|Etymology:||Genus name: tissue friend.
Species epithet: of sleep (refers to one of the disease conditions).
|Old Species Name(s):||Haemophilus agni, Histophilus ovis, Haemophilus somnus, Haemophilus somnifer|
|Type Strain:||8025 = ATCC 43625 = CCUG 36157.|
||Some strains are haemolytic. Forms small colonies (0.2-0.5 mm in diameter), which contain a yellow pigment.|
|Micromorphology:||Small nonmotile rods|
|Gram +/Gram -:||G-|
|Other Enzymes:||Esculinase -, tryptophanase (+), urease -.|
|Fermentation of carbohydrates:||
|Hosts:||Cattle, sheep, goats|
|Disease:||Acute, often fatal, septicemic disease involving the cardiovascular, musculoskeletal, nervous or respiratory systems (bovine respiratory disease).|
|16S rRNA Seq.:|
||Only one species have been described within genus Histophilus, which is relatively close to Nicoletella semolina, which also is a single species within its genus.|
|Comment:||X- and V-factor are not requirements for growth in contrast to other bacteria belonging to genus Haemophilus|