Abstract | BACKGROUND: The prevalence of drug-resistant tuberculosis (TB) in Xinjiang is higher than in other regions of China, and Beijing/W lineage Mycobacterium tuberculosis (MTB) is the dominant strain of MTB in Xinjiang. However, information on multidrug-resistant (MDR) and extensively drug-resistant ( XDR) TB, particularly the correlation between MDR and the Beijing/W lineage and the correlation between drug resistance and the Beijing/W sublineage strains, is limited. MATERIAL/METHODS: We conducted a prospective study to describe the prevalence of MDR/ XDR TB, Beijing/W lineage and sublineage strains in Xinjiang in China from 2009 to 2013. All MTB underwent drug susceptibility testing to the first- and second-line anti-tuberculosis drugs. The Beijing/W lineages and sublineages were detected by large-sequence polymorphisms with polymerase chain reaction. RESULTS: A total of 410 clinical isolates were identified. The overall percentage of MDR and XDR cases in Xinjiang was 13.2% (54/410) and 13.0% (7/54), respectively. Overall, 9.8% (14/143) of the Beijing lineage MTB were MDR patients, and 15.6% (40/257) of the Non-Beijing lineage MTB were MDR patients. In the 143 Beijing MTB lineages, 11.2% isolates were in sublineage 105, 15.4% isolates were in sublineage 207, 69.2% isolates were in sublineage 181, and 4.2% isolates were in sublineage 150. None of the isolates were detected in sublineage 142. Significant differences between the Beijing/W and non-Beijing/W strains were observed regarding INH and EMB resistance, respectively. CONCLUSIONS: The prevalence of the MDR TB in Xinjiang remains high and imposes challenges for TB control. Four Beijing/W sublineage isolates were observed in Xinjiang. There was no correlation between MDR and the Beijing/W lineage and no correlation between drug resistance and the Beijing/W sublineage strains. Surveillance of the clinical isolates of MTB is recommended to strengthen the identification of MDR/ XDR TB and sublineages of the Beijing/W strains.
|
Authors | Xian-hua Wang, Ai-guo Ma, Xiu-xia Han, Xiao-ming Gu, Li-ping Fu, Peng-gang Li, Fen-yu Li, Qiu-zhen Wang, Hui Liang, Abudu Katar, Li-jie Wang |
Journal | Medical science monitor : international medical journal of experimental and clinical research
(Med Sci Monit)
Vol. 21
Pg. 1313-8
(May 07 2015)
ISSN: 1643-3750 [Electronic] United States |
PMID | 25950148
(Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Antitubercular Agents
- DNA, Bacterial
|
Topics |
- Adolescent
- Adult
- Age Factors
- Aged
- Antitubercular Agents
(classification, pharmacology, therapeutic use)
- Child
- Child, Preschool
- China
(epidemiology)
- DNA, Bacterial
(genetics)
- Drug Resistance, Multiple, Bacterial
(genetics)
- Extensively Drug-Resistant Tuberculosis
(epidemiology, microbiology)
- Female
- Genes, Bacterial
- Humans
- Male
- Middle Aged
- Mycobacterium tuberculosis
(classification, drug effects, genetics)
- Prevalence
- Prospective Studies
- Species Specificity
- Tuberculosis, Multidrug-Resistant
(epidemiology, microbiology)
- Young Adult
|