A microbiologist Gram stains a bacterium and finds the bacterium to be blue to purple in color,this identifies the

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A bacterium that is blue to purple after a Gram staining procedure is identified as a Gram-positive bacterium. Gram-positive bacteria have a thick peptidoglycan layer in their cell wall, which retains the crystal violet stain used in the staining procedure. Gram-negative bacteria have a thinner peptidoglycan layer and a more complex cell wall structure, which causes the stain to wash out during the staining process, resulting in a pink to red coloration. The color of the bacteria does not provide information about the species or whether it causes disease in humans.

A Microbiologist Gram Stains a Bacterium and Finds the Bacterium