African swine fever(ASF)is an infectious disease caused by African swine fever virus(ASFV)with clinical symptoms of high fever,hemorrhages and high mortality rate,posing a threat to the global swine industry and food ...African swine fever(ASF)is an infectious disease caused by African swine fever virus(ASFV)with clinical symptoms of high fever,hemorrhages and high mortality rate,posing a threat to the global swine industry and food security.Quarantine and control of ASFV is crucial for preventing swine industry from ASFV infection.In this study,a recombinase polymerase amplification(RPA)-CRISPR-based nucleic acid detection method was developed for diagnosing ASF.As a highly sensitive method,RPA-CRISPR can detect even a single copy of ASFV plasmid and genomic DNA by determining fluorescence signal induced by collateral cleavage of CRISPR-lw Cas13 a(previously known as C2c2)through quantitative real-time PCR(q PCR)and has the same or even higher sensitivity than the traditional q PCR method.A lateral flow strip was developed and used in combination with RPA-CRISPR for ASFV detection with the same level of sensitivity of Taq Man q PCR.Likewise,RPA-CRISPR is capable of distinguishing ASFV genomic DNA from viral DNA/RNA of other porcine viruses without any cross-reactivity.This diagnostic method is also available for diagnosing ASFV clinical DNA samples with coincidence rate of 100%for both ASFV positive and negative samples.RPA-CRISPR has great potential for clinical quarantine of ASFV in swine industry and food security.展开更多
Rabies remains a public health threat that kills approximately 59,000 people worldwide each year,most of which are from the developing countries of Africa and Asia where dog rabies are endemic.Therefore, developing an...Rabies remains a public health threat that kills approximately 59,000 people worldwide each year,most of which are from the developing countries of Africa and Asia where dog rabies are endemic.Therefore, developing an affordable and efficacious vaccine is crucial for rabies control in these countries. Interleukin(IL)-15, an immunoregulatory cytokine, is a pluripotent molecule with therapeutic potential, which targets many cell types and links the innate and adaptive immune system. In this study, IL-15 gene was cloned and inserted into the genome of a recombinant rabies virus(RABV) strain LBNSE(designated as LBNSE-IL15), and the effect of over-expression of IL-15 on the immunogenicity of RABV was investigated. It was found that mice vaccinated with LBNSEIL15 could induce significantly higher level of virus-neutralizing antibody(VNA) than those immunized with LBNSE, resulting in the higher protection after challenge. Further investigation was performed to find out the possible role of IL-15 plays in the process of antibody induction, and it was found that LBNSE-IL15 could enhance the maturation of dendritic cells(DCs) in immunized mice. Furthermore, the mice immunized with LBNSE-IL15 could promote the T_(FH) cells differentiation and the generation of germinal center B cells and plasma cells. Together, these data indicated that IL-15 could be a potential adjuvant in enhancing the immunogenicity of RABV, contributing to the development of more-efficacious rabies vaccines.展开更多
Bordetella bronchiseptica(Bb)is recognized as a leading cause of respiratory diseases in dogs and cats.However,epidemiological data on Bb in dogs and cats in China are still limited,and there is no commercially availa...Bordetella bronchiseptica(Bb)is recognized as a leading cause of respiratory diseases in dogs and cats.However,epidemiological data on Bb in dogs and cats in China are still limited,and there is no commercially available vaccine.Live vaccines containing Bb that are widely used abroad are generally efective but can establish latency and potentially reactivate to cause illness in some immunodefcient vaccinated recipients,raising safety concerns.In this study,34 canine-derived and two feline-derived Bb strains were isolated from 1809 canine and 113 feline nasopharyngeal swab samples collected from eight provinces in China from 2021 to 2023.The PCR results showed that the percentage of positive Bb was 22.94%(441/1922),and more than 90%of the Bb isolates had four virulence factor-encoding genes(VFGs),namely,fhaB,prn,betA and dnt.All the isolated strains displayed a multidrug-resistant phenotype.The virulence of 10 Bb strains isolated from dogs with respiratory symptoms was tested in mice,and we found that eight isolates were highly virulent.Furthermore,the eight Bb isolates with high virulence were inactivated and intramuscularly injected into mice,and three Bb strains(WH1218,WH1203 and WH1224)with the best protective efcacy were selected.Dogs immunized with these three strains exhibited strong protection against challenge with the Bb feld strain WH1218.Ultimately,the WH1218 strain with the greatest protection in dogs was selected as the vaccine candidate.Dogs and cats that received a vaccine containing 109 CFU of the inactivated WH1218 strain showed complete protection against challenge with the Bb feld strain WH1218.This study revealed that Bb is an important pathogen that causes respiratory diseases in domestic dogs and cats in China,and all the isolates exhibited multidrug resistance.The present work contributes to the current understanding of the prevalence,antimicrobial resistance,and virulence genes of Bb in domestic dogs and cats.Additionally,our results suggest that the WH1218 strain is a promising candidate safe and efcacious inactivated Bb vaccine.展开更多
Animals play an important role in our lives.Increased human-animal interactions lead to the transmission of zoonotic pathogens between animals and humans,directly threatening human health and societal development.Near...Animals play an important role in our lives.Increased human-animal interactions lead to the transmission of zoonotic pathogens between animals and humans,directly threatening human health and societal development.Nearly all major public health events that occurred in the last several decades have been closely related to animal diseases.Approximately,60%of human infectious diseases are zoonotic,and 75%of emerging human infectious diseases originate from animals.As of April 20,2022,the global coronavirus infectious disease19(COVID-19)pandemic caused more than 503 million infections and more than 6.2 million deaths in humans.Over 11 billion doses of vaccines have been given to humans worldwide(WHO 2022).Despite the consensus among international organizations and animal experts that the SARS-CoV-2 originated from animals,the route of transmission between humans and other animals remains unclear.Furthermore,it is still a challenge for continually tracing the origin of SARS-CoV-2.展开更多
Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in h...Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in humans and animals. In this study, the relationship between exhaustive exercise and the humoral immune response after immunization with inactivated rabies vaccine was investigated in a mouse model with one-time exhaustive exercise. It was found that compared with the mice with no exercise after vaccination, no significant differences were found in those with exhaustive exercise after vaccination on body-weight changes, virus-neutralizing antibody(VNA) titers, antibody subtypes and survivor ratio after lethal rabies virus(RABV) challenge. This study indicated that exhaustive exercise does not reduce the effects of the rabies inactivated vaccine.展开更多
It is indeed our great pleasure to have the inaugural issue of the Animal Diseases,an open access and fast peer-reviewed journal,published.Animal diseases not only cause enormous economic losses(more than 20%)to the a...It is indeed our great pleasure to have the inaugural issue of the Animal Diseases,an open access and fast peer-reviewed journal,published.Animal diseases not only cause enormous economic losses(more than 20%)to the animal farming industry,but also pose serious threats to human health as more than 60%human infectious diseases originate in animals.Therefore,it is absolutely imperative to conduct research on all aspects of animal diseases as well as to develop novel drugs,vaccines,diagnostic methods and technologies to address above challenges.To promote One Health initiative,Animal Diseases is committed to publish high quality manuscripts in animal disease research/application which are closely related to human health,including the latest state-of-the-art articles from academia,government laboratories and industry experts.The journal publishes original research,review,case report and other types of communications in all areas of animal diseases,infectious or noninfectious.It has partnered with BMC,part of SpringerNature,and a pioneer of open access publishing.Initially electronic publication will proceed as manuscripts are accepted.展开更多
Pets become vital companions in human life.Tey ofer companionship and emotional support,and contribute signifcantly to physical and mental health,as well as social activities.Living with pets can stimulate human bodie...Pets become vital companions in human life.Tey ofer companionship and emotional support,and contribute signifcantly to physical and mental health,as well as social activities.Living with pets can stimulate human bodies to release more“afnity hormones”such as serotonin,dopamine,and oxytocin,which helps alleviate negative emotions.Te human-animal bond can enhance the human body’s ability to eliminate toxins,reduce the risk of illnesses,strengthen the immune system,and alleviate depressive symptoms.Moreover,pet-related social activities can facilitate the making of new friends and the establishment of social connections,serving as a bridge for those who struggle with social interactions.展开更多
We share with great sadness that our long-time friend and colleague,Prof.Dr.Bernhard Dietzschold,passed away surrounded by his family on May 2,2022,at the age of 81.With the passing of Bernhard Dietzschold,the worldwi...We share with great sadness that our long-time friend and colleague,Prof.Dr.Bernhard Dietzschold,passed away surrounded by his family on May 2,2022,at the age of 81.With the passing of Bernhard Dietzschold,the worldwide virology and infectious disease community is losing an eminent representative who has shaped the scientific landscape of its discipline for decades.展开更多
On August 14th,2018,a Beijing resident living in Xicheng District found a female H.longicornis tick attached to the skin at the front of his upper shin.On examination,the patient was afebrile and appeared well.The spe...On August 14th,2018,a Beijing resident living in Xicheng District found a female H.longicornis tick attached to the skin at the front of his upper shin.On examination,the patient was afebrile and appeared well.The species of the tick was identified through morphological characteristics and phylogenetic analysis based on cytochrome C oxidase subunit I.This H.longicornis tick was screened for tick-borne pathogens such as viruses,bacteria and parasites.RNA pathogens were screened by PCR and sequencing,while DNA pathogens were screened by metagenomic analyses.It was found that the tick was positive for the DNA sequences of zoonotic and animal pathogens such as A phagocytophilum,Ehrlichia minasensis and C.burnetii.Considering the good health condition of the patient,we hypothesized that the pathogens originated from the tick specimen itself rather than host blood meal.For the first time,our study reveals the possible risk of transmission of tick-borne pathogens to human beings through tick bit in downtown Beijing.Further research is needed to screen for tick-borne pathogens among unfed ticks collected from central Beijing.展开更多
CURRENT STATUS OF RABIES IN CHINA Through concerted stakeholder effort,rabies prevention and control in China has achieved remarkable results.The reported incidence of human rabies continues to decline at a rate of ap...CURRENT STATUS OF RABIES IN CHINA Through concerted stakeholder effort,rabies prevention and control in China has achieved remarkable results.The reported incidence of human rabies continues to decline at a rate of approximately 20%each year.In 2020,a total of 202 human rabies cases were reported countrywide,a decrease of 94%when compared with the most recent peak in 2007(3,300 human cases).Likewise,rabies was reported only in 143 counties and districts.展开更多
Mycobacterium tuberculosis is the causative agent of tuberculosis(TB), which is still the leading cause of mortality from a single infectious disease worldwide. The development of novel anti-TB drugs and vaccines is s...Mycobacterium tuberculosis is the causative agent of tuberculosis(TB), which is still the leading cause of mortality from a single infectious disease worldwide. The development of novel anti-TB drugs and vaccines is severely hampered by the complicated and time-consuming genetic manipulation techniques for M. tuberculosis. Here, we harnessed an endogenous type Ⅲ-A CRISPR/Cas10 system of M. tuberculosis for efficient gene editing and RNA interference(RNAi).This simple and easy method only needs to transform a single mini-CRISPR array plasmid, thus avoiding the introduction of exogenous protein and minimizing proteotoxicity. We demonstrated that M. tuberculosis genes can be efficiently and specifically knocked in/out by this system as confirmed by DNA high-throughput sequencing. This system was further applied to single-and multiple-gene RNAi. Moreover, we successfully performed genome-wide RNAi screening to identify M. tuberculosis genes regulating in vitro and intracellular growth. This system can be extensively used for exploring the functional genomics of M. tuberculosis and facilitate the development of novel anti-TB drugs and vaccines.展开更多
基金supported by the National Natural Science Foundation of China(31522057 and 31872451 to LZ,31720103917 and 31872452 to ZF)。
文摘African swine fever(ASF)is an infectious disease caused by African swine fever virus(ASFV)with clinical symptoms of high fever,hemorrhages and high mortality rate,posing a threat to the global swine industry and food security.Quarantine and control of ASFV is crucial for preventing swine industry from ASFV infection.In this study,a recombinase polymerase amplification(RPA)-CRISPR-based nucleic acid detection method was developed for diagnosing ASF.As a highly sensitive method,RPA-CRISPR can detect even a single copy of ASFV plasmid and genomic DNA by determining fluorescence signal induced by collateral cleavage of CRISPR-lw Cas13 a(previously known as C2c2)through quantitative real-time PCR(q PCR)and has the same or even higher sensitivity than the traditional q PCR method.A lateral flow strip was developed and used in combination with RPA-CRISPR for ASFV detection with the same level of sensitivity of Taq Man q PCR.Likewise,RPA-CRISPR is capable of distinguishing ASFV genomic DNA from viral DNA/RNA of other porcine viruses without any cross-reactivity.This diagnostic method is also available for diagnosing ASFV clinical DNA samples with coincidence rate of 100%for both ASFV positive and negative samples.RPA-CRISPR has great potential for clinical quarantine of ASFV in swine industry and food security.
基金partially supported by the National Natural Science Foundation of China(31402176,31372419,31522057)the National Program on Key Research Project of China(2016YFD0500400)+2 种基金the Fundamental Research Funds for the Central Universities(2662016 QD036,to MZ)the Ministry of Science and Technology of China(863 program,number 2011AA10A212)the Ministry of Agriculture of China(special fund for Agro-scientific research in the Public Interest,2013 03042,to ZFF)
文摘Rabies remains a public health threat that kills approximately 59,000 people worldwide each year,most of which are from the developing countries of Africa and Asia where dog rabies are endemic.Therefore, developing an affordable and efficacious vaccine is crucial for rabies control in these countries. Interleukin(IL)-15, an immunoregulatory cytokine, is a pluripotent molecule with therapeutic potential, which targets many cell types and links the innate and adaptive immune system. In this study, IL-15 gene was cloned and inserted into the genome of a recombinant rabies virus(RABV) strain LBNSE(designated as LBNSE-IL15), and the effect of over-expression of IL-15 on the immunogenicity of RABV was investigated. It was found that mice vaccinated with LBNSEIL15 could induce significantly higher level of virus-neutralizing antibody(VNA) than those immunized with LBNSE, resulting in the higher protection after challenge. Further investigation was performed to find out the possible role of IL-15 plays in the process of antibody induction, and it was found that LBNSE-IL15 could enhance the maturation of dendritic cells(DCs) in immunized mice. Furthermore, the mice immunized with LBNSE-IL15 could promote the T_(FH) cells differentiation and the generation of germinal center B cells and plasma cells. Together, these data indicated that IL-15 could be a potential adjuvant in enhancing the immunogenicity of RABV, contributing to the development of more-efficacious rabies vaccines.
基金the Guangdong Major Project of Basic and Applied Basic Research(2020B0301030007).
文摘Bordetella bronchiseptica(Bb)is recognized as a leading cause of respiratory diseases in dogs and cats.However,epidemiological data on Bb in dogs and cats in China are still limited,and there is no commercially available vaccine.Live vaccines containing Bb that are widely used abroad are generally efective but can establish latency and potentially reactivate to cause illness in some immunodefcient vaccinated recipients,raising safety concerns.In this study,34 canine-derived and two feline-derived Bb strains were isolated from 1809 canine and 113 feline nasopharyngeal swab samples collected from eight provinces in China from 2021 to 2023.The PCR results showed that the percentage of positive Bb was 22.94%(441/1922),and more than 90%of the Bb isolates had four virulence factor-encoding genes(VFGs),namely,fhaB,prn,betA and dnt.All the isolated strains displayed a multidrug-resistant phenotype.The virulence of 10 Bb strains isolated from dogs with respiratory symptoms was tested in mice,and we found that eight isolates were highly virulent.Furthermore,the eight Bb isolates with high virulence were inactivated and intramuscularly injected into mice,and three Bb strains(WH1218,WH1203 and WH1224)with the best protective efcacy were selected.Dogs immunized with these three strains exhibited strong protection against challenge with the Bb feld strain WH1218.Ultimately,the WH1218 strain with the greatest protection in dogs was selected as the vaccine candidate.Dogs and cats that received a vaccine containing 109 CFU of the inactivated WH1218 strain showed complete protection against challenge with the Bb feld strain WH1218.This study revealed that Bb is an important pathogen that causes respiratory diseases in domestic dogs and cats in China,and all the isolates exhibited multidrug resistance.The present work contributes to the current understanding of the prevalence,antimicrobial resistance,and virulence genes of Bb in domestic dogs and cats.Additionally,our results suggest that the WH1218 strain is a promising candidate safe and efcacious inactivated Bb vaccine.
文摘Animals play an important role in our lives.Increased human-animal interactions lead to the transmission of zoonotic pathogens between animals and humans,directly threatening human health and societal development.Nearly all major public health events that occurred in the last several decades have been closely related to animal diseases.Approximately,60%of human infectious diseases are zoonotic,and 75%of emerging human infectious diseases originate from animals.As of April 20,2022,the global coronavirus infectious disease19(COVID-19)pandemic caused more than 503 million infections and more than 6.2 million deaths in humans.Over 11 billion doses of vaccines have been given to humans worldwide(WHO 2022).Despite the consensus among international organizations and animal experts that the SARS-CoV-2 originated from animals,the route of transmission between humans and other animals remains unclear.Furthermore,it is still a challenge for continually tracing the origin of SARS-CoV-2.
基金partially supported by the National Natural Science Foundation of China (31702248, 31402176, 31372419 and 31522057)the National Science Foundation for Postdoctoral Scientists of China (Grant No. 20163M590701)+2 种基金the National Program on Key Research Project of China (2016YFD0500400)the Fundamental Research Funds for the Central Universities (2662016QD036, to MZ) the Ministry of Agriculture of China (special fund for Agro-scientific research in the Public Interest, 201303042)
文摘Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in humans and animals. In this study, the relationship between exhaustive exercise and the humoral immune response after immunization with inactivated rabies vaccine was investigated in a mouse model with one-time exhaustive exercise. It was found that compared with the mice with no exercise after vaccination, no significant differences were found in those with exhaustive exercise after vaccination on body-weight changes, virus-neutralizing antibody(VNA) titers, antibody subtypes and survivor ratio after lethal rabies virus(RABV) challenge. This study indicated that exhaustive exercise does not reduce the effects of the rabies inactivated vaccine.
文摘It is indeed our great pleasure to have the inaugural issue of the Animal Diseases,an open access and fast peer-reviewed journal,published.Animal diseases not only cause enormous economic losses(more than 20%)to the animal farming industry,but also pose serious threats to human health as more than 60%human infectious diseases originate in animals.Therefore,it is absolutely imperative to conduct research on all aspects of animal diseases as well as to develop novel drugs,vaccines,diagnostic methods and technologies to address above challenges.To promote One Health initiative,Animal Diseases is committed to publish high quality manuscripts in animal disease research/application which are closely related to human health,including the latest state-of-the-art articles from academia,government laboratories and industry experts.The journal publishes original research,review,case report and other types of communications in all areas of animal diseases,infectious or noninfectious.It has partnered with BMC,part of SpringerNature,and a pioneer of open access publishing.Initially electronic publication will proceed as manuscripts are accepted.
文摘Pets become vital companions in human life.Tey ofer companionship and emotional support,and contribute signifcantly to physical and mental health,as well as social activities.Living with pets can stimulate human bodies to release more“afnity hormones”such as serotonin,dopamine,and oxytocin,which helps alleviate negative emotions.Te human-animal bond can enhance the human body’s ability to eliminate toxins,reduce the risk of illnesses,strengthen the immune system,and alleviate depressive symptoms.Moreover,pet-related social activities can facilitate the making of new friends and the establishment of social connections,serving as a bridge for those who struggle with social interactions.
文摘We share with great sadness that our long-time friend and colleague,Prof.Dr.Bernhard Dietzschold,passed away surrounded by his family on May 2,2022,at the age of 81.With the passing of Bernhard Dietzschold,the worldwide virology and infectious disease community is losing an eminent representative who has shaped the scientific landscape of its discipline for decades.
基金This study was funded by the national key research and development programs of China(No.2017YFD0501803 and 2016YFD0501100)the Young Talents Program of the Chinese Academy of Inspection and Quarantine.
文摘On August 14th,2018,a Beijing resident living in Xicheng District found a female H.longicornis tick attached to the skin at the front of his upper shin.On examination,the patient was afebrile and appeared well.The species of the tick was identified through morphological characteristics and phylogenetic analysis based on cytochrome C oxidase subunit I.This H.longicornis tick was screened for tick-borne pathogens such as viruses,bacteria and parasites.RNA pathogens were screened by PCR and sequencing,while DNA pathogens were screened by metagenomic analyses.It was found that the tick was positive for the DNA sequences of zoonotic and animal pathogens such as A phagocytophilum,Ehrlichia minasensis and C.burnetii.Considering the good health condition of the patient,we hypothesized that the pathogens originated from the tick specimen itself rather than host blood meal.For the first time,our study reveals the possible risk of transmission of tick-borne pathogens to human beings through tick bit in downtown Beijing.Further research is needed to screen for tick-borne pathogens among unfed ticks collected from central Beijing.
文摘CURRENT STATUS OF RABIES IN CHINA Through concerted stakeholder effort,rabies prevention and control in China has achieved remarkable results.The reported incidence of human rabies continues to decline at a rate of approximately 20%each year.In 2020,a total of 202 human rabies cases were reported countrywide,a decrease of 94%when compared with the most recent peak in 2007(3,300 human cases).Likewise,rabies was reported only in 143 counties and districts.
基金supported by the National Key R&D Program of China(Grant No.2017YFD0500303)the National Natural Science Foundation of China(Grant Nos.C180501 and 31602061)+1 种基金the Huazhong Agricultural University Scientific&Technological Self-innovation Foundation,China(Grant Nos.2662017PY105 and 2662017PY105)the Doctoral Fund of Ministry of Education of China(Grant No.131012).
文摘Mycobacterium tuberculosis is the causative agent of tuberculosis(TB), which is still the leading cause of mortality from a single infectious disease worldwide. The development of novel anti-TB drugs and vaccines is severely hampered by the complicated and time-consuming genetic manipulation techniques for M. tuberculosis. Here, we harnessed an endogenous type Ⅲ-A CRISPR/Cas10 system of M. tuberculosis for efficient gene editing and RNA interference(RNAi).This simple and easy method only needs to transform a single mini-CRISPR array plasmid, thus avoiding the introduction of exogenous protein and minimizing proteotoxicity. We demonstrated that M. tuberculosis genes can be efficiently and specifically knocked in/out by this system as confirmed by DNA high-throughput sequencing. This system was further applied to single-and multiple-gene RNAi. Moreover, we successfully performed genome-wide RNAi screening to identify M. tuberculosis genes regulating in vitro and intracellular growth. This system can be extensively used for exploring the functional genomics of M. tuberculosis and facilitate the development of novel anti-TB drugs and vaccines.
