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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Salmonella enterica
Category: Motile
Etymology: Genus name: named after the American bacteriologist D. E. Salmon.
Species epithet: of the gut.
Significance:  [Very important]   
Alternative Species Name(s):Salmonella choleraesuis
Type Strain: See individual subspecies.
Macromorphology (smell): Medium sized colonies (2-4 mm in diameter).
Micromorphology: Straight rods (0.7-1.5 x 2.0-5.0 µm). Most strains are peritrochous (flagella all over the surface) and ,therfore, motile.
Gram +/Gram -:G-
Metabolism: Facultatively anaerobic
Other Enzymes: Hydrogen sulfide (H2S) +, ornithine decarboxylase +, tryptophanase (indole) -, urease -.
Biochemical Tests: Citrate +, methyl red +, Voges-Proskauer -.
Spec. Char.: See individual subspecies.
Disease:See individual subspecies.
Hosts: See individual subspecies.
Clinical Picture: See individual subspecies.
16S rRNA Seq.:  -
Taxonomy/phylogeny: There are two taxonomic systems for genus Salmonella, but the old system has mainly been abandoned. The names av the different subspecies of Salmonella enterica should accordingly be:  Salmonella enterica subsp. arizonae, Salmonella enterica subsp. diarizonae, Salmonella enterica subsp. enterica, Salmonella enterica subsp. houtenae, Salmonella enterica subsp. indica och Salmonella enterica subsp. salamae.

Only Salmonella enterica subsp. arizonae and Salmonella enterica subsp. enterica are included in VetBact Hundreds of serovars have been identified among these two subspecies and some of those that occur frequently in the latter subspecies are listed in the Term List under Salmonella serovars. .

We strongly recommend the new system to be used.
Link: Salmonella nomenclature


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 VetBact

Published 2023-03-15. Read more...

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