![]() Some species are used in the production of antibiotics, vaccines, and other pharmaceuticals, while others play a crucial role in food production, contributing to the creation of cheeses, yogurts, and other fermented foods.Ģ. Gram-positive bacteria can be further classified into different groups based on their morphological and physiological characteristics. They can retain the crystal violet stain used in the Gram staining process due to their thick peptidoglycan layer. Gram-Positive Bacteria: This group of bacteria has a thick peptidoglycan layer in their cell walls, which stains purple when subjected to the Gram stain test. Examples include Treponema pallidum and Borrelia burgdorferi.īacteria are primarily categorized into two groups based on their response to the Gram stain test:ġ.
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