Rapid test used by WHO for tuberculosis ?
Quanteferon gold
ELISPOT
Xpe MTB
Sputum AFB
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 MTB/RIF is also a fast test (results within 90 minutes), but it is not routinely recommended by WHO.