Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: twisted (like a chain) coccus (coccus means a grain or a berry and referrs to any spherical microorganism)|
Species epithet: of an udder.
|Significance:||In Sweden, the proportion of S. uberis -induced acute clinical mastitis constituted 11% over the past 10 years.
|Type Strain:||ATCC 19436 = CCUG 17930 och 27579 = NCTC 3858.|
||Small (about 1 mm in diameter) transluscent ond circular colonies with smoth edge after incubation for 24 h at 37°C on blood agar. Gives no hemolysis (referred to as gamma-hemolysis) on blodagar. Some strains may cause alpha-hemolysis.|
|Micromorphology:||Nonmotile cocci (less than 2 µm in diameter) in chains or pairs. The chains are often longer if the bacteria originate from a fluid culture.|
|Gram +/Gram -:||G+|
|Other Enzymes:||DNase -, esculinase +, hippuricase +, coagulase -|
|Biochemical Tests:||Voges-Proskauer +|
|Fermentation of carbohydrates:||
Other carbohydrates: amygdalin +, ribose +
||CAMP test negative.|
||SELMA- or SELMA Plus plates are used for cultivation of milk samples when mastitis is suspected.|
|16S rRNA Seq.:|
||About 100 species have been described within the genus Streptococcus. Many species within the genus Enterococcus have earlier been classified as streptococci and, thus, they are closely related. S. uberis is closely related to S. porcinus.|
|Comment:||Belongs to Lancefield's group NG (= non-groupable) streptcocci.|
|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...