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Characterization of Mycobacterium tuberculosis isolates from Hebei, China: genotypes and drug susceptibility phenotypes

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机构: [1]Shijiazhuang Hebei Med Univ, Hosp 5, Dept Lab Med, 42 Tanan Rd, Shijiazhuang 050021, Hebei, Peoples R China [2]Cangzhou Infect Dis Hosp, Dept Lab Med, 68 Guangrong Rd, Cangzhou, Hebei, Peoples R China [3]Fourth Hosp Tangshan, Dept Lab Med, South Xuejing Rd, Tangshan, Hebei, Peoples R China [4]Baoding Infect Dis Hosp, Dept Lab Med, 608 East Dongfeng Rd, Baoding, Hebei, Peoples R China [5]Second Hosp Xingtai, Dept Lab Med, 371 Yurangqiao Rd, Xingtai, Hebei, Peoples R China [6]Third Hosp Qinhuangdao, Dept Lab Med, 222 Jianguo Rd, Qinhuangdao, Hebei, Peoples R China [7]Affiliated Hosp Hebei Univ, Dept Lab Med, 212 East Yuhua Rd, Baoding, Hebei, Peoples R China [8]Chinese Ctr Dis Control & Prevent, Natl Inst Communicable Dis Control & Prevent, State Key Lab Infect Dis Prevent & Control, 155 Changbai Rd, Beijing 102206, Peoples R China
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关键词: Mycobacterium tuberculosis MIRU-VNTR Spoligotyping Drug resistance

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Background: Tuberculosis remains a major public health problem in China. The Hebei province is located in the Beijing-Tianjin-Hebei integration region; however little information about the genetic diversity of Mycobacterium tuberculosis was available in this area. This study describes the first attempt to map the molecular epidemiology of MTB strains isolated from Hebei. Methods: Spoligotyping and 15-locus MIRU-VNTR were performed in combination to yield specific genetic profiles of 1017 MTB strains isolated from ten cities in the Hebei province in China during 2014. Susceptibility testing to first line anti-TB drugs was also conducted for all strains using the L-J proportion method. Results: Based on the SpolDB4.0 database, the predominant spoligotype belonged to the Beijing family (90.5 %), followed by T family (6.3 %). Using 15-locus MIRU-VNTR clustering analysis, 846 different patterns were identified, including 84 clusters (2-17 strains per cluster) and 764 individual types. Drug susceptibility pattern showed that 347 strains (34.1 %) were resistant to at least one of the first line drugs, including 134 (13.2 %) multi-drug resistance strains. Statistical analysis indicated that drug resistance was associated with treatment history. The Beijing family was associated with genetic clustering. However, no significant difference was observed between the Beijing and non-Beijing family in gender, age, treatment history and drug resistance. Conclusions: The Mycobacterium tuberculosis strains in Hebei exhibit high genetic diversity. The Beijing family is the most prevalent lineage in this area. Spoligotyping in combination with 15-locus MIRU-VNTR is a useful tool to study the molecular epidemiology of the MTB strains in Hebei.

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出版当年[2017]版:
大类 | 3 区 医学
小类 | 3 区 传染病学
最新[2025]版:
大类 | 3 区 医学
小类 | 3 区 传染病学
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出版当年[2016]版:
Q2 INFECTIOUS DISEASES
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Q2 INFECTIOUS DISEASES

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第一作者机构: [1]Shijiazhuang Hebei Med Univ, Hosp 5, Dept Lab Med, 42 Tanan Rd, Shijiazhuang 050021, Hebei, Peoples R China
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