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Currently, tuberculosis control is dependent on several factors, such as rapid diagnosis, appropriate therapy and measures to prevent future transmission. Thus, the characterization of strains of Mycobacterium tuberculosis by molecular typing using RFLP-IS6110, provides a major contribution, and has been widely used in genotyping studies in order to trace transmission pathways. However, due to the complexities of the technique and data interpretation, other techniques have been proposed. Among them, the study of the variable number of repeat units (MIRU-VNTR) has been indicated as a new standard method. This study aimed to apply and compare the RFLP-IS6110 and 15 loci MIRU-VNTR techniques for the analysis of isolates from tuberculosis patients treated in Goiânia, Brazil, in order to establish possible molecular epidemiological links between cases of the disease, and also to compare the results found by both techniques against the wider situation in Brazil. The results showed that 15 loci MIRU-VNTR discriminated between the isolates better than the RFLP-IS6110. No epidemiological link was observed among the patients studied. The results validate the use of the 15 loci MIRU-VNTR technique for molecular typing of M. tuberculosis, as it showed greater discriminatory power with good efficiency to genetically characterize the isolates in Goiânia, Goias. This can be used in epidemiological studies alone or in conjunction with other molecular techniques.

ANÁLISE MOLECULAR DE Mycobacterium tuberculosis ISOLADOS DE PACIENTES ATENDIDOS EM GOIÂNIA, GOIÁS, POR MEIO DO RFLP-IS6110 E DO 15 loci MIRU-VNTR