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目的 研究宜昌地区结核分枝杆菌北京基因型菌株的多态性和流行特征,揭示该地区结核病的分子流行病学特征,为结核病防治提供科学依据。方法 选择2018年1月-2019年12月具有完整病例信息的结核分枝杆菌298株,进行人型结核分枝杆菌的鉴定,用扩增RD105缺失片段的多重PCR (DTM-PCR)鉴定北京基因型菌株;应用优化的9位点数目可变串联重复序列技术(VNTR)分析北京基因型菌株的多态性。结果 298株结核分枝杆菌中,260株为人型结核分枝杆菌,DTM-PCR鉴定发现北京基因型菌株140株(53.85%),非北京基因型菌株120株(46.15%)。北京基因型菌株耐药率(32.14%)高于非北京基因型菌株耐药率(10.83%),差异有统计学意义(P<0.05)。VNTR-9位点对北京基因型菌株的分辨率为0.998 5,成簇率为12.15%。结论 北京基因型菌株在宜昌地区呈较高流行趋势,且北京基因型菌株耐药率更高。VNTR-9位点基因分型方法用于该地区结核分枝杆菌北京基因型菌株的鉴别,能准确反映宜昌地区结核分枝杆菌的分子流行病学特征。 相似文献
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Lillebaek T Andersen AB Dirksen A Glynn JR Kremer K 《Emerging infectious diseases》2003,9(12):1553-1557
Molecular epidemiologic studies of strains of Mycobacterium tuberculosis are currently conducted worldwide. The genetically distinct Beijing family of strains has been associated with large outbreaks of tuberculosis, increased virulence, and multidrug resistance. However, in this first population-based search for Beijing strains in the Danish DNA fingerprint database, analysis of 97% of all culture-positive tuberculosis patients in 1992 to 2001 showed that 2.5% of 3,844 patients, 1.0% of Danish-born patients, and 3.6% of immigrants (from 85 countries) had Beijing strains. No Beijing strains were found among 201 strains from Danish-born patients sampled in the 1960s, and no evidence of an increase in Beijing strains was found over time. The true prevalence of Beijing strains worldwide is unknown because only a fraction of global strains have been analyzed. 相似文献
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Glynn JR Crampin AC Traore H Yates MD Mwaungulu FD Ngwira BM Chaguluka SD Mwafulirwa DT Floyd S Murphy C Drobniewski FA Fine PE 《Emerging infectious diseases》2005,11(1):150-153
In a 7-year population-based study in Malawi, we showed that Beijing genotype tuberculosis (TB) increased as a proportion of TB cases. All the Beijing genotype strains were fully drug sensitive. Contact histories, TB type, and case-fatality rates were similar for Beijing and non-Beijing genotype TB. 相似文献
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目的鉴定MTB北京基因型,了解北京基因型菌株在绵阳地区的分布特征,为本地结核病的防治和分子流行病学研究提供科学依据。方法随机选取绵阳涪城和江油两个区县的结核分支杆菌临床分离菌株,收集患者流行病学资料。菌株常规培养,收集菌体,提取基因组DNA,采用RD105缺失基因检测法鉴定北京基因型菌株。药物敏感性试验采用比例法。率的比较采用χ2检验。结果共对79株结核分支杆菌了进行北京基因型鉴定,北京基因型菌株33株,占41.77%;非北京基因型菌株46株,占58.23%。北京基因型菌株耐药率(36.36%)明显高于非北京基因型菌株耐药率(10.87%),差异有统计学意义(χ2=7.395,P=0.007)。患者性别、年龄组、所在地区和治疗史与感染北京基因型菌株无关。结论北京基因型菌株在绵阳地区呈一般流行趋势。北京基因型菌株感染与耐药相关,与患者性别、年龄、所在地区和治疗史无关。 相似文献
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de Steenwinkel JE ten Kate MT de Knegt GJ Kremer K Aarnoutse RE Boeree MJ Verbrugh HA van Soolingen D Bakker-Woudenberg IA 《Emerging infectious diseases》2012,18(4):660-663
To determine differences in the ability of Mycobacterium tuberculosis strains to withstand antituberculosis drug treatment, we compared the activity of antituberculosis drugs against susceptible Beijing and East-African/Indian genotype M. tuberculosis strains. Beijing genotype strains showed high rates of mutation within a wide range of drug concentrations, possibly explaining this genotype's association with multidrug-resistant tuberculosis. 相似文献
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目的了解西安市肺结核患者的耐药疫情及初始耐药与获得性耐药的耐药情况,为耐药结核病的治疗以及控制模式提供依据。方法将2015年西安市14个区(县)结核病门诊和西安市胸科医院所有初治及复治痰结核分枝杆菌培养阳性的病例作为研究对象,进行4种一线抗结核药物的敏感性试验。结果西安市结核分枝杆菌总耐药率为31.9%,耐多药(MDR)率为7.0%。初治组耐药率为27.3%,MDR率为3.5%。复治组耐药率为59.5%,MDR率为28.6%,复治组耐药率与MDR率均明显高于初治组,差异均有统计学意义(均P0.001)。结论西安市肺结核患者总耐药率低于全国平均水平,但MDR率略高于全国水平,说明西安市结核病防控工作虽然取得一定成效,但形势依然严峻,特别是要加强初治患者的管理以减少耐药结核病的发生。 相似文献
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202例肺结核患者痰培养阳性菌株耐药性分析 总被引:2,自引:0,他引:2
目的了解某市胸科医院住院患者痰标本分离结核分枝杆菌的耐药情况。方法回顾性调查该院2003年1月1日-2006年12月31日所有新发和复治的肺结核病患者痰标本分离结核分枝杆菌对异烟肼、链霉素、乙胺丁醇和利福平的敏感性。结果4年间202例住院肺结核患者痰标本分离的结核分枝杆菌总耐药率为39.11%(79/202),总耐多药率为10.89%(22/202)。初始耐药率为35.11%,获得性耐药率为46.48%。获得性耐多药率16.90%,明显高于初始耐多药率7.63%(χ2=4.08,P=0.049)。2004年度获得性耐多药率36.36%,明显高于初始耐多药率5.66%(χ2=5.95,P=0.02);2006年获得性耐多药率与初始耐多药率相同,均为13.51%。复治患者对异烟肼、链霉素、利福平均显示较高的耐药性,耐药率分别为47.89%、46.48%、36.62%,复治患者耐多药率为35.21%;初治患者单耐药率和多耐药率均为16.03%。结论耐药和耐多药肺结核病疫情严重,特别是初始耐药和耐多药结核病,故有效控制耐药结核病是我们当前所面临的紧迫任务。 相似文献
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Mycobacterium tuberculosis Beijing genotype, the Netherlands 总被引:2,自引:0,他引:2
To determine whether the Beijing genotype of Mycobacterium tuberculosis is emerging in the Netherlands, we collected data on 6,829 patients during 1993 to 2000. Six percent had the Beijing genotype. This genotype was associated with diagnosis in recent years, young age, nationality, and multidrug resistance. 相似文献
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Gori A Bandera A Marchetti G Degli Esposti A Catozzi L Nardi GP Gazzola L Ferrario G van Embden JD van Soolingen D Moroni M Franzetti F 《Emerging infectious diseases》2005,11(8):1242-1248
We evaluated the clinical usefulness of spoligotyping, a polymerase chain reaction-based method for simultaneous detection and typing of Mycobacterium tuberculosis strains, with acid-fast bacilli-positive slides from clinical specimens or mycobacterial cultures. Overall sensitivity and specificity were 97% and 95% for the detection of M. tuberculosis and 98% and 96% when used with clinical specimens. Laboratory turnaround time of spoligotyping was less than that for culture identification by a median of 20 days. In comparison with IS6110-based restriction fragment length polymorphism typing, spoligotyping overestimated the number of isolates with identical DNA fingerprints by approximately 50%, but showed a 100% negative predictive value. Spoligotyping resulted in the modification of ongoing antimycobacterial treatment in 40 cases and appropriate therapy in the absence of cultures in 11 cases. The rapidity of this method in detection and typing could make it useful in the management of tuberculosis in a clinical setting. 相似文献
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目的了解湖南省涂阳肺结核耐药的基本状况、耐药危险因素,为耐药结核病防治提供可靠的参考依据。方法收集2012—2014年湖南省20个结核病专业防治机构确证的1 935株结核分枝杆菌复合群菌株进行药物敏感试验和结果分析,同时对耐药产生的因素进行统计分析。结果1 935株结核分枝杆菌复合群菌株中,1 207株(占62.38%)对6种抗结核药物均敏感,728株耐药株,总耐药率为37.62%;耐多药(MDR)菌467株,MDR率为24.13%,其中广泛耐药(XDR)菌64株,XDR率为3.31%,耐药率由高到低依次为:异烟肼(INH)29.32%、利福平(RFP) 25.84%、链霉素(SM)20.73%、乙胺丁醇(EMB)9.00%、氧氟沙星(OFX)7.83%和卡那霉素(KM)2.21%。多因素logistic 回归分析结果显示:有治疗史、20~39岁和40~60岁组是影响肺结核耐药和MDR的危险因素。复治失败患者INH、RFP、SM、EMB、OFX、KM耐药以及MDR的OR(95%CI)分别为:13.5(9.9~18.4)、21.2(15.2~29.5)、5.3(3.9~7.2)、11.9(7.6~18.7)、7.6(4.6~12.6)、7.9(3.6~17.5)、25.0(17.7~35.1);复发患者INH、RFP、SM、EMB、OFX耐药以及MDR的OR(95%CI)分别为:7.4(5.5~10.0)、10.3(7.4~14.2)、3.5(2.5~4.8)、7.3(4.5~11.9)、4.1(2.5~6.8)、12.2(8.7~17.1);初治失败患者INH、RFP、SM、EMB耐药以及MDR的OR(95%CI)分别为: 7.6(4.7~12.3)、9.8(5.9~16.0)、4.1(2.5~6.8)、12.1(6.5~22.7)、11.4(6.9~18.9)。20~39岁组患者INH、RFP、SM耐药及MDR的OR(95%CI)分别为:2.5(1.8~3.4)、3.6(2.5~5.2)、2.9(2.0~4.1)、4.1(2.8~6.1);40~60岁组INH、RFP、SM耐药及MDR的OR(95%CI)分别为:2.2(1.6~3.0)、3.1(2.2~4.4)、2.3(1.6~3.2)、3.3(2.3~4.7)。结论湖南省涂阳肺结核患者耐药状况比较严重,进行过抗结核治疗会增加患者产生耐药和MDR的风险,20~60岁的患者产生耐药和MDR的风险较高。 相似文献
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Mycobacterium tuberculosis Beijing genotype and risk for treatment failure and relapse, Vietnam 总被引:2,自引:0,他引:2
Lan NT Lien HT Tung le B Borgdorff MW Kremer K van Soolingen D 《Emerging infectious diseases》2003,9(12):1633-1635
Among 2,901 new smear-positive tuberculosis cases in Ho Chi Minh City, Vietnam, 40 cases of treatment failure and 39 relapsing cases were diagnosed. All initial and follow-up Mycobacterium tuberculosis isolates of these case-patients had (nearly) identical restriction fragment length polymorphism patterns, and the Beijing genotype was a significant risk factor for treatment failure and relapse (odds ratio 2.8, 95% confidence interval 1.5 to 5.2). 相似文献
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天津地区临床分离结核分枝杆菌分型的初步研究 总被引:1,自引:0,他引:1
目的探讨天津地区结核分枝杆菌临床分离株分子流行病学特征。方法连续收集天津市海河医院2005年8月16日11月25日就诊患者痰培养阳性的结核分枝杆菌100株,采用间隔区寡核苷酸分型(spoligotyping)和多位点可变串联重复序列(VNTR)两种方法进行基因分型,并运用软件对二者的结果进行分析。依据北京分化支的定义,运用多重和实时定量PCR方法将其区分为W菌/典型北京家族菌株和非典型北京菌株,Χ^2检验分析两种亚群与患者年龄和耐药性之间的联系。结果排除污染菌株,共对96株结核分枝杆菌临床分离株进行两种方法的基因分型,spoligotyping结果91.7%为北京基因型(含3株类北京基因型)结核分枝杆菌(88/96)。VNTR分型可将北京基因型分为60种基因型。在北京分化支结核分枝杆菌中,W菌/典型北京家族菌株占93.2%(82/88)。两种北京分化支亚群与患者年龄及耐药性之间差异无统计学意义(P〉0.05)。结论天津地区结核病患者临床分离的结核分枝杆菌中,北京基因型呈现较为明显的优势。VNTR的分辨率明显高于spoligotyping。北京分化支的两种亚群在天津地区临床结核病患者中均有流行,但以W菌/典型北京家族菌株为主。 相似文献
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我国是结核病高耐药国家,而高耐药率给结核病患者的治疗带来很大困难,并对其流行产生严重影响.本研究同时采用IS6110-RFLP、spoligotyping对结核分枝杆菌进行基因分型,探讨不同地区不同基因型的耐药特点及北京基因型与4种药物[利福平(RFP)、异烟肼(INH)、链霉素(SM)、乙胺丁醇(EM8)]耐药的关系. 相似文献