for multiple bronchoalveolar lavage in children with MPP(p<0.05),based on this,a Nomogram prediction model can be established.The ROC analysis results showed that the AUC of the model to judge the multiple bronchoalveolar lavage in MPP patients was 0.828(SE=0.035,95%CI=0.760-0.896,p<0.001),the sensitivity was 0.813 and the specificity was 0.759.Conclusion:The multiple bronchoscopic bronchoalveolar lavage in MPP patients are associated with the levels of LDH and D-D,as well as the presence of pleural effusion and sepsis complications,the risk prediction model established,which based on this has high accuracy.
基金supported by the National Natural Science Foundation of China (32273010 and 31972681)the National Key Research and Development Program of China (2017YFD0501500)。
文摘Mycoplasma gallisepticum(MG) is a common avian pathogen that mainly infects poultry, causingsignificant reductions in body weight gain and egg production, along with damage to immune organs andimmunosuppression. MG is susceptible to co-infections with other pathogens, leading to increased mortalityrates and significant economic losses in the global poultry industry. While antibiotics have been extensivelyapplied worldwide to treat MG infections in poultry production, concerns regarding antibiotic resistanceand residue remain prevalent. Traditional Chinese medicine(TCM), renowned for its natural, safe, andnon-toxic properties, has shown significant anti-inflammatory and immune-enhancing effects. This studyaimed to investigate the protective effect of TCM on production performance and its impact on MG-inducedimmunosuppression through the MAPK/ERK/JNK signaling pathway in chickens. Our results showed that TCMalleviated the negative effects of MG infection on production performance, as evidenced by improvements inbody weight gain, feed conversion rate, survival rate, and immune organ index. TCM exhibited direct inhibitionof the MG proliferation in vitro and in vivo. Furthermore, TCM treatment promoted the normalization of tracheaand lung tissue structure in MG-infected chickens, leading to a significant reduction in inflammatory damage.Moreover, following the treatment with the TCM, the production of pro-inflammatory cytokines interleukin-1β(IL-1β) and tumor necrosis factor-α(TNF-α) decreased significantly, accompanied by the downregulation of pro-apoptotic genes caspase3, caspase9, and BAX, both in vitro and in vivo. A mechanism-based study showed that in vitro and in vivo treatment with the TCM significantly reduced the expression of key proteins, including early growth response gene 1(EGR1), p-ERK, p-JNK, and p-JUN. Altogether, TCM improved body weight gain, inhibited pro-inflammation responses, and alleviated tissue damage by inhibiting the MAPK/ERK/JNK signaling pathway to protect the performance and immune system of MG-infected chickens.
基金Research Project of Jiangsu Maternal and Child Health Care Association(Project No.:FX202335)。
文摘Objective:To investigate the correlation between Mycoplasma pneumoniae infection and childhood asthma,and to explore the impact of Mp infection on airway inflammation and airway hyperresponsiveness in children with asthma.Methods:58 children with bronchopneumonia admitted to the First People’s Hospital of Jintan,Changzhou from April 2024 to October 2024 were selected as the study subjects.The levels of cytokines IL-4,IL-17,TGF-β1,and INF-γ in the serum were compared between the MP group and non-MP group,as well as between the MP wheezing group and MP nonwheezing group.Results:The levels of IL-17 and IL-4 in the MP group were significantly higher than those in the non-MP group(P<0.05),while there was no statistically significant difference in the other indicators(P>0.05).Statistically significant differences in IL-17 and IL-4 were observed between the wheezing and non-wheezing groups(P<0.05),while there was no statistically significant difference in the other indicators(P>0.05).There was a significant difference in IL-17 among the groups(P<0.05).The difference in IL-17 between the MP group and non-MP group was significant(P<0.05),and the difference between the wheezing and non-wheezing groups was marginally significant(P<0.05).Conclusion:M.pneumoniae infection may be one of the risk factors for the onset of childhood asthma,but its mechanism remains unclear.Further research is needed to determine whether Mp infection can serve as a biomarker for childhood asthma and to elucidate its underlying mechanism.
基金Supported by Baoding Science and Technology Plan Project,No.2272P011Hebei Province Scientific Research Project,No.20241734Hebei Natural Science Foundation Project,No.H2024104011.
文摘BACKGROUND Mycoplasma pneumoniae(M.pneumoniae)is considered to be one of the causative agents of community acquired pneumonia in children with general or severe course of disease.Severe M.pneumoniae pneumonia(SMPP)has emerged as a crucial global health concern due to high mortality rate in children under 5 years,potentially life-threatening complications,and growing challenges in pediatric treatment associated with rising macrolide resistance.Additionally,MPP can be complicated by other bacterial and/or viral pathogens,which may exacerbate disease severity.After the lifting of strict non-pharmaceutical interventions(NPIs)worldwide,the dramatic rise of incidence of MPP in Asia and Europe was observed.AIM To perform the comprehensive study of community acquired MPP cases registered in 2023 in Baoding Hospital,China.METHODS A total of 1160 children from 1 month to 15 years old with confirmed MPP diagnosis were enrolled in the study.The blood and respiratory samples were collected within the 24 hours after admission.The hematological parameters,biochemical markers,cytokine profiles were assessed.The respiratory samples were tested for the presence of M.pneumoniae and other 23 bacterial/viral pathogens by multiplex polymerase chain reaction(PCR).The macrolide resistance mutations(A2063G,A2064G in the 23S rRNA gene of M.pneumoniae)were determined by PCR.RESULTS Number of MPP cases has dramatically increased starting August with peak in November.SMPP and general MPP(GMPP)were identified in 264 and 896 of 1160 hospitalized children.The binary logistic regression analysis identified six[C-reactive protein(CRP),lactate dehydrogenase,procalcitonin,erythrocyte sedimentation rate,fibrin and fibrinogen degradation products(FDPs),D-dimer]and four(neutrophils,CRP,FDPs,prothrombin time)predictors of SMPP in age groups 2-5 years and 6-15 years,respectively.Children with SMPP showed significantly higher levels of cytokine interleukin(IL)-17F(2-5 years),and cytokines interferon-gamma,tumor necrosis factoralpha,IL-10(6-13 years).Concomitant viral/bacterial pathogens were determined in 24.3%and 28.0%cases of SMPP and GMPP.Among them,Streptococcus pneumoniae(S.pneumoniae)and Haemophilus influenzae(H.influenzae)were predominant.93.2%cases of MPP were associated with macrolide resistant M.pneumoniae.CONCLUSION Specific MPP epidemiological pattern associated with lifting NPIs was revealed:Increase of hospitalized cases,prevalence of S.pneumoniae and H.influenzae among concomitant pathogens,93.2%of macrolide resistant M.pneumonia.
基金Supported by Key project of National Key R&D Program of China in 2022(2022YFC2502700).
文摘[Objectives]This study was conducted to explore the curative effect of Qingfei Ditan decoction combined with targeted drug penetration therapy of traditional Chinese medicine on severe mycoplasma pneumonia in children.[Methods]Based on the retrospective study method,children with severe mycoplasma pneumonia admitted to the Children s Hospital of Soochow University from April 2023 to October 2023 were selected,and divided into a treatment group including 56 cases and a control group including 145 cases.The curative effect and adverse reactions of the two groups were compared.[Results]The total effective rate of the treatment group was higher than that of the control group,and the disappearance time of cough and lung rales was shorter than that of the control group,and the incidence of adverse reactions was lower,showing statistical significance(P<0.05).However,defervescence time and bronchoscope flushing rate showed no significant difference(P>0.05).[Conclusions]Qingfei Ditan Decoction combined with targeted drug penetration therapy of traditional Chinese medicine has a significant effect on severe mycoplasma pneumonia in children,and can reduce the side effects of drugs.It is a safe and efficient combination treatment scheme of traditional Chinese medicine.
文摘BACKGROUND Mycoplasma pneumoniae(MP)is a prevalent pathogen that causes respiratory infections in children and adolescents.AIM To assess the differences in the clinical features of MP-associated communityacquired pneumonia(CAP)in children who presented with mild or severe mycoplasma pneumoniae pneumonia(MPP);to identify the incidence of myocardial damage between the two groups.METHODS This work is a retrospective study.We identified children between 2 mo and 16 years of age with clinical and radiological findings consistent with CAP.We admitted patients to the inpatient department of the Second Hospital of Jilin University,Changchun,China,from January 2019 to December 2019.RESULTS A total of 409 hospitalized patients were diagnosed with MPP.Among them were 214(52.3%)males and 195(47.7%)females.The duration of fever and cough was the longest in severe MPP cases.Similarly,plasma levels of highly sensitive Creactive protein(t=-2.834,P<0.05),alanine transaminase(t=-2.511,P<0.05),aspartate aminotransferase(t=-2.939,P<0.05),and lactate dehydrogenase(LDH)(t=-2.939,P<0.05)were all elevated in severe MPP cases compared with mild MPP cases,and these elevations were statistically significant(P<0.05).Conversely,the neutrophil percentage was significantly lower in severe MPP cases than in mild MPP cases.The incidence of myocardial damage was significantly higher in severe MPP cases than in mild MPP cases(χ^(2)=157.078,P<0.05).CONCLUSION Mycoplasma pneumoniae is the main cause of CAP.The incidence of myocardial damage was higher and statistically significant in severe MPP cases than in mild MPP cases.
基金Supported by National Natural Science Foundation of China(31100135)Agricultural Independent Innovation Fund of Jiangsu Province[CX(11)4038]~~
文摘Mycoplasma hyopneumoniae is an important pathogen causing Mycoplasmal pneumonia of swine, which generally causes secondary infections and mixed infections, thus seriously threats the development of swine industry and resulting in huge economic losses. Using PCR technology has very important significance to the correct diagnosis of Mycoplasmal pneumonia at the early stage. In this paper, specific target genes of Mycoplasma hyopneumoniae, methods for clinical sample collection, key technical factors of DNA sample processing method, and the research progress, main advantages and disadvantages, and application of general PCR technology, multiple PCR technology, nested-PCR technology, real-time fluorescence quantitative PCR technology, gene chip detection technology and loop-mediated isothermal amplification in detection of Mycoplasma hyopneumoniae were summarized, which provided convenience for the effective diagnosis and prevention of Mycoplasmal pneumonia of swine.
基金Supported by Special Program of National Science and Technology Basic Work (2008FY210200)Special Program of Gansu Agricultural Biotechnology (GNSW-2005-16)~~
文摘[Objective] The aim was to investigate the prevalence of Mycoplasma capricolum subsp. Capripneumoniae in Qinghai Province. [Method] By using indirect hemagglutination test kit for detecting Mycoplasma capricolum subsp. Capripneumoniae,208 goat serums were detected. [Result] The positive rate of goat sera was 16.3%,and the positive rate of sera from different regions ranged from 6.7% to 24.3%. [Conclusion] The infection rate of Mycoplasma capricolum subsp. Capripneumoniae was high in Qinghai Province,so it is necessary to strengthen the prevention and control of this disease.
基金Supported by the Special Project of Department of Science and Technology of Hebei Province(08820412D)the Special Project of Qinhuangdao Municipal Bureau of Science and Technology[Qinkeji(2003)30-35]+1 种基金the Special Project of Shijiazhuang Municipal Bureau of Science and Technology(07150193A)the Scientific Research Innovation Team Project of Hebei Normal University of Science and Technology(TD201201)~~
文摘[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring the minimum inhibitory concentra-tion, the in vitro antibacterial activity of golden buckwheat water extract was deter-mined; meanwhile, the therapeutic effect of golden buckwheat oral solution on my-coplasma infection was determined by artificial y infecting chickens with Mycoplasma gal isepticum culture. [Results] The golden buckwheat water extract had obvious in-hibitory effects against Pseudomonas aeruginosa and Escherichia coli, and a certain inhibitory effect on Salmonel a and Staphylococcus aureus; administration of golden buckwheat oral solution at the dose of 0.5%-1.0% continuously for 5 d had a good therapeutic effect against mycoplasma infection. [Conclusion] The study provides sci-entific bases for further study on the antibacterial activity of golden buckwheat and its application.
基金Supported by the Fund for Agricultural Science and Technology Independent Innovation of Jiangsu Province[CX(12)1001-05]~~
文摘ObjectiveThis study was to establish a simple method for collecting and detecting Mycoplasma hyopneumoniae （Mhp） in aerosol. MethodBased on the mechanisms of liquid impinger and filtration sampler, a double concentration aerosol sampler was designed for collecting Mhp aerosol. Firstly, the collection was performed in a closed environment full of artificial aerosol of Mhp. Secondly, collection efficiency was detected by real-time PCR. Thereafter, the clinical feasibility of the designed equipment was tested by collecting aerosol samples in different pig herds. In one assay, the samples were collected at different times from one pig house challenged with Mhp. In another assay, the samples was collected from the delivery room, nursery and fattenning house of a MPS outbreak farm as well as a Mhp infection positive pig farm without obvious clinical symptoms. All the aerosol samples were then detected by real-time PCR or nested PCR. ResultThe collection efficiency of the designed bioaerosol sampler was （37.04±6.43） %, Mhp could be detected 7 d after intratracheal challenge with pneumonic lung homogenate suspension. Aerosol samples of 11 pig houses from the two Mhp positive pig farms with or without clinical symptoms all showed a positive result of PCR, the positivity rate was 100%. ConclusionA high sensitive collecting and detecting technology of aerosol was successfully established, which can be applied to clinical detection of Mhp in aerosol.
基金Supported by National 863 Project (102-10-01-08)National Natural Science Foundation of China(39570405)+1 种基金Natural Science Foundation of Beijing(7941001)State Key Basic Research Program(G1998051203)
文摘AIM: To explore relationships between human carcinomas and mycoplasma infection. METHODS: Monoclonal antibody PD4, which specifically recognizes a distinct protein from mycoplasma hyorhinis, was used to detect mycoplasma infection in different paraffin embedded carcinoma tissues with immunohistochemistry. PCR was applied to amplify the mycoplasma DNA from the positive samples for confirming immunohistochemistry. RESULTS: Fifty of 90 cases (56%) of gastric carcinoma were positive for mycoplasma hyorhinis. In other gastric diseases, the mycoplasma infection ratio was 28% (18/49) in chronic superficial gastritis, 30% (14/46) in gastric ulcer and 37% (18/49) in intestinal metaplasia. The difference is significant with gastric cancer (chi(2) = 12.06, P 【 0.05). In colon carcinoma, the mycoplasma infection ratio was 55.1% (32/58),but it was 20.9% (10/49)in adenomarous polyp (chi(2)=13.46, P 【 0.005). Gastric and colon cancers with high differentiation had a higher mycoplasma infection ratio than those with low differentiation (P 【 0.05). Mycoplasma infection in esophageal cancer, lung cancer, breast cancer and glioma was 50.9% (27/53), 52.6% (31/59), 39.7% (25/63) and 41% (38/91), respectively. The mycoplasma DNA was successfully amplified with the DNA extracted from the cancer tissues that were positive for mycoplasma infection (detected with antibody PD4). CONCLUSION: There was high correlation between mycoplasma infection and different cancers, which suggests the possibility of an association between the two. The mechanism involved in oncogenesis by mycoplasma remains unknown.
基金Supported by the National Natural Science Foundation of China(31100136)the Special Fund for Independent Innovation of Agricultural Science and Technology in Jiangsu Province[CX(12)5051]~~
文摘[Objective] This study aimed to investigate the secretory expression of P97R1 gene of Mycoplasma hyopneumoniae（Mhp） in Pichia pastoris expression system and the primary application; of the expression product. [Method] A pair of specific primers was designed to conduct PCR according to the Mhp P97R1 gene sequence in Genbank, and the amplified P97R1 gene was cloned into the pPICZa-A yeast expression vector to construct the secretory recombinant expression vector pPICZa-A-P97R1. The plasmid pPICZa-A-p97R1 linearized by Sac I was transformed into P. pastoris GSl15 by electroporation. Positive transformant identified by PCR was incubated to express P97R1 protein after methanol induction. And the expression product was identified using SDS-PAGE and Western-blotting anal.wsis. [Result] P97R1 protein was successfully expressed in the P. pastoris system, with a secre- tory amount of 499μg/ml, and revealed good reactogenicity. Meanwhile, an indirect ELISA method was established with P97R1 protein after the optimization of each reaction factor, which showed good specificity and repeatability according to repeated tests. [Conclusion] This study provides bases for developing the ELISA Kit for anti- body detection and genetically engineered vaccine to Mhp.
基金Science and Technology Plan Project of Jinan Health Committee(Grant No.2021-1-08)。
文摘The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously affecting the quality of life of children.The selection,dosage,and course of anti-MP drugs in children with RMPP have brought a lot of troubles to pediatric hospitals.In the present study,the characteristics,usage and dosage,drug resistance mechanism,and treatment progress of anti-MP drugs for the treatment of RMPP in children were reviewed.Collectively,our findings provided ideas for the treatment of children with RMPP using anti-MP drugs.
基金Project (No. 30770115) supported by the National Natural Science Foundation of China
文摘Mycoplasmas, the smallest free-living, self-replicating bacteria with diameters of 200 to 800 nm, have been reported to be associated with human diseases. It is well known that the mycoplasma lipoprotein/peptide is able to modulate the host immune system, whose N-terminal structure is an important factor in inducing immunity and distinguishing Toll-like receptors (TLRs). However, there is still no clear elucidation about the pathogenic mechanism of mycoplasma lipoprotein/peptide and the signaling pathway. Some researchers have focused on understanding the structures of these proteins and the relationships between their structure and biological function. This review provides an update on the research in this field.
