A family of coccoid to rod-shaped nonsporeforming, gram-negative, nonmotile, facultatively anaerobic bacteria that includes the genera ACTINOBACILLUS; HAEMOPHILUS; MANNHEIMIA; and PASTEURELLA.

A proposed genus with one species: Histophilus ovis.

Synonyms: Pasteurellaceae, Histophilus, txid712, txid214906