title: A new Multi-PCR-SSCP assay for simultaneous detection of isoniazid and rifampin resistance in Mycobacterium tuberculosis.
abstract: Prompt detection of drug resistance in Mycobacterium tuberculosis is essential for effective control of tuberculosis (TB). We developed a Multi-PCR-SSCP method that detects more than 80% commonly observed isoniazid (INH) and rifampin (RIF) resistance M. tuberculosis in a single assay. The usefulness of the newly developed method was evaluated with 116 clinical isolates of M. tuberculosis. Distinct SSCP patterns were observed for different mutations and the correlation between Multi-PCR-SSCP results and DNA sequencing data was strong. Using the culture-based phenotypic drug susceptibility testing as a reference, the sensitivity of the newly developed Multi-PCR-SSCP assay was determined to be 80% and 81.8% for INH and RIF, respectively. The specificity of the assay was 100% and 92%, for INH and RIF, respectively. Multi-PCR-SSCP provides a rapid and potentially more cost-effective method of detecting multidrug-resistant TB.
authors.affiliation: Department of Clinical Laboratory, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Cheng
authors.forename: Jianfang
authors.initials: J
authors.lastname: Zhang
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.forename: Xiuli
authors.initials: X
authors.lastname: Xu
authors.forename: Jianyun
authors.initials: J
authors.lastname: Liu
authors.forename: Wenbin
authors.initials: W
authors.lastname: Yu
authors.forename: Mingquan
authors.initials: M
authors.lastname: Su
authors.forename: Xiaoke
authors.initials: X
authors.lastname: Hao
mesh_terms: D000995:Antitubercular Agents / Q000494:pharmacology*; D004269:DNA, Bacterial / Q000235:genetics; D024881:Drug Resistance, Bacterial / Q000235:genetics*; D006801:Humans; D007538:Isoniazid / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests / Q000379:methods*; D009154:Mutation; D009169:Mycobacterium tuberculosis / Q000187:drug effects*; D016133:Polymerase Chain Reaction / Q000379:methods*; D018807:Polymorphism, Single-Stranded Conformational; D012293:Rifampin / Q000494:pharmacology*; D012680:Sensitivity and Specificity; D017422:Sequence Analysis, DNA
chemical_list: D000995:Antitubercular Agents; D004269:DNA, Bacterial; D007538:Isoniazid; D012293:Rifampin