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Population structure analysis of the Mycobacterium tuberculosis Beijing family indicates an association between certain sublineages and multidrug resistance.

ABSTRACT: Our population-based study of the Mycobacterium tuberculosis Beijing family examined the frequency of occurrence of each sublineage of this family, classified by using 10 synonymous single-nucleotide polymorphisms. The results revealed the overabundance of two evolutionary sublineages in a population of multidrug-resistant and extensively drug-resistant tuberculosis bacteria.

SUBMITTER: Iwamoto T

PROVIDER: S-EPMC2565899 | biostudies-other | 2008 Oct

REPOSITORIES: biostudies-other

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Population structure analysis of the Mycobacterium tuberculosis Beijing family indicates an association between certain sublineages and multidrug resistance.

Iwamoto Tomotada T Yoshida Shiomi S Suzuki Katsuhiro K Wada Takayuki T

Antimicrobial agents and chemotherapy 20080811 10

Our population-based study of the Mycobacterium tuberculosis Beijing family examined the frequency of occurrence of each sublineage of this family, classified by using 10 synonymous single-nucleotide polymorphisms. The results revealed the overabundance of two evolutionary sublineages in a population of multidrug-resistant and extensively drug-resistant tuberculosis bacteria. ...[more]

PMID: 18694954

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Project description:BACKGROUND:The most prevalent strains of Mycobacterium tuberculosis (M.tb) in Beijing belong to the Beijing genotype family. The influence of Beijing genotype prevalence on the development of drug resistance, and the association of infection with Beijing genotype M.tb with population characteristics, in Beijing, however, are still unclear. METHODS:In this retrospective study, 1189 isolates were subjected to drug susceptibility testing (DST) and molecular epidemiological analysis, and differences in the percentage of drug resistance between Beijing and non-Beijing genotype strains were compared. The association between the occurrence of drug resistance and the prevalence of Beijing genotype M.tb was analyzed using statistical methods. RESULTS:The Beijing genotype family was the dominant genotype (83.3%) among the 1189?M.tb isolates. Beijing genotype M.tb strains were more likely to spread among males [p?=?0.018, OR (95% CI):1.127(1.004-1.264)] and people in the 45-64 age group [p?=?0.016, OR (95% CI): 1.438 (1.027-2.015)]. On the contrary, non-Beijing genotype M.tb strains were more probably disseminated among the over 65 [p?=?0.005, OR (95% CI):0.653 (0.474-0.9)] and non-resident population [p?=?0.035, OR (95% CI):1.185(0.985-1.427)]. DST results showed that 849 (71.4%) strains were fully sensitive to first-line drugs, while 340 (28.6%) strains were resistant to at least one drug, and 9% (107/1189) were MDR-TB. The frequency of INH-resistance among Beijing genotype strains was significantly lower than that among non-Beijing genotype strains (p?=?0.032). In addition, the Beijing genotype family readily formed clusters. CONCLUSIONS:Our findings indicate that male and middle-aged people were more probably be infected by Beijing genotype M.tb, older people and non-residents were more probably be infected by non-Beijing genotype M.tb. The high percentage of resistance to INH occurring in non-Beijing genotype strains suggested that non-Beijing genotype strains should be given much more interest in Beijing.

Dataset Information

Population structure analysis of the Mycobacterium tuberculosis Beijing family indicates an association between certain sublineages and multidrug resistance.

Publications

Population structure analysis of the Mycobacterium tuberculosis Beijing family indicates an association between certain sublineages and multidrug resistance.

Similar Datasets

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