Bacteria

Gram Negative Bacteria

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Gram Negative Bacteria, Gram-Negative Bacteria, Gram Stain Negative, Gram Negative Rod, Gram Negative Bacilli, Gram Negative Coccobacilli, Gram Negative Cocci

  • See Also
  1. Bacteria
  2. Gram Positive Bacteria
  3. Anaerobic Bacteria
  4. Mycobacteria
  5. Intracellular Pathogen
  6. Antibiotic
  • Definitions
  1. Gram Negative Bacteria
    1. Bacteria that do not retain crystal violet stain, and stain pink on microscopy with gram's method
    2. Like Gram Positive Bacteria, a peptidoglycan cell wall surrounds the plasma membrane of Gram Negative Bacteria
    3. Gram Negative Bacteria have an additional outer membrane of lipopolysaccharides protecting the cell wall
  • Causes
  • Gram Negative Rods
  1. Anaerobes
    1. Bacteroidaceae (e.g. Bacteroides fragilis)
  2. Facultative Anaerobes
    1. Enterobacteriaceae (enteric Bacteria such as Escherichia coli)
    2. Vibrionaceae (e.g. Vibrio Cholerae)
    3. Pasteurellae (e.g. HaemophilusInfluenzae)
  3. Aerobes
    1. Pseudomonadaceae (e.g. Pseudomonas aeruginosa)
  • Causes
  • Gram Negative Cocci
  1. Aerobes
    1. Neisseriaceae (e.g. Neisseria Meningitidis, Neisseria gonorrhoeae)
    2. Moraxella catarrhalis
  1. Rickettsiae (e.g. Rickettsia)