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Journal articles
Suitability of IS6110-RFLP and MIRU-VNTR for differentiating spoligotyped drug-resistant mycobacterium tuberculosis clinical isolates from Sichuan in China.
Abstract : Genotypes of Mycobacterium tuberculosis complex (MTBC) vary with the geographic origin of the patients and can affect tuberculosis (TB) transmission. This study was aimed to further differentiate spoligotype-defined clusters of drug-resistant MTBC clinical isolates split in Beijing (n = 190) versus non-Beijing isolates (n = 84) from Sichuan region, the second high-burden province in China, by IS6110-restriction fragment length polymorphism (RFLP) and 24-locus MIRU-VNTRs. Among 274 spoligotyped isolates, the clustering ratio of Beijing family was 5.3% by 24-locus MIRU-VNTRs versus 2.1% by IS6110-RFLP, while none of the non-Beijing isolates were clustered by 24-locus MIRU-VNTRs versus 9.5% by IS6110-RFLP. Hence, neither the 24-locus MIRU-VNTR was sufficient enough to fully discriminate the Beijing family, nor the IS6110-RFLP for the non-Beijing isolates. A region adjusted scheme combining 12 highly discriminatory VNTR loci with IS6110-RFLP was a better alternative for typing Beijing strains in Sichuan than 24-locus MIRU-VNTRs alone. IS6110-RFLP was for the first time introduced to systematically genotype MTBC in Sichuan and we conclude that the region-adjusted scheme of 12 highly discriminative VNTRs might be a suitable alternative to 24-locus MIRU-VNTR scheme for non-Beijing strains, while the clusters of the Beijing isolates should be further subtyped using IS6110-RFLP for optimal discrimination.
Cited literature [52 references]
https://hal-riip.archives-ouvertes.fr/pasteur-01011074
Contributor : Nalin Rastogi <>
Submitted on : Sunday, June 22, 2014 - 10:32:47 PM
Last modification on : Monday, August 17, 2020 - 2:20:04 PM
Long-term archiving on: : Tuesday, April 11, 2017 - 8:08:38 AM
Contributor : Nalin Rastogi <>
Submitted on : Sunday, June 22, 2014 - 10:32:47 PM
Last modification on : Monday, August 17, 2020 - 2:20:04 PM
Long-term archiving on: : Tuesday, April 11, 2017 - 8:08:38 AM
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BMRI763204_China.pdf
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