Septicemia and meningoencephalitis in pastured cattle caused by a Haemophilus-like organism ("Haemophilus somnus").
Septicemia and meningoencephalitis developed in 10 pastured cattle 7 months to 3 years of age. Two unrelated herds were involved. Necropsy findings were similar to those previously reported in cattle infected with a Haemophilus-like organism, including multifocal hemorrhages in some muscles, suppurative polyarthritis, and multifocal hemorrhagic thrombi in the brain. A Haemophilus-like organism was isolated from one animal. It was characterized by growth on blood agar or tryptose agar plus a feeder streak under raised carbon dioxide tension, and lack of response to Haemophilus growth factors X and V.
D000818:Animals; D001921:Brain / Q000473:pathology; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology* / Q000473:pathology; D005260:Female; D006190:Haemophilus / Q000254:growth & development / Q000302:isolation & purification; D006192:Haemophilus Infections / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D008590:Meningoencephalitis / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D018805:Sepsis / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*