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The chemical found in the cell wall of acid-fast organisms, such as Mycobacterium species, is mycolic acid. Mycolic acids are long-chain fatty acids that contribute to the waxy, hydrophobic nature of the cell wall, making it resistant to staining and protecting the bacteria from environmental stresses. In contrast, non-acid-fast organisms typically lack this complex lipid structure, resulting in a different cell wall composition. This unique feature is what allows acid-fast bacteria to retain certain stains, such as the Ziehl-Neelsen stain.

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1w ago

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