Potential yield of pulmonary tuberculosis cases by direct microscopy of sputum in a district of South India
Baily, G.V.J.; Savic, D.; Gothi, G.D.; Naidu, V.B. and Nair, S.S. (1968) Potential yield of pulmonary tuberculosis cases by direct microscopy of sputum in a district of South India. Indian Journal of Tuberculosis, 15 (4). pp. 130-146.
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(1) Since coughing is the major symptom of pulmonary tuberculosis, case-finding can be carried out among the new out-patients spontaneously complaining of a cough with a duration exceeding 2 weeks. Patients complaining of a cough in the course of suggestive questioning and those having had a cough for less than 2 weeks yield only a very small pro portion of cases of pulmonary tuberculosis, (2) The work-load due to tuberculosis case-finding in a rural health institution is small, i.e., about 4% of new out-patients aged 10 years and over spontaneously complaining of a cough lasting more than 2 weeks are symptomatic and need further examination. (3) The integrated district programme can in 1 year diagnose about 65% of the total direct smear-positive cases or 45% of the entire number of cases estimated to be pre valent in the district at a point of time that could be confirmed by any bacteriolygical method. This rate of diagnosis is most pro bably considerably higher than the rate of in cidence of the disease. (4) The contribution of radiography in diagnosing rural cases is small, whether it is used as a referral for initial diagnosis or for diagnosis of additional suspect cases
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