You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Prevalence of TB in a community is estimated by: and explain in detail?
Ans. (a) Tuberculin testRef: K. Park 23rd ed. /185* Tuberculin Test is the only way of estimating the prevalence of infection in a community.# A positive test indicates past or present infection by Mycobacterium tuberculosis.# Remember: a positive tuberculin test is NOT a confirmatory diagnostic of M.TB.* Sputum smear examination (Z-N stain) by direct microscopy is the diagnostic choice for TB case detection.* Chest X-Ray is a supportive diagnostic test for TB.* Montoux test is also a screening test for TB. A positive test indicates current or past infection.