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ORIGINAL ARTICLE
Year : 2012  |  Volume : 15  |  Issue : 4  |  Page : 430-435

Comparative analysis of case screening with varying cough duration and sputum samples for diagnosis of tuberculosis in patients attending the OPD at a tertiary care hospital at Srinagar, India


1 Department of Community Medicine, SKIMS Srinagar, India
2 Department of Internal Medicine, DH Pulwama, A Multispeciality Hospital, Jammu and Kashmir, India

Correspondence Address:
S A Hussain
B Grade consultant, (Tropical medical medical unit), DH Pulwama, Jammu and Kashmir
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1119-3077.104519

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Research Question: Can we minimize cough duration and number of sputum samples in chest symptomatic patients for screening of TB? Objective: To evaluate cough of 3 weeks versus 2 weeks duration using two sputum samples versus three samples in chest symptomatic patients attending the OPD. Study Design: Hospital-based cross-sectional study. Materials and Methods: Outpatients (2810) with H/O cough of 3 weeks and 2 weeks duration were screened by subjecting them to sputum microscopy for tuberculosis using two sputum samples as well as three samples following standard procedure for sputum collection, staining and acid-fast bacillus (AFB) identification. Those on drugs were not included. Results: Using ≥2 weeks cough, sputum positivity rate was 12%, nearly as high as the sputum positivity among patients with ≥3 weeks cough, i.e. 14%. First sputum smear alone on an average could detect 91.8% cases, while the first two sputum smears could detect on an average 96% cases. The study showed that maximum number of cases was diagnosed by only two sputum smears and added diagnostic value of third specimen was small, i.e. 4%.High sputum positivity rate using ≥2 weeks cough with two sputum samples was seen. Conclusion: The sensitivity analysis of the study showed that using ≥2 weeks cough with two sputum samples gives almost similar values as ≥3 weeks cough with three sputum samples, but this needs further confirmatory results of culture sensitivity. Hence, using ≥2 weeks cough with two sputum samples as the diagnostic criteria for screening of cough patients for TB should be recommended as one way of improving efficient use of scarce resources.


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