• J Pak Med Assoc · Sep 2006

    Assessment of resistance in multi drug resistant tuberculosis patients.

    • Seema Irfan, Qaiser Hassan, and Rumina Hasan.
    • Department of Pathology and Microbiology, The Aga Khan University, Karachi.
    • J Pak Med Assoc. 2006 Sep 1; 56 (9): 397-400.

    ObjectiveTo study MDR-TB isolates and to identify primary and secondary resistance at microbiology laboratory Aga Khan University, Karachi, Pakistan.MethodsAll samples positive for Mycobacterium tuberculosis (MTB) received during January - September 2004 were reviewed for drug resistance pattern as well as for history of previous antituberculous drugs exposure.ResultsOut of 216 Mycobacterium tuberculosis cultures, 138 (64%) showed resistance to one or more agents. Multi drug resistance (MDR) was observed in 102 (47%) isolates. Of 138 drug resistant isolates; primary resistance to any one or more agent was noted in 31(39%) and secondary (acquired) resistance in 107 (79%) isolates. On analysis of the 102 MDR-TB strains 8 (10%) showed primary resistance while 94 (69%) showed secondary resistance.ConclusionIn this group MDR-TB was mainly associated with previous anti-tuberculous treatment. However, primary MDR was also observed and reflects dissemination of MDR cases within the community.

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