| Species/Subspecies: | Staphylococcus pseudintermedius | ||||||||||||
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| Category: | Causes hemolysis | ||||||||||||
| Etymology: | Genus name: bunch of grape-like cocci (coccus means a grain or berry) Species epithet: refers to the similarity with S. intermedius. | ||||||||||||
| Significance: | [Very important] | ||||||||||||
| Taxonomy: | Class Bacilli Order Bacillales Family Staphylococcaceae Genus Staphylococcus |
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| Type Strain: | LMG 22219 = CCUG 49543 | ||||||||||||
| Macromorphology (smell):
| Small round, greyish white, opaque colonies (1-2 mm in diameter) with smoth margin.
Does often give a double hemolysis zone on blood agar [clear (complete) narrow inner zone and a broad turbid (patial) outer zone].
The complete hemolysis of Staphylococcus spp. is caused by an α-hemolysin and the partial hemolysis by a β-hemolysin. Cf. Streptococcus spp. |
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| Micromorphology:
| Cocci (0.5-1.5 µm in diameter), arranged in groups | ||||||||||||
| Gram +/Gram -: | G+ | ||||||||||||
| Metabolism: | Facultatively anaerobic | ||||||||||||
| Catalase/Oxidase: | +/- | ||||||||||||
| Other Enzymes: | Coagulase +, DNase +, esculinase - and urease + | ||||||||||||
| Biochemical Tests: | Voges-Proskauer + | ||||||||||||
| Fermentation of carbohydrates:
| D-glucose + lactose + maltose + L-rhamnose - sucrose + L-arabinose - cellobiose - D-mannitol w salicin - trehalose + glycerol w inulin - raffinose - D-sorbitol - starch - Other carbohydrates: D-xylose -. |
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| Spec. Char.: | |||||||||||||
| Special Media:
| S. pseudintermedius is a lactose fermenter, which can easily be seen on both purple agar och CLED agar. | ||||||||||||
| Disease: |
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| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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About 70 species and subspecies have been described within the genus Staphylococcus. S. pseudintermedius is closely related to S. intermedius, S. delphini and S. schleiferi. | ||||||||||||
| Comment: | S. pseudintermedius is coagulase-positive and can, therefore, be confused with primarely S. intermedius, but also with S. aureus. Purple agar with maltose is used for differentiation of S. aureus and S. pseudintermedius (see above). | ||||||||||||
| Reference(s): | No. 56 | ||||||||||||
| Updated: | 2023-03-08 |