Manual for tuberculin testers and readers
Krishnamurthy, M.S. (1992) Manual for tuberculin testers and readers. Manual. National Tuberculosis Institute, Bangalore, India.
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Tuberculin is the protein extract of Mycobacterium tuberculosis, used for intradermal testing of subjects to identify those infected with tubercle bacilli. It gives rise to a delayed type of reaction at the test site. Paedatricians as well as other clinicians use this test as an aid to the diagnosis of tuberculosis in individuals. However, epidemiologists and health planners carry out surveys in communities to find out both prevalence and incidence of infection in the community by using tuberculin test. From prevalence rates, “risk of infection” could be estimated. Risk rates, computed at various points, not only provide information on tuberculosis situation in the examined community at various points, but also throw light on the trend of tuberculosis in the community.
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