Veterinary bacteriology: information about important bacteria
|Categories:||Spore forming; motile|
|Etymology:||Genus name: a small spindle. |
Species epithet: named after the American bacteriologist F.G. Novy.
|Type Strain:||ATCC 17861 = NCTC 13029.|
||Form medium sized colonies (1-5 mm in diameter), which can easily spread as a contiuous film over the entire plate (the bacteria "swarm").|
|Micromorphology:||Large rods, which usually are motile. Produce oval spores, which are terminal or subterminal and may cause the cell to swell.|
|Gram +/Gram -:||G+|
|Other Enzymes:||Esculinase -, lecithinase (+), tryptophanase (+).|
|Fermentation of carbohydrates:||
Other carbohydrates: Xylose -.
|Disease:||Infectious necrotic hepatitis (black disease)
|Virulence Factors:||Necrotizing α-toxin, β-toxin (lechitinase), γ-toxin (phopholipase C), δ-toxin (oxygen-labile hemolysin), ε-toxin (lipase), ζ-toxin (hemolysin), η toxin (tropomyosinase) and θ-toxin (lipase).|
|16S rRNA Seq.:|
||About 180 differens species have been descibed within genus Clostridium. C. novyi is very closely related (phylogenetically) to C. botulinum group III and C. haemolyticum.|
|Comment:||Two types of C. novyi, A and B, have been defined. Both type A and B produce α-toxin, but type A also produces γ-and ε-toxin. Some strains of type A also produces δ-toxin. Type B strains produce β-, ζ- and η-toxin. Some type B strains also produce θ-toxin.|
|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...