Veterinary bacteriology: information about important bacteria
|Categories:||Zoonotic; causes hemolysis; spore forming|
|Etymology:||Genus name: a small spindle. |
Species epithet: breaking through, breaking in pieces.
|Type Strain:||ATCC 13124 = CCUG 1795 = NCTC 8237.|
||Form large translucent, flat and filamentous colonies (about 5 mm in diameter) with irregular edges. Fluoresces in red on blood agar in the presence of carbohydrates. Most strains give a double hemolysis zone on bovine blood agar.|
|Micromorphology:||Large non-motile rods (0.6-2.4 x 1.3-19.0 µm). Form spores, but this is rarely seen. They are large oval and central or subterminal.|
|Gram +/Gram -:||G+|
|Metabolism:||Anaerobic (but not very strict).|
|Other Enzymes:||Esculinase v, lechithinase +, tryptophanase -.|
|Fermentation of carbohydrates:||
Other carbohydrates: Fructose +, galactose (+), mannose +, ribose v
|Spec. Char.:||Optimal growth temperature: 43-47°C.|
||Tryptose Sulfite Cycloserine agar (TSC agar) is used for isolation and enumeration of both vegetative cells and spores of C. perfringens in food and clinical samples.|
|Disease:||Necrotic enteritis in broiler chickens. Food poisoning.
|Hosts:||Chicken, pig, ruminants, horse, rabbit, dog, humans etc.|
|Virulence Factors:||Hemolysins (α-, δ-and θ-toxin), etc.|
|16S rRNA Seq.:|
||About 180 differens species have been descibed within genus Clostridium. C. chauvoei C. perfringens belongs to the same phylogenetic group of clostridia as, among others, C. chauvoei and C. septicum.|
|Comment:||C. perfingens is divided in different groups depending upon which enterotoxins that are produced. Type A produces α-toxin. Type B produces α-, β-and ε-toxin. Type C produces α-and β-toxin. Type D produces α-and ε-toxin. Type E produces α-and ι-toxin.|
|Reference(s):||No. 8, 35, 33|
|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...