Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: bunch of grape-like cocci (coccus means a grain or berry)|
Species epithet: refers to the similarity with S. intermedius.
|Type Strain:||LMG 22219 = CCUG 49543|
||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.
||Cocci (0.5-1.5 µm in diameter), arranged in groups|
|Gram +/Gram -:||G+|
|Other Enzymes:||Coagulase +, DNase +, esculinase - and urease +|
|Biochemical Tests:||Voges-Proskauer +|
|Fermentation of carbohydrates:
Comments: Maltose is, however, negative or possible weakly positive under aerobic conditions on agar plates (see Fig. 135:5).
Other carbohydrates: D-xylose -.
||S. pseudintermedius is a lactose fermenter, which can easily be seen on both purple agar och CLED agar.|
|16S rRNA Seq.:|
||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).|
|New names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...