Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: ray rod. |
Species epithet: from pleuropneumonia (lung sac).
|Significance:||During the 1990th the desease has decreased in Sweden, but during the latest years, the disease has increased again. Acute cases are often fatal.
|Alternative Species Name(s):||Haemophilus parahaemolyticus, Haemophilus pleuropneumoniae|
|Type Strain:||Shope 4074 = ATCC 27088 = CCUG 12837, 41656 och NCTC 12370.|
||Grayish white colonies on chocolate agar, about 3 mm in diameter, most strains produce a thin zone of hemolysis on blood agar|
|Micromorphology:||Small (0.3-0.5 x 0.6-1.4 µm) nonmotile coccoid or rod shaped cells, appears alone, in pairs or as short chains|
|Gram +/Gram -:||G-|
|Other Enzymes:||Esculinase -, ornithine decarboxylase -, tryptophanase -, urease +|
|Biochemical Tests:||Hydrogen sulfide +|
|Fermentation of carbohydrates:||
Other carbohydrates: Dulcitol -, D-fructose +, D-galactose +, inositol -, D-mannose +, melibiose -.
||X- and V-factor tests can be used to differentiate biotype I from biotyep II of A. pleuropneumoniae.|
|Spec. Char.:||Most strains of A. pleuropneumoniae, biotype I require V-factor (NAD or NADPH) for growth, while strains of biotype II does not require this factor.|
|16S rRNA Seq.:|
||About 18 species have been described within genus Actinobacillus, but the relationship between members within the closely related genera Actinobacillus, Haemophilus, Mannheimia and Pasteurella is very uncertain since none of these genera forms monophyletic clusters.|
|Reference(s):||No. 13, 95, 110|
|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...