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Int J Antimicrob Agents. 2003 Mar;21(3):244-50.

Comparison of the susceptibility testing of clinical isolates of Mycobacterium tuberculosis by the XTT colorimetric method and the NCCLS standards method.

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  • 1Dipartimento di Scienze Chirurgiche e Trapianti d'Organo, Sezione di Microbiologia e Virologia, Università di Cagliari, Viale Frà Ignazio 38, 09123 Cagliari, Italy. adelogu@unica.it

Abstract

The susceptibility or resistance of clinical isolates of Mycobacterium tuberculosis were determined by a method incorporating the 2,3-bis(2-methoxy-4-nitro-5-sulphophenyl)-2H-tetrazolium-5-carboxanilide (XTT) and compared with results obtained by the National Committee for Clinical Laboratory Standards approved standard method (M24-T2). One hundred percent of all isolates demonstrated agreement between the susceptibility and resistance to isoniazid, rifampicin, and ethambutol obtained by the two methods, suggesting that the XTT-based method could provide a useful means for the rapid determination of antimycobacterial susceptibility of clinical isolates of M. tuberculosis.

PMID:
12636986
[PubMed - indexed for MEDLINE]
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