Mycobacterium tuberculosis to grow end to end giving them a rope or cord-like appearance when viewed on a stained slide through a microscope.

If definite Acid Fast Bacilli are seen, report it as AFB positive. But, it is better to report the result quantitatively as follows: > 10 AFB/high power field                ...

Mycobacterium tuberculosis organisms are identified by their red color on acid-fast staining (Ziehl–Neelsen stain)   The granulomas of tuberculosis tend to contain necrosis ...