is salmonella typhimurium gram negative ?
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Patricia T. Stanton
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Yes, Salmonella typhimurium is classified as a Gram-negative bacterium. This means that its cell wall structure does not retain the purple color of the crystal violet stain used in the Gram staining technique. Instead, it appears pink or red when counterstained with safranin, indicating that it has a thinner layer of peptidoglycan in its cell wall compared to Gram-positive bacteria.