Wh. Haas et al., MOLECULAR ANALYSIS OF KATG GENE-MUTATIONS IN STRAINS OF MYCOBACTERIUM-TUBERCULOSIS COMPLEX FROM AFRICA, Antimicrobial agents and chemotherapy, 41(7), 1997, pp. 1601-1603
A sample of 124 isoniazid (INH)-resistant and 88 susceptible strains o
f Mycobacterium tuberculosis complex from south, central, and west Afr
ica was analyzed by direct sequence analysis and PCR-restriction fragm
ent length polymorphism analysis of their catalase-peroxidase (katG) g
enes. Point mutations at codon 315 were found in the genomes of 64% of
INH-resistant strains, but no complete deletions were identified. Mut
ations at codon 463 were independent of INH resistance and were linked
to the geographic origins of the strains.