<prompt> Rapid test used by WHO for tuberculosis ?Quanteferon goldELISPOTXpe MTBSputum AFB  <response>: Ans. is d i.e., Sputum AFB Sputum smear microscopy is the quickest and easiest procedure. But it lacks both sensitivity and specificity. Smears are stained by ziehl-Neelsen acid-fast stain. Sputum smear examination by AFB stain is the method of choice for case finding. Note : Genexpe MTBRIF is also a fast test results within 90 minutes, but it is not routinely recommended by WHO. 