All of the followoing non-mycobacterial microorganisms display acid fastness, EXCEPT:
Microorganisms other than mycobacteria that display some acid fastness includes Nocardia, Rhodococcus, Legionella micdadei, Protozoa Isospora and Cryptosporidium. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 1340
Nocardia
Fusobacterium nucleatum
Rhodococcus
Isospora