Gram-negative bacteria: Difference between revisions
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− | * |
+ | *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 === |
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+ | {| class="wikitable" |
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− | ** Lactose-fermenting |
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+ | ! colspan="2" |Lactose |
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− | *** Fast fermenters |
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+ | !Oxidase |
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− | **** [[Escherichia coli]] |
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+ | !Urease |
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⚫ | |||
+ | ! |
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⚫ | |||
+ | |- |
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− | *** Slow fermenters |
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+ | | rowspan="2" |fermenter |
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⚫ | |||
+ | |fast |
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⚫ | |||
+ | | colspan="2" rowspan="2" | |
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− | ** Non-lactose-fermenting |
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+ | |[[Escherichia coli]], [[Klebsiella species]], [[Enterobacter species]] |
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− | *** Oxidase-positive |
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+ | |- |
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⚫ | |||
+ | |slow |
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− | **** [[Burkholderia species]] |
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+ | |[[Citrobacter species]], [[Serratia species]] |
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− | *** Oxidase-negative |
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+ | |- |
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− | **** Urease-positive |
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+ | | colspan="2" rowspan="3" |non-fermenter |
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⚫ | |||
+ | |positive |
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− | ***** [[Proteus mirabilis]] |
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+ | | |
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− | **** Urease-negative |
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− | + | |[[Pseudomonas species]], [[Burkholderia species]] |
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+ | |- |
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− | ***** [[Shigella species]] |
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+ | |negative |
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− | ***** [[Salmonella species]] |
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+ | |positive |
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− | ***** [[Yersinia species]] |
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⚫ | |||
⚫ | |||
+ | |- |
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− | ** Neisseria |
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+ | |negative |
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⚫ | |||
+ | |negative |
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− | *** [[Neisseria gonorrheae]] |
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+ | |[[Campylobacter species]], [[Shigella species]], [[Salmonella species]], [[Yersinia species]] |
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⚫ | |||
+ | |} |
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⚫ | |||
+ | |||
− | ** [[Pasteurella species]] |
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⚫ | |||
− | ** [[Brucella species]] |
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+ | |||
⚫ | |||
− | * |
+ | *[[Neisseria species]] |
− | ** |
+ | **[[Neisseria meningitidis]] |
⚫ | |||
⚫ | |||
+ | |||
− | ** [[Bacteroides species]] |
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⚫ | |||
+ | |||
⚫ | |||
⚫ | |||
⚫ | |||
⚫ | |||
+ | *[[Francisella tularensis]] |
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+ | |||
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+ | |||
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[[Category:Gram-negative bacteria]] |
[[Category:Gram-negative bacteria]] |
Revision as of 09:10, 20 August 2020
- 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 | Oxidase | Urease | ||
---|---|---|---|---|
fermenter | fast | Escherichia coli, Klebsiella species, Enterobacter species | ||
slow | Citrobacter species, Serratia species | |||
non-fermenter | positive | Pseudomonas species, Burkholderia species | ||
negative | positive | Helicobacter pylori, Proteus mirabilis | ||
negative | negative | Campylobacter species, Shigella species, Salmonella species, Yersinia species |
Cocci
Coccobacilli
- Haemophilus species (S. aureus satellite colonies)
- Pasteurella species
- Brucella species
- Bordatella pertussis
- Francisella tularensis
- Legionella species