Effect of"Fuzheng Qingretonglin"decoction on complex urinary tract infection in rats by regulating NLRP3 inflammasome pathway

Obiective:To investigate whether"Fuzheng Qingretonglin"decoction can reduce urinary tract damage caused by complex urinary tract infection caused by drug resistant Escherichia coli by regulating Nod-like receptor pyrin domain3 inflammasome,and to explore the feasibility of this decoction combined with levofloxacin in the treatment of complex urinary tract infection caused by drug resistant bacteria.Methods:SD rats were divided into five groups:sham group,model group,levofloxacin group(Lev group),levofloxacin+Fuzheng Qingre Tonglin decoction group(FZ+lev group),and Fuzheng Qingre Tonglin decoction group(FZQRTL group).After the experiment,urine was taken for bacterial culture to determine the urinary tract infection of rats in each group;HE staining was used to observe the pathological changes of kidney and bladder tissues in rats;The expression of NLRP3 in kidney and bladder tissues was detected by immunohistochemistry;The expression of IL-1βand IL-18 in serum of rats was detected by ELISA;The expressions of NLRP3,ASC and Caspase-1 were detected by Western blotting.Results:The positive rate of urine bacteria culture in the sham group was 0%,the positive rate of urine bacteria culture in the model group was 100%;and the positive rate of urine bacteria culture in the FZ+lev group was 37.50%,which was statistically different from that in the model group(P<0.05).A large number of inflammatory cells were observed in the kidney and bladder tissues of the model group by HE staining,while the number of inflammatory cells in the kidney and bladder tissues of the Lev group and FZQRTL group was significantly reduced compared with that of the model group.The FZ+lev group in the number and structure of inflammatory cells in kidney and bladder were similar to the sham group.The NLRP3 immunohistochemistry of kidney and bladder tissue in FZ+lev groups and FZQRTL groups was significantly different from that in model group(P<0.001).The levels of IL-1βand IL-18 in serum of Lev group,FZQRTL group and FZ+lev group were significantly decreased by ELISA compared with model group(P<0.001).The levels of IL-1βand IL-18 in the FZ+lev groups were significantly lower than in the Lev group and FZQRTL group,and the differences were statistically significant(P<0.05).The protein expressions of NLRP3,ASC and Caspase-1 in the Lev group,FZQRTL group and FZ+lev group were significantly lower than those in the model group(P<0.001).The protein expressions of NLRP3,ASC and Caspase-1 in the FZ+lev groups were significantly lower than in the Lev group and FZQRTL group,and the differences were statistically significant(P<0.05).Conclusions:"Fuzheng Qingretonglin"decoction may have a protective effect on the kidney and bladder of rats with complex urinary tract infection caused by drug-resistant Escherichia coli by inhibiting the activation of NLRP3 inflammatory bodies,and TCM combined with levofloxacin has a better therapeutic effect than TCM or levofloxacin alone.

Low Concentration of Wenyang Tonglin Decoction Promotes Conjugation and Transfer of Drug-Resistant Plasmids among Heterologous Strains

Objective To investigate the effect of low concentration of Wenyang Tonglin Decoction(WTD)on the binding conditions of R45 plasmid conjugative transfer under liquid phase conjugation and its mechanism.Methods Escherichia coli CP9(R45)and Staphylococcus aureus RN450RF were cultured in medium containing WTD,and their minimum inhibitory concentration(MIC)values were obtained.Using promoter fusion technology,E.coli CP9(R45)containing a promoter fusion was obtained.β-Galactosidase activity of TrfAp and TrbBp was tested,and the mRNA expression of regulatory factors(TrbA,KorA,and KorB)was detected by real-time fluorescent quantitative polymerase chain reaction.Results The MIC of E.coli CP9(R45)was 400 g/L and that of S.aureus RN450RF was 200 g/L.When the drug concentration in the culture medium was 200 g/L,the highest number of conjugants was(3.47±0.20)×10^(7) CFU/mL At 90 h of conjugation,the maximum number of conjugants was(1.15±0.06)×10^(8) CFU/mL When the initial bacterial concentration was 10^(8) CFU/mL,the maximum number of conjugants was(3.47±0.20)×10^(7) CFU/mL.When the drug concentration was 200 g/L,theβ-galactosidase activity of TrfAp and TrbBp significantly increased;the relative quantification of TrbA,KorA and KorB were significantly inhibited.Conclusion Low concentration of WTD promoted the development of bacterial resistance by affecting promoters and inhibiting the expression of regulatory factors.

Drug-resistant genes carried by Acinetobacter baumanii isolated from patients with lower respiratory tract infection

Background Acinetobacter baumanii （A. baumanii ） remains an important microbial pathogen resulting in nosocomialacquired infections with significant morbidity and mortality. The mechanism by which nosocomial bacteria, like A. baumanii, attain multidrug resistance to antibiotics is of considerable interest. The aim in this study was to investigate the spread status of antibiotic resistance genes, such as multiple 13-1actamase genes and aminoglycoside-modifying enzyme genes, from A. baumanii strains isolated from patients with lower respiratory tract infections （LRTIs）. Methods Two thousand six hundred and ninety-eight sputum or the bronchoalveolar lavage samples from inpatients with LRTIs were collected in 21 hospitals in the mainland of China from November 2007 to February 2009. All samples were routinely inoculated. The isolated bacterial strains and their susceptibility were analyzed via VITEK-2 expert system. Several kinds of antibiotic resistant genes were further differentiated via polymerase chain reaction and sequencing methods. Results Totally, 39 A. baumanii strains were isolated from 2698 sputum or bronchoalveolar lavage samples. There was not only a high resistant rate of the isolated A. baumanfi strains to ampicillin and first- and second-generation cephalosporins （94.87%, 100% and 97.44%, respectively）, but also to the third-generation cephalosporins （ceftriaxone at 92.31%, ceftazidine at 51.28%） and imipenem （43.59%） as well. The lowest antibiotic resistance rate of 20.51% was found to amikacin. The OXA-23 gene was identified in 17 strains of A. baumanii, and the AmpC gene in 23 strains. The TEM-1 gene was carried in 15 strains. PER-1 and SHV-2 genes were detected in two different strains. Aminoglycoside-modifying enzyme gene aac-3-1a was found in 23 strains, and the aac-6＂lb gene in 19 strains, aac-3-1a and aac-6＂lb genes hibernated in three A. baumanfi strains that showed no drug-resistant phenotype. Conclusions A. baumanii can carry multiple drug-resistant genes at the same time and result in multi-drug resistance. Aminoglycoside-modifying enzyme genes could be hibernating in aminoglycoside sensitive strains without expressing their phenotype.

268例多发性骨髓瘤患者感染情况的分析

目的:探讨多发性骨髓瘤(MM)患者感染的临床特点。方法:对2015年3月至2016年8月268例MM住院患者的临床资料进行回顾性分析。结果:216例非感染入院MM患者中42例患者发生医院感染,感染发生率为19.4%。感染部位以呼吸道为主(占59.2%);培养的病原体中革兰阴性杆菌占35.3%,真菌占35.3%(均为白假丝酵母菌),革兰阳性球菌占23.5%。并发社区感染入院MM患者有52例,同样以呼吸道感染为主(占77.8%);培养的病原体,革兰阳性球菌占37%,革兰阴性杆菌占40.7%,真菌占18.5%。入院时高ECOG评分(≥2分)、低白蛋白血症是骨髓瘤患者发生医院感染的高危因素。结论:MM患者免疫力低下,发生医院感染风险大,感染与多种因素有关。通过合理使用抗生素以及预见性的防控手段,可对感染的控制有益,能减少医院感染发生和减轻感染强度。

糖尿病足多重耐药菌感染分析及控制策略

目的了解某三级甲等综合医院内分泌科糖尿病足患者多重耐药菌感染的病原体分布情况，规范接触隔离和护理管理的相关防控措施。方法2013年1月-12月期间微生物室及医院感染控制中心每日将糖尿病足创面分离出的多重耐药菌报告送至内分泌科，科室落实接触隔离等防控措施，并对糖尿病足创面分离出的细菌进行分析。结果在送检的191份糖尿病足创面分泌物中分离出细菌203株，其中多重耐药菌共108株，多重耐药菌检出率为53．20％。多重耐药菌特殊耐药分析中，MRSA、产ESBL的大肠埃希菌检出最多（均为9株）。结论内分泌科因糖尿病足患者的收治，导致其多重耐药菌感染发病率高，特殊耐药菌感染的患者也较多．应采取切实可行的接触隔离和护理措施加以管理，控制医院感染的发生。

不动杆菌医院内感染的耐药性分析

目的探讨不动杆菌医院感染的临床状况、病原菌分类及耐药现状。方法对2001年1月～2004年10月医院感染病案进行统计分析,并用VITEKCC4全自动微生物分析系统,对从临床感染标本中分离的284株不动杆菌进行鉴定和药物敏感试验。结果不动杆菌的医院感染以鲍曼不动杆菌为主,占75.4%,其次分别为醋酸钙不动杆菌占13.7%,洛菲不动杆菌占9.8%,溶血不动杆菌占1.1%。对不动杆菌最有效的抗生素顺序为:亚安培南、阿米卡星、哌拉西林/他唑巴坦。鲍曼不动杆菌对抗生素的敏感性低于其他不动杆菌。结论不动杆菌医院内感染及耐药性呈上升趋势,鲍曼不动杆菌是医院常见病原菌之一,并具多重耐药特性。

一株粪肠球菌噬菌体的分离及其生物学特性研究

目的:利用临床耐药粪肠球菌分离裂解性噬菌体,为应用噬菌体治疗耐药粪肠球菌感染提供基础。方法:利用噬菌斑实验分离噬菌体并观察噬菌斑形态;双层平板培养法测定噬菌体效价、最佳感染复数及一步生长曲线;负染法电镜观察噬菌体形态;蛋白酶K/SDS法提取噬菌体基因组,酶切处理后琼脂糖凝胶电泳分析。结果:分离出一株噬菌体IME-EF1,该噬菌体能裂解多株临床分离的粪肠球菌;电镜观察呈蝌蚪形,最佳感染复数为1;通过绘制一步生长曲线,证明该噬菌体感染后的潜伏期为25 min,爆发期为35 min,裂解量为60 pfu。结论:研究结果表明利用临床分离的耐药粪肠球菌分离裂解性噬菌体是可行的,有望为耐药粪肠球菌的抗生素替代疗法奠定基础。

H1N1流感病毒在微载体培养MDCK细胞上增殖的研究

目的探索MDCK细胞在微载体上的培养条件,并研究H1N1型流感病毒在MDCK细胞上的增殖条件。方法在微载体上培养好MDCK细胞上用H1N1型流感病毒在不同的病毒感染复数(MOI)、胰酶浓度两个关键的病毒增殖条件进行流感病毒在细胞上的增殖研究。结果微载体质量浓度为6 g/L时,MDCK细胞培养密度可以达到4.5×106cells/mL。在MOI为0.05接种流感病毒,胰酶质量浓度4μg/mL,流感病毒在MDCK细胞上可获得较高的滴度。结论 MDCK细胞用微载体培养可以达到较高的细胞密度,可以作为规模化生产新型流感病毒疫苗的主要细胞基质进行进一步的研究。

HPV检测在宫颈癌前病变中的意义

流行病学显示,高危型人乳头瘤病毒（HPV）感染是宫颈癌及宫颈癌前病变的主要病因.高危型人乳头瘤病毒的持续感染、多重感染对宫颈癌前病变起到了强烈的预警作用,高危型人乳头瘤病毒检测联合细胞学检查能更加有效地筛查宫颈癌前病变治疗后有无复发或病变残留.该文就高危型人乳头瘤病毒持续感染、多重感染与宫颈癌前病变的关系及高危型人乳头瘤病毒检测在宫颈癌前病变治疗后随访中的意义作以综述.

多发性骨髓瘤并发上消化道侵袭性念珠菌病2例报道及文献复习

目的探讨多发性骨髓瘤(Multiple myeloma,MM)并发上消化道侵袭性念珠菌病的临床特点,提高诊治该病的水平。方法回顾分析我科2例多发性骨髓瘤并发上消化道侵袭性念珠菌病的诊治过程,分析、总结治疗经验,并结合文献复习骨髓瘤并发上消化道侵袭性念珠菌感染的易感因素、临床表现、诊断和鉴别诊断及治疗。结果 MM患者1,女性,异基因造血干细胞移植术后4个月发生腹泻伴腹部隐痛,抗移植物抗宿主病(graftversus host disease,GVHD)治疗无效,经胃镜诊断上消化道念珠菌病,予卡泊芬净治愈出院。MM患者2,男性,化疗过程中疾病进展,并出现腹胀、腹痛,对症处理改善,再次化疗时上述症状加重并发肺部念珠菌病,发生急性心、肾功能不全,经胃镜诊断上消化道念珠菌病,予伊曲康唑、米卡芬净治疗,最终因肺部真菌感染加重,治疗无效死亡。结论多发性骨髓瘤并发上消化道侵袭性念珠菌病易发生误诊、漏诊。临床医生需提高对该病的认识,首选电子胃镜明确诊断、判断疗效。

严重多发伤院内急救模式的效果探讨

目的探讨严重多发伤院内急救模式的效果。方法比较2010年6月至2012年6月采用新模式（A组）与传统模式（B组）救治严重多发伤患者急诊术前时间、漏诊、病死率、平均住院天数与并发症情况。结果A组患者创伤后得到有效救治的时间为（16．8±8．5）min，B组为（57．2±11．9）min，差异有统计学意义（t=2．66，P〈0．01）。A组病死1例（3．4％），致残7例（24．1％）；B组病死3例（9．7％），致残16例（51．6％）；两组患者的病死率与致残率差异有统计学意义（P〈0．05）。结论新急救模式有效提高了严重多发伤患者的救治水平，使患者的病死率和致残率明显降低。

颈部多间隙重症感染患者的综合治疗及护理

目的探讨颈部多间隙重症感染患者的治疗及护理。方法回顾分析收治的多例颈部多间隙重症感染患者的临床表现和临床实践,对该类患者实施全面系统的护理。结果经过精心治疗护理,患者全部痊愈出院。结论对颈部多间隙重症感染患者的护理要有针对性,观察患者临床表现,加强患者心理护理、口腔护理、饮食护理,协助医生做好创面引流护理,康复期加强健康教育。实施全面系统的护理,才能确保诊疗效果,提高患者护理质量。

Silver nanoparticles-decorated and mesoporous silica coated single-walled carbon nanotubes with an enhanced antibacterial activity for killing drug-resistant bacteria

The mounting threat of antibiotic-resistant bacterial infections has made it imperative to develop innovative antibacterial strategies.Here we propose a novel antibacterial nanoplatform of silver nanoparticles-decorated and mesoporous silica coated single-walled carbon nanotubes constructed via a N-[3-(trimethoxysiltyl)propyl]ethylene diamine(TSD)-mediated method(SWCNTs@mSiO2-TSD@Ag).In this system,the outer mesoporous silica shells are able to improve the dispersibility of SWCNTs,which will increase their contact area with bacteria cell walls.Meanwhile,the large number of mesopores in silica layers act as microreactors for in situ synthesis of Ag NPs with controlled small size and uniform distribution,which induces an enhanced antibacterial activity.Compared with TSD modified mesoporous silica coated single-walled carbon nanotubes(SWCNTs@mSiO2-TSD)and commercialAg NPs,this combination nanosystem of SWCNTs@mSiO2-TSD@Ag exhibits much stronger antibacterial performance against multi-drug-resistant bacteria Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)in vitro through damaging the bacterial cell membranes and a fast release of silver ions.Furthermore,the in vivo rat skin infection model verifies that SWCNTS@mSiO2-TSD@Ag have remarkably improved abilities of bacterial clearance,wound healing promoting as well as outstanding biocompatibility.Therefore,this novel nanoplatform indicates promising potentials as a safe and powerful tool for the treatment of clinical drug-resistant infections.

Ultrasmall Ga-ICG nanoparticles based gallium ion/photodynamic synergistic therapy to eradicate biofilms and against drug-resistant bacterial liver abscess

Pyogenic liver abscess and keratitis are aggressive bacterial infections and the treatment has failed to eradicate bacteria in infectious sites completely owing to the currently severe drug resistance to existing antibiotics.Here,we report a simple and efficient one-step development of ultrasmall non-antibiotic nanoparticles(ICG-Ga NPs)containing clinically approved gallium(Ⅲ)(Ga^(3+))and liver targeting indocyanine green(ICG)molecules to eradicate multi-drug resistant(MDR)bacteria thought the synergetic effect of photodynamic therapy and iron metabolism blocking.The ICG-Ga NPs induced photodynamic effect could destroy the bacterial membrane,further boost the endocytosis of Ga^(3+),then replace iron in bacteria cells to disrupt bacterial iron metabolism,and demonstrate the synergetic bacterial killing and biofilm disrupting effects.The ICG-Ga NPs show an excellent therapeutic effect against extended spectrumβ-lactamases Escherichia coli(ESBL E.coli)and significantly improve treatment outcomes in infected liver abscess and keratitis.Meanwhile,the ultrasmall size of ICG-Ga NPs could be cleared rapid via renal clearance route,guaranteeing the biocompatibility.The protective effect and good biocompatibility of ICG-Ga NPs will facilitate clinical treatment of bacteria infected diseases and enable the development of next-generation non-antibiotic antibacterial agents.

ICU下呼吸道多重耐药菌感染的危险因素和死亡因素分析

目的:分析急诊ICU和综合ICU患者下呼吸道感染多重耐药菌的分布、耐药情况、易感因素及死亡因素。方法:回顾性分析2014年1月~2016年12月芜湖市第二人民医院急诊ICU、综合ICU收治的104例确诊为下呼吸道感染且细菌培养阳性的患者资料,根据痰标本的检验结果分为多重耐药组(MDR组)和非多重耐药组(非MDR组)。观察多重耐药菌感染的构成情况和耐药情况,分析可能导致多重耐药菌感染的危险因素,并对多重耐药组患者临床转归进行多因素Logistic回归分析。结果:104例下呼吸道感染患者痰标本检出多重耐药菌71株(68.27%),其中革兰阳性菌6株(8.45%),革兰阴性菌65株(91.55%)。前5位的多重耐药菌依次是鲍曼不动杆菌、肺炎克雷伯菌、铜绿假单胞菌、嗜麦芽黄单胞菌及大肠埃希菌。患者感染前应用抗菌药物种类、抗菌药物时间、合并慢性肺部疾病、脑卒中和有创机械通气≥7 d是多重耐药菌感染的危险因素,APACHEⅡ评分>19.5分、SOFA评分>7分、抗生素的种类是多重耐药菌感染患者死亡的独立危险因素。结论:急诊和综合ICU患者下呼吸道多重耐药菌感染发生率较高,预后较差,应根据患者的危险因素,预防和减少肺部多重耐药菌感染的发生,并根据药敏结果合理选择抗菌药物。

Tuberculosis infection prevention and control:why we need a whole systems approach

Infection prevention and control(IPC)measures to reduce transmission of drug-resistant and drug-sensitive tuberculosis(TB)in health facilities are well described but poorly implemented.The implementation of TB IPC has been assessed primarily through quantitative and structured approaches that treat administrative,environmental,and personal protective measures as discrete entities.We present an on-going project entitled Umoya omuhle(“good air”),conducted in two provinces of South Africa,that adopts an interdisciplinary,‘whole systems’approach to problem analysis and intervention development for reducing nosocomial transmission of Mycobacterium tuberculosis(Mtb)through improved IPC.We suggest that TB IPC represents a complex intervention that is delivered within a dynamic context shaped by policy guidelines,health facility space,infrastructure,organisation of care,and management culture.Methods drawn from epidemiology,anthropology,and health policy and systems research enable rich contextual analysis of how nosocomial Mtb transmission occurs,as well as opportunities to address the problem holistically.A‘whole systems’approach can identify leverage points within the health facility infrastructure and organisation of care that can inform the design of interventions to reduce the risk of nosocomial Mtb transmission.

Application of ozonated water for treatment of gastro-thoracic fistula after comprehensive esophageal squamous cell carcinoma therapy: A case report

BACKGROUND Gastro-thoracic fistula is a serious complication after radical surgery for esophageal cancer,and a conservative approach or endoscopic intervention is commonly applied to treat most cases.CASE SUMMARY Here we describe the case of a patient with a gastro-thoracic fistula which could not be closed during gastroscopy after receiving postoperative radiotherapy,together with severe multiple drug-resistant bacterial infection and chest wall fistula.The abscess was drained and local irrigation applied with ozonated water,together with oral ozonated water,which achieved a good effect and highlighted a new way to cure fistula in such patients.CONCLUSION Patients with gastro-thoracic fistula that cannot be closed and severe infection can be treated by drainage and flushing with ozonated water.

儿童巨细胞病毒肺炎伴多器官损害的临床特点分析

目的：探讨儿童巨细胞病毒（CMV）肺炎伴多脏器损害的临床特点。方法：对120例儿童巨细胞病毒（CMV）肺炎伴多器官损害儿童的临床资料进行回顾性分析。结果：120例儿童CMV肺炎中80例（66.7%）为婴儿（0~1岁）；临床以低热、咳嗽、喘息、呼吸困难为主要表现，肺部体征不明显；92例肺外器官损害中，1岁以下婴儿72例（78.3%），1~3岁14例（15.2%），〉3岁6例（6.5%）；多器官损害以消化、血液、心血管系统多见，分别为87.0%、27.2%、26.1%；更昔洛韦（GCV）治疗后，痊愈102例（85.0%），好转18例（15.0%）。辅助检查：120例患儿血清CMV-IgM均阳性且CMV-DNA定量检测阳性。85例（70.8%）胸部X线以肺间质改变为主。结论：儿童巨细胞病毒肺炎多发生在1岁以内，其临床症状、体征及胸部X线缺乏特异性，常伴肺外器官受损，易误诊误治，采用更昔洛韦治疗安全有效。

海口地区4037例健康体检女性HPV亚型感染的研究

目的探讨海口地区女性宫颈上皮23种人乳头瘤病毒（human papillomavirus, HPV）的亚型感染情况，及其与年龄、细胞学结果的关系。方法以2013年7月至2016年8月我院体检中心的4 037例当地女性体检者为研究对象（其中1 967例有宫颈细胞学诊断结果），采用PCR-反向点杂交法对其宫颈脱落细胞进行HPV分型检测。结果（1）4 037例样本的HPV总阳性率为22.15%（894例），致癌型、可能致癌型及非致癌型HPV的检出率分别为16.13%、3.99%及5.55%（分别为651、161及224例），阳性率最高的6种基因型依次是HPV52、53、81、51、16及58。（2）致癌型、可能致癌型HPV及部分基因型（HPV18、52、53、66）的检出率均随年龄增长有增高趋势（均P〈0.05）。（3） HPV阳性者中多重感染占24.38%（218/894），其中单纯致癌型的多重感染率随年龄增长呈下降趋势，致癌型HPV的感染型别数与年龄负相关（均P〈0.05）。（4）细胞学阳性（≥ASC-US）者仅占2.49%（49/1967），8种致癌型与2种可能致癌型HPV在≥ASC-US组中的检出率明显高于阴性（NILM）组（均P〈0.05）。结论海口女性HPV感染率较高，感染高峰出现在高龄组；亚型感染有一定的地域特点，感染类型以单一感染为主；人群宫颈癌筛查应联合HPV与细胞学检查以提高有效性。

隐匿管状线虫分子鉴定和国内实验动物感染调查

目的:对无特定病原体(specific pathogen-free,SPF)和清洁级实验动物隐匿管状线虫进行分子鉴定和感染调查,为实验动物国家标准的修订提供参考依据。方法:4 649只SPF实验动物(包括小型猪25只,猴5只,兔40只,地鼠296只,豚鼠186只,大鼠438只,小鼠3 629只,鸡25只,鸭5只)和1 304只清洁级实验动物(包括兔3只,地鼠26只,豚鼠147只,大鼠229只,小鼠897只)来自全国不同的厂家。应用直接镜检实时动态显微视屏摄录技术,对实验动物的隐匿管状线虫进行筛查。应用多重聚合酶链式反应(PCR)和测序技术,鉴定分离自实验动物的隐匿管状线虫cox 1(细胞色素C过氧化物酶亚基1)、cyt b(细胞色素b)、nad 1(NADH脱氢酶亚单位1)、nad 5(NADH脱氢酶亚单位5)、rrn L(核糖体RNA大亚基)和28S r RNA(28S核糖体RNA)基因,从分子水平上确证隐匿管状线虫感染。结果:应用直接镜检实时动态显微视屏摄录技术,从实验动物中检出数量众多隐匿管状线虫的虫卵、幼虫和成虫。根据隐匿管状线虫的卵细胞、幼虫、雌雄成虫的大小和形态来鉴定虫种。应用多重PCR测序技术,能从分离自实验动物的单个隐匿管状线虫的虫卵、幼虫和成虫中鉴定出cox 1、cyt b、nad 1、nad 5、rrn L和28S r RNA基因,与其他不同种属的寄生虫无交叉反应。在研究中,通过对确定的阳性样本测序保证了引物的特异性,探究了隐匿管状线虫分离株间核苷酸的可变性,排除了可能由于鼠管状线虫和四翼无刺线虫造成的假阳性结果。应用直接镜检实时动态显微视屏摄录技术,从4 649份SPF实验动物和1304份清洁级实验动物样本中分别检出隐匿管状线虫阳性样本96份和35份。应用多重PCR和测序技术,鉴定证明这些阳性样本中确实含有隐匿管状线虫特异性的DNA。测序结果显示,自不同SPF实验动物和清洁级实验动物分离获得的隐匿管状线虫的cox 1、cyt b、nad 1、nad 5、rrn L和28 s r RNA部分基因序列核苷酸相似性达100%。SPF实验动物和清洁级实验动物的隐匿管状线虫感染率分别为2.1%和2.7%。结论:应用直接镜检实时动态显微视屏摄录技术联合多重PCR测序技术能够快速精准检测鉴定出隐匿管状线虫。实验动物常会感染一些人兽共患寄生虫,隐匿管状线虫的人兽共患本质可以视作为公共卫生的一个预警。本研究首次对中国SPF和清洁级的实验动物隐匿管状线虫进行了分子鉴定和感染调查。