<prompt> Acid fast staining can be positive with?Tubercle bacilliNocardiaLipofuschinAll  <response>: Ans. d All.Ref. Microbiology by Ananthnarayan, 7th357; Harsh Mohan, Pathology, 4th ed., 32ACID FAST STAINING IS POSITIVE with Mnemonic MMC BLINC :- Mycobacterium tuberculosis, - Mycobacterium leprae, - Cyclospora, - Bacterial spores, - Lipofuschin pigment,- Isospora, - Nocardia, - Cryptosporidium.Educational points: Nocardia are aerobic, crooked, branching, beaded, gram ve and partially acid fast filaments on microscopy. TMP- SMX is Rx of choice. Lipofuschin is wear and tear lipid pigment in cells and can be stained by fat stains but differs from other lipids in being fluorescent and acid fast. 