Gram-negative bacteria: Difference between revisions

From IDWiki
m (Aidan moved page Gram-negative to Gram-negative bacteria without leaving a redirect)
()
Line 1: Line 1:
= Gram-negative bacteria =

== Definition ==

* Bacteria that have a thin peptidoglycan layer in the cell wall and therefore stain [pink or red] on Gram stain
* 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)
* Outer membrane contains lipopolysaccharide (LPS, which consists of lipid A, core polysaccharide, and O antigen)


= Organisms =
== Classification ==


* Bacilli
* Bacilli
Line 43: Line 39:
* Anaerobes
* Anaerobes
** Bacteroides
** Bacteroides

[[Category:Gram-negative bacteria]]

Revision as of 01:17, 15 August 2019

  • 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)

Organisms

  • Bacilli
    • Lactose-fermenting
      • Fast fermenters
        • Escherichia coli
        • Klebsiella
        • Enterobacter
      • Slow fermenters
        • Citrobacter
        • Serratia
    • Non-lactose-fermenting
      • Oxidase-positive
        • Pseudomonas spp.
        • Burkholderia spp.
      • Oxidase-negative
        • Urease-positive
          • Helicobacter pylori
          • Proteus mirabilis
        • Urease-negative
          • Campylobacter
          • Shigella
          • Salmonella
          • Yersinia
  • Cocci
    • Neisseria
      • N. meningitidis
      • N. gonorrheae
  • Coccobacilli
    • Haemophilus (S. aureus satellite colonies)
    • Pasteurella
    • Brucella
    • Bordatella pertussis
    • Francisella tularensis
    • Legionella
  • Anaerobes
    • Bacteroides