Gram-positive

Gram-positive bacteria are stained a blue-violet color in the Gram-staining procedure because roughly 90% of their cell wall comprises peptidoglycan. A Gram-positive bacterium can contain more than 20 layers of peptidoglycan within the cell wall. Common Gram-positive include:
Cocci: Enterococcus, Staphylococcus, Streptococcus, .
Rods: Bacillus, Bifidobacterium, Clostridium, Corynebacteria, Erysipelothrix, Lactobacillus, Listeria
Branching: Actinomycetes, Nocardia

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