Comparison between Acid Fast and Non Acid Fast Bacteria
|Acid Fast bacteria
|Non Acid Fast Bacteria
|Resistance to decolonization
|Acid Fast bacteria resist the decolorizing by acid after staining.
|Non Acid Fast Bacteria readily resist the decolorizing by acid after staining.
|Acid Staining color
|Acid Fast bacteria appear in pink or red color.
|Non Acid Fast bacteria appear in blue color.
|It retains the color of primary stain, carbol fuchsin.
|It retains the color of counterstain, methylene blue.
|Presence of Mycolic acid
|Mycolic acid is present in cell wall.
|Mycolic acid is absent in cell wall.
|Mycobacterium tuberculosis, Mycobacterium leprae,Mycobacterium avium-intracellulare complex, and Nocardia species.
|Escherichia coli is an example of acid fast bacteria.