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Isolation and identification of nontuberculous mycobacteria from water and soil in central India

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Author(s): Narang R | Narang P | Mendiratta D

Journal: Indian Journal of Medical Microbiology
ISSN 0255-0857

Volume: 27;
Issue: 3;
Start page: 247;
Date: 2009;
Original page

Keywords: Central India | environmental mycobacteria | nontuberculous mycobacteria

ABSTRACT
Nontuberculous mycobacteria (NTM), important organisms in the Genus Mycobacterium and commonly present in the environment, are known to cause disseminated disease in AIDS patients. In this study, NTM were isolated from environment (soil and water) of the AIDS patients with disseminated NTM disease to know the prevalence of environmental NTM species and their correlation with clinical isolates from patients of the same area. Paraffin baiting technique was used to isolate NTM from environmental samples. Once isolated, subcultures were made on Lowenstein Jensen and Middlebrook 7H10 media and the species were identified using phenotypic and genotypic techniques. A total of 26 NTM isolates belonging to seven different species could be identified. Mycobacterium avium was the only species isolated from both clinical and environmental samples of the same patient; but the isolates did not match using PCR for IS 1311 and IS 1245 spacer sequences.

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