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Updated: May 17, 2026

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
Published on: April 25, 2014
Identification of drug-resistantMycobacterium tuberculosis by single strand conformation polymorphism and cleavase
1Vancouver General Hospital and Health Sciences, Vancouver, B.C. Canada.
Abstract:
Twenty isolates ofMycobacterium tuberculosis resistant to rifampicin(RIF), isoniazid(INH) and streptomycin(STR) were analysed by Polymerase Chain Reaction (PCR) amplification of rpoB, katG and rrs genes to evaluate comparative diagnostic significance of genetic assays. Mutations were identified by single strand conformation polymorphism (SSCP) and cleavase fragment length polymorphism (CFLP) and were confirmed by DNA sequencing. SSCP of 4 RIF resistant and 14 INH resistant isolates showed an extra peak at the level of 75-bp and 85-bp respectively, while 2 STR resistant isolates showed 2 peaks with 9 bases difference. CFLP showed a different pattern among RIF, INH and STR sensitive and resistant isolates Thus SSCP and CFLP can be used as alternative diagnostic methods for identification of mutations in RIF, INH and STR resistant strains of M.tuberculosis.
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