Veterinary bacteriology: information about important bacteria
|Categories:||Causes hemolysis; spore forming; motile|
|Etymology:||Genus name: a small spindle. |
Species epithet: the butyric acid-producing organism from cheese
|Significance:||During cheese production (particularly of Emmentaler, Gouda and Edamer), it is very important that the raw milk does not contain spores of C. tyrobutyricum.
|Type Strain:||ATCC 25755 = CCUG 48315|
|Macromorphology (smell):||Forms small (0.5 mm in diameter) grayish and translucent colonies on blood agar. The colonies are glossy and usually β-hemolytic.|
|Micromorphology:||Rods (1.1-1.6 x 1.9-13.9 µm), which usually are motile (peritrichous).|
|Gram +/Gram -:||G+|
|Other Enzymes:||DNase-, esculinase-, tryptophanase- (= indol-)|
|Fermentation of carbohydrates:||
Fructose is one of the few carbohydrates that is fermented by C. tyrobutyricum.
|Reservoir:||C. tyrobutyricum is present in the environment and raw milk may contain spores of this bacterium.|
|16S rRNA Seq.:||-|
|Comment:||If raw milk, which is used in production of cheese, is contaminater with spores of C. tyrobutyricum, these may germinate. Then, large cracks are formed in the cheese, which tastes and smells bad because butyric acid is produced by C. tyrobutyricum, during the "late-blowing" defect.|
|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...