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国外Swabbing Equipment抽汲装置研究 被引量:1
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作者 潘智勇 《内蒙古石油化工》 CAS 2012年第3期4-5,共2页
在试油作业中,为求目的层产量等参数时,若地层能量不足以使油井自喷,则采取抽汲等方式进行诱喷或求产。国外试油过程中抽汲作业多采用油管内抽汲,Swabbing Equipment抽汲装置具有结构简单、安全系数和抽汲效率高的优点,值得国内从事试... 在试油作业中,为求目的层产量等参数时,若地层能量不足以使油井自喷,则采取抽汲等方式进行诱喷或求产。国外试油过程中抽汲作业多采用油管内抽汲,Swabbing Equipment抽汲装置具有结构简单、安全系数和抽汲效率高的优点,值得国内从事试油工作者借鉴和参考。 展开更多
关键词 试油 抽汲装置 swabBING EQUIPMENT 诱喷
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A study of female genital swabs in a Nigerian Tertiary Hospital 被引量:1
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作者 Samuel Nwadioha Julie O Egesie +1 位作者 Henry Emejuo Elizabeth Iheanacho 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第7期577-579,共3页
Objective:To detect some common microbial agents of vaginal discharge and improve the current syndromic management of abnormal vaginal discharge.Methods:A prospective study of female genital swabs collected from obste... Objective:To detect some common microbial agents of vaginal discharge and improve the current syndromic management of abnormal vaginal discharge.Methods:A prospective study of female genital swabs collected from obstetrics and gynecology units of Aminu Kano Teaching Hospital,Kano,Nigeria and an analysed of microscopy,culture and sensitivity in the medical microbiology and parasitology laboratory of this hospital were conducted from December 2007 to December 2008.Data on epidemiologic indices were collected from the patients,using structured interviewer-administered questionnaires.Results:Eight hundred and forty Candida species were detected,constituting 60%(n=840) of 1 400 female genital discharge samples of microbial etiology in a total of 2 000 female genital samples received.The distribution of vaginal candidiasis was tbe highest in young adults aged 21 to 30 years with 43%(n=360) of the total 840 cases. Pregnant women that presented with vaginal candidiasis constituted 40%(n=360) of the total 840 cases.Other risk groups included the immuno-suppression with 24%(n=202),group on hormonal therapy with 15%(n=126) and broad spectrum antibiotics users with 16%(n=134).Conclusions: The results show that Candida is the most common cause of vaginitis and vulvo-vaginal candidiasis followed by C.albicans in the young adults aged 21 to 30 years,pregnant mothers, immuno-suppression,contraceptive and broad spectrum antibiotic users.Proper management of vaginal candidiasis and vulvo-vaginal candidiasis is recommended especially among the risk groups in order to avoid complications and reduce HIV transmission. 展开更多
关键词 GENITAL swabS Microscopy Culture Sensitivity
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Swab culture monitoring of automated endoscope reprocessors after high-level disinfection 被引量:1
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作者 Lung-Sheng Lu Yi-Chun Chiu +2 位作者 Ming-Tzung Lin Tsung-Hui Hu King-Wah Chiu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第14期1660-1663,共4页
AIM:To conduct a bacterial culture study for monitoring decontamination of automated endoscope reprocessors(AERs) after high-level disinfection(HLD).METHODS:From February 2006 to January 2011,authors conducted randomi... AIM:To conduct a bacterial culture study for monitoring decontamination of automated endoscope reprocessors(AERs) after high-level disinfection(HLD).METHODS:From February 2006 to January 2011,authors conducted randomized consecutive sampling each month for 7 AERs.Authors collected a total of 420 swab cultures,including 300 cultures from 5 gastroscope AERs,and 120 cultures from 2 colonoscope AERs.Swab cultures were obtained from the residual water from the AERs after a full reprocessing cycle.Samples were cultured to test for aerobic bacteria,anaerobic bacteria,and mycobacterium tuberculosis.RESULTS:The positive culture rate of the AERs was 2.0%(6/300) for gastroscope AERs and 0.8%(1/120) for colonoscope AERs.All the positive cultures,including 6 from gastroscope and 1 from colonoscope AERs,showed monofloral colonization.Of the gastroscopeAER samples,50%(3/6) were colonized by aerobic bacterial and 50%(3/6) by fungal contaminations.CONCLUSION:A full reprocessing cycle of an AER with HLD is adequate for disinfection of the machine.Swab culture is a useful method for monitoring AER decontamination after each reprocessing cycle.Fungal contamination of AERs after reprocessing should also be kept in mind. 展开更多
关键词 Automated endoscope reprocessor Gastrointestinal scope High-level disinfection swab culture MONITORING DECONTAMINATION
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Endocervical Swab Microbial Isolates among Women with Third Degree Uterovaginal Prolapse
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作者 K. C. Ekwedigwe I. Sunday-Adeoye +4 位作者 M. E. Isikhuemen M. O. Eliboh A. B. C. Daniyan E. N. Yakubu I. C. Amamilo 《Open Journal of Obstetrics and Gynecology》 2017年第3期369-375,共7页
Background: Uterovaginal prolapse is the descent of the uterus through the vaginal canal. This may be a predisposing factor to infections in the urogenital system. This study aimed to assess the endocervical swab micr... Background: Uterovaginal prolapse is the descent of the uterus through the vaginal canal. This may be a predisposing factor to infections in the urogenital system. This study aimed to assess the endocervical swab microscopy, culture and sensitivity in patients with third degree uterovaginal prolapse at the National Obstetric Fistula Centre, Abakaliki, South-East Nigeria. Methodology: This is a cross-sectional prospective study to assess the endocervical swab microbial findings in patients with third degree uterovaginal prolapse using simple random sampling technique. Data on sociodemographic variables, risk factors for pelvic organ prolapse, and endocervical swab findings among women with third degree uterovaginal prolapse were collated and analysed using statistical methods. Results: The mean age and parity were 50.5 years ± 9.1 and 6.7 ± 2.0 respectively. Thirty-six (85.7%) of the clients were grandmultipara and 37 (88.1%) were farmers. Pus cells were present in all samples while 27 (64.3%) had microbial isolates. Streptococcus pyogenes was isolated in 7 (16.7%), Streptococcus faecalis in 5 (11.9%), Escherichia coli in 5 (11.9), Staphylococcus aureus in 4 (9.5%), Klebsiella pneumoniae in 2 (4.8%) and Yeast cells in 4 (9.5%) of the endocervical swabs. All isolates were sensitive to gentamicin. Bacterial isolates were resistant to amoxicillin/clavulanic acid. Conclusion: This study showed growth of pathogenic organisms from the endocervix of women with third degree uterovaginal prolapse. A 100% sensitivity to gentamicin was observed in the study. 展开更多
关键词 Uterovaginal PROLAPSE ENDOCERVICAL swab Microscopy Culture Sensitivity
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Visual Positioning of Nasal Swab Robot Based on Hierarchical Decision
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作者 李国志 邹水中 丁数学 《Journal of Shanghai Jiaotong university(Science)》 EI 2023年第3期323-329,共7页
This study focuses on a robot vision localization method for coping with the operational task ofautomatic nasal swab sampling. The application is important in the detection and epidemic prevention of CoronaVirus Disea... This study focuses on a robot vision localization method for coping with the operational task ofautomatic nasal swab sampling. The application is important in the detection and epidemic prevention of CoronaVirus Disease 2019 (COVID-19) to alleviate the large-scale negative impact of individuals suffering from pneumoniaowing to COVID-19. In this method, the idea of a hierarchical decision network is used to consider the stronginfectious characteristics of the COVID-19, which is followed by processing the robot behavior constraint condition.The visual navigation and positioning method using a single-arm robot for sampling is also planned, whichconsiders the operation characteristics of medical staff. In the decision network, the risk factor for potentialcontact infection caused by swab sampling operations is established to avoid the spread among personnel. A robotvisual servo control with artificial intelligence characteristics is developed to achieve a stable and safe nasal swabsampling operation. Experiments demonstrate that the proposed method can achieve good vision positioning forthe robots and provide technical support for managing new major public health situations. 展开更多
关键词 surgical robot nasal swab sampling vision servo hierarchical decision
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Association of the microbial culture of follicular fluid,vaginal swab and catheter tip with β-hCG IVF positive and negative
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作者 Manoj Chellani Manju Chellani Sandeep Rahangdale 《Asian pacific Journal of Reproduction》 2022年第5期217-222,共6页
Objective:To find out the association of microbial contamination withβ-human chorionic gonadotropin(β-hCG)in-vitro fertilization(IVF)positive and negative.Methods:A total of 73 fresh IVF cycle women were included in... Objective:To find out the association of microbial contamination withβ-human chorionic gonadotropin(β-hCG)in-vitro fertilization(IVF)positive and negative.Methods:A total of 73 fresh IVF cycle women were included in the retrospective study.Vaginal swab culture samples were collected prior to ovum pick-up and embryo transfer.The follicular fluids were collected during ovum pick-up and catheter tip culture samples were collected after successful embryo transfer.After 14 days of the embryo transfer,women were classified intoβ-hCG IVF positive and negative.The comparative statistical analyses of aerobic microbial culture reports were done betweenβ-hCG IVF positive and negative women.Results:Out of 73 women,42(57.5%)were found to beβ-hCG IVF positive and 31(43.5%)were negative.In the aerobic culture of ovum pick-up vaginal swab,follicular fluid,embryo transplantation vaginal swab and catheter tip,Enterococcus faecalis was found to be higher compared to other bacteria(Streptococcus spp.,Candida,Escherichia coli and Klebsiella).Regarding the comparison between IVF positive and negative,the overall microbial infection rate of vaginal swab culture during ovum pick-up and embryo transplantation was found to be higher in IVF negative women than in IVF positive women(38.71%vs.28.57%);however,it was not statistically significant(P>0.05).The follicular fluid and catheter tip culture microbial infection rate was found to slightly higher in IVF positive women than in IVF negative women(54.76%vs.41.94%and 19.05%vs.9.68%,respectively),but there were not significant differences(P>0.05).Conclusions:The aerobic microbial culture reports of follicular fluid,vaginal swab culture,and catheter tip culture are not statistically significantly withβ-hCG IVF positive. 展开更多
关键词 Follicular fluid culture Vaginal swab culture Catheter tip culture β-human chorionic gonadotropin In-vitro fertilization outcome
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COVID-19 Pandemic Waves in Italy: An Epidemiological Overview about Infections, Swabs and Death Rates
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作者 Agata Zirilli Francesco Limonti Angela Alibrandi 《Open Journal of Epidemiology》 2022年第3期285-299,共15页
Introduction: On March 11, 2020, the World Health Organization (WHO) declared that the entire World was overrun by a pandemic. Science has managed, in a short time, to characterize a new disease, sequence a new viral ... Introduction: On March 11, 2020, the World Health Organization (WHO) declared that the entire World was overrun by a pandemic. Science has managed, in a short time, to characterize a new disease, sequence a new viral genome, develop diagnostics, produce treatment protocols and establish the efficacy of drugs and vaccines in randomized controlled trials. In this paper we have dealt with different topics regarding the pandemic linked to COVID-19. Objectives: Aim of this paper is to compare the number of deaths attributable to COVID-19, that occurred in the different Italian macro-areas, in the different pandemic waves;we studied the trend of the curves relating to the proportion of deaths to the number of infected in the Italian macro-areas for the pandemic waves and analysed the mortality data, focusing on the Italian context and comparing it with other foreign countries. We examined the data regarding swabs, hospitalizations, home isolation, admissions to intensive care and deaths registered in pandemic period. Results: Geographically, Italy was differently affected by the pandemic. Northern Italy was the most affected area. In comparison with some foreign countries, Italy is one of the nations that paid the most in terms of deaths, due to: delays in understanding the seriousness of the emergency;the slow management in the tracking systems of contagions;the high number of hospitalizations;a corporate organizational system poorly planned. Conclusion: The years 2020 and 2021 have been dramatic and unprecedented. The year 2021 was the year of redemption, where, despite social, economic and health difficulties, thanks to mass vaccination, we were able to give a real strong response to the pandemic. Trust in science has led to a drastic decrease in mortality throughout the world. 展开更多
关键词 Statistical Analysis Comparisons swabS HOSPITALIZATIONS Death Rates
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Detection of Streptococci in the Throat Swabs from Upper Respiratory Tract Infections in Kurdistan Region
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作者 Aqeel Ismael Gheni 《Journal of Life Sciences》 2014年第3期283-289,共7页
The study was conducted for the detection of streptococcus bacteria of two groups of people with pharyngitis and tonsillitis. All the plates with α-haemolytic and β-haemolytic colonies were identified by conventiona... The study was conducted for the detection of streptococcus bacteria of two groups of people with pharyngitis and tonsillitis. All the plates with α-haemolytic and β-haemolytic colonies were identified by conventional methods. β-haemolytic colonies was further identified by observing its sensitivity towards bacitracin disc tested on sheep blood agar plate. Alpha-hemolytic colonies on blood agar plate were identified with optchin disc. Different bacteria which included Streptococcus pyogenes, S. agalactiae, S. pnenmoniae and S. celis that had proportions 48.57%, 51.43%, 59.1% and 40.9% respectively isolated by the sensitivity test (depends on agents bacitracin and optchin). Isolates of beta-Streptococcal which included S. pyogenes at child group (A) and the isolates alpha- Streptococcal which included S. pnenmoniae at adults group (B) showed marked rise. 展开更多
关键词 Group A streptococcus throat swab upper respiratory tract infection.
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Massive Rhinorrhea as a Complication of COVID-19 Nasopharyngeal Swab
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作者 Inas El Kacemi Yao Christian Hugues Dokponou +5 位作者 Fresnel Lutèce Ontsi Obame Moussa Elmi Saad Napoleao Imbunhe Salami Mohcine Abad Cherif El Asri Miloud Gazzaz 《Open Journal of Modern Neurosurgery》 2023年第3期145-148,共4页
The nasopharyngeal swab for COVID-19 testing is generally considered safe;however, it is primarily performed by staff that may not completely understand the anatomy of the nasal cavity and nasopharynx. We report the t... The nasopharyngeal swab for COVID-19 testing is generally considered safe;however, it is primarily performed by staff that may not completely understand the anatomy of the nasal cavity and nasopharynx. We report the treatment of a 48-year-old man who developed unilateral left rhinorrhea after a nasopharyngeal swab sample. It is aimed to draw attention to this complication that can be prevented with the appropriate technique during nasopharyngeal swab sampling. 展开更多
关键词 COVID-19 Testing Nasopharyngeal swab RHINORRHEA
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3M Quick Swab与常规涂抹棒使用效果的研究
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作者 李娟 刘燕燕 娄喜山 《中国食品工业》 2009年第12期61-62,共2页
[目的]比较3M Quick Swab与常规涂抹棒的使用效果。[方法]1、用大肠杆菌菌悬液模拟污染后的环境,然后用新洁尔灭进行消毒,用生理盐水、缓冲蛋白胨水(BPW)和3MQuick Swab使用的李肉汤(LetheenBroth)三种培养液的涂抹棒进行涂抹,观察不同... [目的]比较3M Quick Swab与常规涂抹棒的使用效果。[方法]1、用大肠杆菌菌悬液模拟污染后的环境,然后用新洁尔灭进行消毒,用生理盐水、缓冲蛋白胨水(BPW)和3MQuick Swab使用的李肉汤(LetheenBroth)三种培养液的涂抹棒进行涂抹,观察不同培养液对大肠菌群的检出效果;2、把含等量大肠杆菌的3M Quick Swab棉签和普通棉签同时放入生理盐水中,观察3MQuick Swab和普通棉签头对大肠菌群释放的稳定性和回收率。[结果]3MQuick Swab能够有效的中和消毒剂,修复受损的细胞,且对大肠菌群释放的稳定性好且回收率高。[结论]3M Quick Swab比普通的涂抹棒的使用效果好,更适用于消毒场所的涂抹实验。 展开更多
关键词 大肠菌群 去氧胆酸钠琼脂 3M Quick swab
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非靶向代谢组学揭示宫颈癌发展进程的特征代谢谱研究
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作者 翟青枝 马韵之 +5 位作者 叶明侠 王铭洋 李阳 李莉 孟元光 李立安 《中国病理生理杂志》 北大核心 2025年第2期230-238,共9页
目的:探讨宫颈病变过程中的代谢谱差异及其用于辅助诊断宫颈癌的潜在临床价值。方法:采用超高效液相色谱串联高分辨率质谱分析技术,对43例宫颈癌患者,34例高级别鳞状上皮内病变患者和43例健康对照人群的宫颈拭子样本进行了非靶向代谢组... 目的:探讨宫颈病变过程中的代谢谱差异及其用于辅助诊断宫颈癌的潜在临床价值。方法:采用超高效液相色谱串联高分辨率质谱分析技术,对43例宫颈癌患者,34例高级别鳞状上皮内病变患者和43例健康对照人群的宫颈拭子样本进行了非靶向代谢组学分析。在三组代谢谱均有明显特征的基础上,利用主成分分析法确定健康对照,高级别鳞状上皮内病变与宫颈癌之间的代谢差异,并使用Metabo Analyst 5.0对显著差异代谢物进行了KEGG通路富集分析。最后,通过随机森林机器学习构建区分宫颈癌与健康对照,高级别鳞状上皮内病变与健康对照和宫颈癌与高级别鳞状上皮内病变人群的分类预测模型,并通过ROC曲线评估模型效能。结果:健康对照、高级别鳞状上皮内病变和宫颈癌3组经过滤后共得到1543种代谢物,其中包含407个组间差异代谢物。研究发现内源代谢物PGE2同时存在于3组中,且其表达水平随宫颈病变的发展呈现逐步上升状态。差异代谢物富集分析显示宫颈癌具有特异的癌症相关代谢通路,包括三羧酸循环、酪氨酸代谢、色氨酸代谢、戊糖磷酸代谢等。研究基于代谢产物构建了3种可用于辅助诊断高级别鳞状上皮内病变和宫颈癌的预测模型,即全模型、简化模型和PGE2模型。结果表明代谢物具有良好的诊断效能,其中全模型及简化模型均可有效区分宫颈癌与高级别鳞状上皮内病变,宫颈癌与健康人群,以及高级别鳞状上皮内病变与健康人群。前者AUC值分别达到了0.90、0.92和0.84,后者AUC值分别达到了0.81、0.95和0.85。PGE2模型区分宫颈癌与健康对照,高级别鳞状上皮内病变与健康对照的AUC值分别是0.74和0.80。结论:宫颈癌的不同发展进程其代谢谱具有显著差异,且这些代谢物有成为宫颈病变生物标志物的潜在临床价值。 展开更多
关键词 宫颈癌 高级别鳞状上皮内病变 宫颈拭子 代谢谱 非靶向代谢组学
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基于舌拭子的结核分枝杆菌复合群核酸检测方法在肺结核诊断和筛查中的应用前景与挑战
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作者 夏辉 赵雁林 《中国防痨杂志》 北大核心 2025年第8期976-980,共5页
结核病仍然是全球面临的重大公共卫生问题。病原学检查是诊断结核病的重要手段,然而,部分疑似肺结核患者早期无痰或者难以获取合格痰标本,导致基于痰标本检测的实验室手段不能充分发挥作用。与此同时,基于口腔拭子、血液、尿液和体液等... 结核病仍然是全球面临的重大公共卫生问题。病原学检查是诊断结核病的重要手段,然而,部分疑似肺结核患者早期无痰或者难以获取合格痰标本,导致基于痰标本检测的实验室手段不能充分发挥作用。与此同时,基于口腔拭子、血液、尿液和体液等非痰标本的检查方法已成为结核病实验室诊断研发的热点。笔者就舌拭子在结核病诊断与筛查中的研究现状、存在的问题和挑战,以及需要关注的问题等进行系统分析,以期为相关技术优化、多场景应用试点等提供参考。 展开更多
关键词 结核 诊断 舌拭子 总结性报告
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河南省幼托机构儿童蛲虫病流行病学调查及不同采样器材检出率对比
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作者 陈伟奇 蒋甜甜 +6 位作者 马晓会 张雅兰 邓艳 许小利 崔士磊 王利波 宋传清 《热带医学杂志》 2025年第8期1120-1126,共7页
目的了解2019年河南省幼托机构儿童蛲虫感染情况及不同检测器材检出效率,为疾病防控提供依据。方法采取分层整群抽样的方法,分别从焦作市武陟县、濮阳市范县及南阳市新野县农村和城镇的幼托机构中随机抽取16所幼儿园开展调查。以幼托机... 目的了解2019年河南省幼托机构儿童蛲虫感染情况及不同检测器材检出效率,为疾病防控提供依据。方法采取分层整群抽样的方法,分别从焦作市武陟县、濮阳市范县及南阳市新野县农村和城镇的幼托机构中随机抽取16所幼儿园开展调查。以幼托机构内全部儿童为调查对象,连续2 d分别使用玻片透明胶纸和虫卵检测肛拭胶贴进行采样,检查儿童蛲虫感染情况。通过问卷调查儿童基本情况、卫生习惯、蛲虫病临床症状及其家庭卫生习惯、家长蛲虫病防治知识知晓情况等,计数资料比较采用χ^(2)检验。结果共调查幼托机构儿童1935名,蛲虫平均感染率为12.92%(250/1935),农村幼托机构儿童感染率高于城镇,差异有统计学意义(χ^(2)=87.537,P<0.05)。男、女童间感染率差异无统计学意义(χ^(2)=0.073,P=0.787)。大部分儿童及其家庭养成了良好的卫生习惯,56.23%(1088/1935)的儿童家长听说过蛲虫病。蛲虫感染率与儿童平时由谁来照看、中午是否在幼儿园休息、喝生水等个人及家庭卫生习惯、父母文化程度和职业、家长是否听说过蛲虫及家庭居住环境等因素相关,且随着儿童具有良好卫生习惯的数量增加而降低(χ^(2)=11.190,P=0.004;χ_(线性相关)^(2)=11.150,P=0.001)。在蛲虫感染率高于10%的儿童中,使用虫卵检测肛拭胶贴采样蛲虫阳性检出效率高于玻片透明胶纸,但在蛲虫感染率低于10%的儿童中无法确定2种采样器材检出效率的高低。结论河南省幼托机构儿童中存在一定程度的蛲虫病流行,儿童蛲虫感染与不良卫生习惯、家长文化程度等多种因素有关,虫卵检测肛拭胶贴儿童蛲虫感染平均检出效率高于玻片透明胶纸。 展开更多
关键词 蛲虫 儿童 幼儿园 虫卵检测肛拭胶贴 玻片透明胶纸
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Precautions for the characteristics of vaginal discharge for the tendency of genital infections
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作者 Ivanna Beru Brahmana Inayati Inayati Ana Majdawati 《Frontiers of Nursing》 2025年第3期317-323,共7页
Objective:To determine the relationship between the color of vaginal discharge and the volume of vaginal discharge and the types of microorganisms in the genital organs.Methods:Cross-sectional study by conducting vagi... Objective:To determine the relationship between the color of vaginal discharge and the volume of vaginal discharge and the types of microorganisms in the genital organs.Methods:Cross-sectional study by conducting vaginal swab examinations on 56 women with complaints of vaginal discharge in Bareng Lor Village,Klaten,and Sewugalur,Kulon Progo,Indonesia.A vaginal swab was carried out with a Gram examination.Data were coded and analyzed using the chi-c test.Results:The color of vaginal discharge was divided into:non-vaginal discharge 16.1%(9/56),white/clear/mucoid 50%(28/56),greenish/white 14.3%(8/56),brownish white/brown 3.6%(2/56),powdery and white 3.6%(2/56),post coitus bleeding 7.1%(4/56),and other complaints(itching,odor,erosion)5.4%(3/56).The volume of vaginal discharge was divided into:normal 16.1%(9/56),a little 48.2%(27/56),and a lot 35.7%(20/56).The types of microorganisms obtained were:no microorganisms growing 8.9%(5/56),Gram positive cocci/bacilli 7.1%(4/56),Gram negative cocci/bacilli 19.6%(11/56),Gram positive/negative coccobacilli 7.1%(4/56),growth of>2 bacteria 42.9%(24/56),and fungus/yeast cells/clue cells 14.3%(8/56).There is a significant relationship between volume and type of microorganisms(P=0.011),while the relationship between color/type of vaginal discharge and microorganisms is not significantly related.Conclusions:The volume of vaginal discharge reflects the presence of risky microorganisms. 展开更多
关键词 color of vaginal discharge MICROORGANISMS vaginal swab VOLUME genital infection
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基于group_3798基因的鸡白痢/鸡伤寒沙门氏菌PCR检测方法的建立及应用
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作者 王双娟 康喜龙 +6 位作者 杨燕娇 王新为 阮燕雨 孟闯 耿士忠 焦新安 潘志明 《中国家禽》 北大核心 2025年第7期40-46,共7页
为建立一种快速检测鸡白痢/鸡伤寒沙门氏菌的PCR方法,试验利用全基因组分析鸡常见血清型沙门氏菌,从中筛选鸡白痢/鸡伤寒沙门氏菌特异性基因group_3798,并针对该基因设计特异性引物建立PCR方法,测定该方法的特异性、敏感性、重复性和符... 为建立一种快速检测鸡白痢/鸡伤寒沙门氏菌的PCR方法,试验利用全基因组分析鸡常见血清型沙门氏菌,从中筛选鸡白痢/鸡伤寒沙门氏菌特异性基因group_3798,并针对该基因设计特异性引物建立PCR方法,测定该方法的特异性、敏感性、重复性和符合率,应用粪便模拟样品及感染鸡白痢沙门氏菌的雏鸡泄殖腔拭子进行检测。结果显示:在家禽沙门氏菌中,group_3798特异性存在于鸡白痢/鸡伤寒沙门氏菌基因组,建立的PCR方法能在鸡白痢沙门氏菌和鸡伤寒沙门氏菌特异性扩增出924 bp的目的条带,而其他血清型沙门氏菌和非沙门氏菌均无扩增条带;基因组与菌液浓度检测限分别为2.593 pg/μL和8 CFU/mL;与国家标准中所述方法相比,对鸡白痢沙门氏菌临床分离株的检测结果符合率为100%;鸡粪便模拟样品中可以特异性检测出鸡白痢沙门氏菌,未增菌培养时检测限为106 CFU/g;使用PCR方法和国家标准中所述方法同时检测鸡白痢沙门氏菌感染48 h后雏鸡泄殖腔样品,检测结果一致。研究表明,建立的PCR方法可用于鸡粪便和泄殖腔拭子样品中鸡白痢沙门氏菌的检测,为鸡白痢/鸡伤寒沙门氏菌的快速检测提供了新的方法。 展开更多
关键词 鸡白痢/鸡伤寒沙门氏菌 group_3798基因 PCR 粪便 泄殖腔拭子
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舌拭子-PCR荧光探针法对肺结核诊断效能的评价 被引量:2
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作者 陈纪飞 黄丽花 +3 位作者 罗兰波 眭文娴 逄宇 刘爱梅 《中国防痨杂志》 CAS 北大核心 2025年第1期51-60,共10页
目的:评估舌拭子-PCR荧光探针法(舌拭子法)的肺结核诊断效能,分析各肺结核诊断方法的一致性,探讨舌拭子法在肺结核诊断中的应用价值。方法:采用前瞻性研究,连续收集2024年1—3月在广西胸科医院就诊的疑似肺结核患者76例。记录患者临床... 目的:评估舌拭子-PCR荧光探针法(舌拭子法)的肺结核诊断效能,分析各肺结核诊断方法的一致性,探讨舌拭子法在肺结核诊断中的应用价值。方法:采用前瞻性研究,连续收集2024年1—3月在广西胸科医院就诊的疑似肺结核患者76例。记录患者临床症状及痰涂片、痰液GeneXpert MTB/RIF(Xpert)、结核感染T淋巴细胞斑点试验等实验室检查结果。舌拭子法使用结核分枝杆菌复合群核酸检测试剂盒。参考痰培养或复合微生物学标准(microbiological reference standard,MRS),通过基线比较、单变量ROC分析、变量相关性分析、Lasso回归和森林图,遴选高诊断效能参数、拟合肺结核诊断模型。通过一致性检验分析舌拭子法与Xpert、痰培养、痰涂片、MRS等肺结核诊断方法的差异。结果:参考痰培养,Xpert(χ^(2)=49.045,P<0.001)、舌拭子法(χ^(2)=42.626,P<0.001)、痰涂片(χ^(2)=17.443,P<0.001)在痰培养阳性和阴性组间差异有统计学意义,受试者工作特征曲线下面积(AUC)由大到小依次为Xpert(AUC=0.902)、舌拭子法(AUC=0.875)、痰涂片(AUC=0.709);模型拟合显示,Xpert联合舌拭子法为最优诊断模型;单变量ROC及ROC对比分析显示,Xpert优于舌拭子法(AUC分别为0.902和0.875,敏感度分别为87.10%和83.87%,特异度分别为93.33%和91.11%,P值均<0.001),但差异无统计意义(Z=0.795,P=0.427)。参考MRS,舌拭子法(χ^(2)=46.723,P<0.001)、痰涂片(χ^(2)=23.262,P<0.001)在MRS阳性和阴性组间差异均有统计学意义,AUC由大到小依次为舌拭子法(AUC=0.888)、痰涂片(AUC=0.738);模型拟合遴选舌拭子法为最优诊断模型;单变量ROC及ROC对比分析显示,舌拭子法明显优于痰涂片(AUC分别为0.888和0.738,敏感度分别为82.35%和50.00%,特异度分别为95.24%和97.62%,P值均<0.001),两者差异有统计学意义(Z=2.889,P=0.004)。舌拭子法与MRS(Kappa=0.7847)和Xpert(Kappa=0.8348)一致性均较高,且与Xpert各分层的一致性好,总体一致率为92.11%。结论:无论是以痰培养还是MRS作为标准,舌拭子法都展现出不逊于Xpert检测的诊断效能,远优于痰涂片法,提示舌拭子法已是一种具备较大潜力的肺结核诊断方法。 展开更多
关键词 舌拭子 分枝杆菌 结核 聚合酶链反应 评价研究 数据说明 统计
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智能口咽拭子采样机器人现场应用评价
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作者 秦硕 王莹 +8 位作者 刘利 熊怡 田勇 王雪清 熊衍文 李少强 周承志 王晓玲 刘志贞 《检验医学》 2025年第1期90-95,共6页
目的评价智能口咽拭子采样机器人(简称机器人)进行现场人群口咽拭子采样的有效性和准确性,分析可能影响机器人采样结果的相关因素。方法招募168名参加现场机器人采样的山西医科大学在校师生,其中52名同时进行人工和机器人采样,其余116... 目的评价智能口咽拭子采样机器人(简称机器人)进行现场人群口咽拭子采样的有效性和准确性,分析可能影响机器人采样结果的相关因素。方法招募168名参加现场机器人采样的山西医科大学在校师生,其中52名同时进行人工和机器人采样,其余116名仅进行机器人采样。收集受试者基本信息和采样舒适度调查问卷。采用实时荧光定量聚合酶链反应(PCR)进行新型冠状病毒、甲型流感病毒、乙型流感病毒、呼吸道合胞病毒、腺病毒、人鼻病毒、肺炎支原体核酸检测,比较2种采样方式不同基本特征受试者PCR检测结果差异。结果机器人采样样本内标循环阈值(Ct)(29.5±1.8)<人工采样样本内标Ct值(30.4±2.0),差异有统计学意义(P<0.05);女性受试者和高身高受试者2种采样方式的样本内标Ct值差异有统计学意义(P<0.05)。2种采样方式新型冠状病毒、甲型流感病毒、乙型流感病毒、呼吸道合胞病毒、腺病毒、人鼻病毒、肺炎支原体核酸检测结果差异均无统计学意义(P>0.05)。调查问卷统计结果显示,168名受试者中,接受机器人采样无咽部刺激反应者占72%;不同性别、身高受试者接受机器人采样后有无咽部刺激反应和采样舒适度评价差异均无统计学意义(P>0.05)。受试者的性别、身高与其接受机器人采样产生的咽部刺激反应和采样舒适度无相关性(P>0.05)。结论机器人可针对不同人群开展标准化采样;在保证样本质量的前提下,采样过程可避免交叉感染。 展开更多
关键词 智能口咽拭子采样机器人 呼吸道传染病 口咽拭子 病原体核酸检测 现场应用
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直肠拭子与粪便取样两种途径采集的标本中肠道微生物群组成及功能对比分析
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作者 李艳辉 张汤安苏 +2 位作者 陈锦华 余舒扬 汪宏波 《华中科技大学学报(医学版)》 北大核心 2025年第5期617-625,共9页
目的 通过对比分析来自健康受试者匹配的直肠拭子和粪便取样标本的微生物群,探讨直肠拭子是否可以作为肠道微生物群研究中可靠的替代粪便取样的标本采集方法。方法 纳入15名健康女性受试者,同时获取其直肠拭子和粪便取样标本;采用16S r... 目的 通过对比分析来自健康受试者匹配的直肠拭子和粪便取样标本的微生物群,探讨直肠拭子是否可以作为肠道微生物群研究中可靠的替代粪便取样的标本采集方法。方法 纳入15名健康女性受试者,同时获取其直肠拭子和粪便取样标本;采用16S rRNA的V3~V4高变区基因进行DNA测序,并经生物信息学分析对比两组采集方法所获标本在微生物群组成、多样性、丰度及功能上的差异。结果 直肠拭子获取标本所提取的DNA浓度明显低于粪便取样标本[8.0(6.4,9.4)vs.112.1(82.6,150.0)ng/μL,P<0.001],但两种方法采集得到的标本在测序数据读长、扩增子序列变异总数上并无差异(均P>0.05)。生物信息学分析结果显示,直肠拭子与粪便取样两组标本在微生物群组成及差异分析上无显著差异(均P>0.05);两组标本在α多样性指标(Shannon指数[3.392(3.465,3.332)vs.2.793(2.660,3.009),P=0.064];Simpson指数[0.070(0.062,0.088)vs.0.126(0.100,0.188),P=0.253])、β多样性指标[加权UniFrac距离(P=0.700)]的差异均无统计学意义。此外,直肠拭子与粪便取样两组标本微生物群在COG功能注释和KEGG level 1、level 2生物学通路上也未显示出差异(均P>0.05)。结论 直肠拭子获取的标本在肠道微生物群组成、多样性及功能上与粪便取样标本具有高度一致性,可作为粪便取样的替代采集方法用于肠道微生物群研究。 展开更多
关键词 肠道微生物群 直肠拭子 粪便标本 取样方法 组成分析 多样性分析
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某小学一起人鼻病毒感染暴发疫情流行病学调查
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作者 李雪秋 蒋瑾 +3 位作者 吴迪 刘艳慧 王大虎 刘群 《热带医学杂志》 2025年第8期1131-1134,共4页
目的分析某小学一起人鼻病毒感染所致暴发疫情的流行病学特征,为鼻病毒防控提供科学依据。方法对2020年6月15日某小学的呼吸道传染病疫情进行现场流行病学调查,并采集病例咽拭子标本进行新冠病毒、流感及呼吸道多病原体检测。结果累计报... 目的分析某小学一起人鼻病毒感染所致暴发疫情的流行病学特征,为鼻病毒防控提供科学依据。方法对2020年6月15日某小学的呼吸道传染病疫情进行现场流行病学调查,并采集病例咽拭子标本进行新冠病毒、流感及呼吸道多病原体检测。结果累计报告55例病例,男性26例,女性29例,年龄中位数为9岁,所有患者均发热(100.00%),其中咽痛25例(45.45%),流涕20例(36.36%),咳嗽14例(25.45%),打喷嚏7例(12.73%),全身酸痛3例(5.45%),头痛2例(3.64%),眼结膜充血1例(1.82%)。采集上述病例咽拭子12份,其中9份鼻病毒阳性,新冠病毒及其他呼吸道传染病病毒阴性。结论本起聚集性疫情为鼻病毒感染所致,在新冠肺炎疫情防控的背景下需注意其他呼吸道传染病的防控。 展开更多
关键词 鼻病毒 暴发疫情 小学 咽拭子
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基于YOLO和有限状态机的咽拭子机器人仿真
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作者 王亦雷 王兴 +1 位作者 荀亚玲 王宁 《计算机仿真》 2025年第5期288-296,共9页
为改进当前咽拭子机器人存在的口咽检测精确率低、智能程度不高等问题,提出了一种基于YOLO和有限状态机的咽拭子机器人。首先,构建了口咽图像数据集,测试并选择了最优的YOLO算法。然后,在YOLOX中增加了注意力机制、在PPYOLOE中修改了分... 为改进当前咽拭子机器人存在的口咽检测精确率低、智能程度不高等问题,提出了一种基于YOLO和有限状态机的咽拭子机器人。首先,构建了口咽图像数据集,测试并选择了最优的YOLO算法。然后,在YOLOX中增加了注意力机制、在PPYOLOE中修改了分类损失和边界框损失函数、在YOLOv6中更换了backbone内模块,提高了模型的特征提取能力和检测效果,并设计了基于投票法的联合检测机制,选择多数模型检测到的结果,用于降低模型的误检率。其次,设计了基于检测框的咽拭子采样轨迹,为机械臂提供采样轨迹。最后,构建了基于有限状态机的智能系统,实现了机器人的自主控制和异常处理。经过仿真及实验,联合检测机制的口咽检测的精确率达到69%,误检率降低到0.53%,且智能系统具备可行性。 展开更多
关键词 目标检测 机械臂 有限状态机 咽拭子
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