Discrimination of Mycobacterium tuberculosis strains by PCR

Discrimination of Mycobacterium tuberculosis strains by PCR.

Rapid discrimination of Mycobacterium tuberculosis complex strains by ligation-mediated PCR fingerprint analysis.

A ligation-mediated PCR (LMPCR) method for the amplification of sequences flanking the IS6110 of the Mycobacterium tuberculosis complex has been developed. The method uses one primer specific for IS6110 and a second specific for a linker ligated to SalI-restricted genomic DNA. LMPCR is a rapid screening method, valuable for the fingerprinting of M. tuberculosis complex strains.

PCR amplification of variable sequence upstream of katG gene to subdivide strains of Mycobacterium tuberculosis complex.

PCR amplification of a species-specific 2-kb KpnI fragment of variable size located 10 kb upstream of the katG gene was used to subdivide 130 clinical isolates of Mycobacterium tuberculosis. Seven subtypes were identified, and their frequencies were distributed normally with respect to the size of the amplified product.

Infectiousness of drug-resistant Mycobacterium tuberculosis strains

October 2007, Vol. 97, No. 10 SAMJ Drug-resistant tuberculosis (TB), and especially multidrugresistant (MDR) TB (i.e. resistance to isoniazid and rifampicin with or without resistance to other drugs) or extensively drug-resistant (XDR) TB (i.e. MDR resistance plus resistance to the fluoroquinolones and one of the second-line injectables – kanamycin, amikacin or capreomycin),1 has very important...

High Resolution Discrimination of Clinical Mycobacterium tuberculosis Complex Strains Based on Single Nucleotide Polymorphisms

Recently, the diversity of the Mycobacterium tuberculosis complex (MTBC) population structure has been described in detail. Based on geographical separation and specific host pathogen co-evolution shaping MTBC virulence traits, at least 20 major lineages/genotypes have evolved finally leading to a clear influence of strain genetic background on transmissibility, clinical presentation/outcome, a...