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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− | **** Klebsiella |
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+ | ! |
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− | **** Enterobacter |
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+ | |- |
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− | *** Slow fermenters |
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+ | | rowspan="2" |fermenter |
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− | **** Citrobacter |
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+ | |fast |
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− | **** Serratia |
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+ | | colspan="2" rowspan="2" | |
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− | ** Non-lactose-fermenting |
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+ | |[[Escherichia coli]], [[Klebsiella]], [[Enterobacter]] |
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− | *** Oxidase-positive |
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+ | |- |
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− | **** Pseudomonas spp. |
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+ | |slow |
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− | **** Burkholderia spp. |
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+ | |[[Citrobacter]], [[Serratia]] |
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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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− | ***** Helicobacter pylori |
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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]], [[Burkholderia]] |
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− | ***** Campylobacter |
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+ | |- |
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− | ***** Shigella |
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+ | |negative |
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− | ***** Salmonella |
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+ | |positive |
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− | ***** Yersinia |
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+ | |[[Helicobacter pylori]], [[Proteus mirabilis]] |
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⚫ | |||
+ | |- |
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+ | |negative |
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+ | |negative |
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+ | |[[Campylobacter]], [[Shigella]], [[Salmonella]], [[Yersinia]] |
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+ | |} |
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+ | *[[Fusobacterium]] |
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[[Category:Gram-negative bacteria]] |
[[Category:Gram-negative bacteria]] |
Latest revision as of 14:46, 17 February 2022
- 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, Enterobacter | ||
slow | Citrobacter, Serratia | |||
non-fermenter | positive | Pseudomonas, Burkholderia | ||
negative | positive | Helicobacter pylori, Proteus mirabilis | ||
negative | negative | Campylobacter, Shigella, Salmonella, Yersinia |
Cocci
Coccobacilli
- Haemophilus (S. aureus satellite colonies)
- Pasteurella
- Brucella
- Bordetella pertussis
- Francisella tularensis
- Legionella