Resistance pattern both in newly and previously treated-TB patients and risk factors associated in spread of tuberculosis are investigated in the current study. A total 244 Mycobacterium tuberculosis isolates were used for drug-susceptibility test against four drugs. Environmental risk factors were assessed by using self-designed history proforma. Among 244 TB-isolates, 64% were categorized as MDR-TB in drug-susceptibility test. Male proportion was 51% while 32% belonged to 15-34 years age group and 49% were from city Lahore whereas majority of people (31%) was working on daily wages. Divergent drug-resistance pattern was obtained; RIF (68%), SM (52%), EMB (51%). INH showed only (27%) resistance against first-line anti-TB drug. Drug-resistance prevalence for two drug combination was highest (50%) for (INH+SM) and (INH+EMB) followed by (RIF+SM) (49%) whereas for three drugs combination (INH+RIF+EMB) and (INH+RIF+SM) the prevalence was almost same 50% and 49% respectively while 66% patients were categorized as previously treated and 34% as new TB cases. In drug susceptibility test, 71% were identified as MDR-TB among New TB cases, while 63% were identified as MDR-TB from previously treated cases. Surprisingly DST results displayed that percentage prevalence of MDR-TB both in newly and previously treated cases was almost same.
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