<prompt> Epidemic marker of TB ?Sputum AFB positivity rateTuberculin test positivity rateChest x-ray positivity rateNone of the above  <response>: Ans. is a i.e., Sputum AFB Positivity rateCase finding tool of choice for TB is suptum microscopy 4 sputum AFB positivityCase finding tools in TB are :?Sputum microscopyIt is the method of choice.Sputum cultureIt is 2 in impoance after sputum microscopy in a case finding programme.Mass miniature radiographyIt has been stopped as a general measure of case finding.4 Tuberculin testIt is of little value as a case finding tool as it has no diagnostic value.The number of bacilli seen in a smear reflects disease severity and patient infectivity.Therefore, it is impoant to record the number of bacilli seen in each smear. 