Comparison Between Acid Fast and Non Acid Fast Bacteria

By BNO Team Published on May 20, 2024 1 min readby BNO Team

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Comparison between Acid Fast and Non Acid Fast Bacteria

Characteristics	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.
Stain	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.
Example	Mycobacterium tuberculosis, Mycobacterium leprae,Mycobacterium avium-intracellulare complex, and Nocardia species.	Escherichia coli is an example of acid fast bacteria.

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