|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:||
||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 taxa within the classification category phylum|
During October 2021, an article was published by A. Oren och G.M. Garrity, in which new names are proposed for a number of taxa within the classification category phylum. This has resulted in many discussions in social media about whether it was really necessary to make these changes, which have created confusion among microbiologists and other professionals who come into contact with bacteriology.Published 2022-09-28. Read more...