Gram-Negative Aerobic Bacteria

**Definition:** A large group of aerobic bacteria which show up as pink (negative) when treated by the gram-staining method. This is because the cell walls of gram-negative bacteria are low in peptidoglycan and thus have low affinity for violet stain and high affinity for the pink dye safranine.

**Tree numbers:** - B03.440.400

**Synonyms:** - Gram Negative Aerobic Bacteria