Annual risk of tuberculous infection in Khammam a tribal district of Andhra Pradesh

Chadha, V.K.; Banerjee, A.; Ibrahim, M.; Jagnatha, P.S. and Kumar, P. (2003) Annual risk of tuberculous infection in Khammam a tribal district of Andhra Pradesh. Commun. Dis., 35 (3). pp. 198-205.

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Abstract

A tuberculin survey to estimate annual risk of tuberculosis was conducted in Khammam tribal district during 2001-2002. A total of 8637 children were test-read - 2991 without BCG scar and 5442 with BCG scar. The tests were performed using ITU PPD RT23 and the maximum size of induration was recorded at about 72 hours after the test. Based on the frequency distribution of reaction size, cut-off point for infection with tubercle bacilli was considered at 12 mm. Using this criterion, the prevalence of infection was estimated at 11.8% among children without BCG scar and 10.6% among children with BCG scar. This difference was found to be statistically insignificant. ARTI rates computed from the prevalence estimates among children without and with BCG scar were 1.6% and 1.5% respectively. It was computed as 1.5% from the prevalence in the combined group i.e. irrespective of BCG scar status.

EPrint Type:Article
Uncontrolled Keywords:Tuberculosis, Infection, Prevalence, Annual risk, Tuberculin, BCG Scar, Khammam, Andhra Pradesh
Subjects:Investigative Techniques > Epidemiologic Methods > Data Collection > Vital Statistics > Morbidity > Prevalence
Health Care Quality, Access, and Evaluation > Quality of Health Care > Health Care Evaluation Mechanisms > Statistics > Probability > Risk
Bacterial Infections and Mycoses > Bacterial Infections > Gram-Positive Bacterial Infections > Actinomycetales Infections > Mycobacterium Infections > Tuberculosis
Diagnosis > Diagnostic Techniques and Procedures > Skin Tests > Tuberculin Test
-Institutional Repositories > National Tuberculosis Institute
Bacterial Infections and Mycoses > Bacterial Infections > Gram-Positive Bacterial Infections > Actinomycetales Infections > Mycobacterium Infections
Immunologic and Biological Factors > Biological Products > Vaccines > Bacterial Vaccines > Tuberculosis Vaccines > BCG Vaccine
ID Code:389
Deposited By:Librarian Sudha S Murthy
Deposited On:28 July 2005

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