Gram-negative bacteria: Difference between revisions
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Revision as of 01:16, 15 August 2019
Gram-negative bacteria
Definition
- Bacteria that have a thin peptidoglycan layer in the cell wall and therefore stain [pink or red] on Gram stain
- Outer membrane contains lipopolysaccharide (LPS, which consists of lipid A, core polysaccharide, and O antigen)
Classification
- Bacilli
- Lactose-fermenting
- Fast fermenters
- Escherichia coli
- Klebsiella
- Enterobacter
- Slow fermenters
- Citrobacter
- Serratia
- Fast fermenters
- Non-lactose-fermenting
- Oxidase-positive
- Pseudomonas spp.
- Burkholderia spp.
- Oxidase-negative
- Urease-positive
- Helicobacter pylori
- Proteus mirabilis
- Urease-negative
- Campylobacter
- Shigella
- Salmonella
- Yersinia
- Urease-positive
- Oxidase-positive
- Lactose-fermenting
- Cocci
- Neisseria
- N. meningitidis
- N. gonorrheae
- Neisseria
- Coccobacilli
- Haemophilus (S. aureus satellite colonies)
- Pasteurella
- Brucella
- Bordatella pertussis
- Francisella tularensis
- Legionella
- Anaerobes
- Bacteroides
