The Gram stain is used for bacteria that have cell walls while the acid-fast stain is used primarily for wall-less bacteria.

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The Gram stain is used to differentiate between two main groups of bacteria based on differences in their cell walls. The acid-fast stain, on the other hand, is used to detect bacteria that have a waxy lipid layer in their cell wall, which makes them resistant to staining with traditional methods. Both stains can be used on bacteria with or without cell walls, but their primary purposes are different.

The Gram Stain Is Used for Bacteria That Have Cell