Meningoencephalitis and other conditions associated with Histophilus ovis infection in sheep

Aust Vet J. 1991 Dec;68(12):387-90. doi: 10.1111/j.1751-0813.1991.tb03104.x.

Abstract

Histophilus ovis was isolated from 29 sheep in 20 flocks and 2 artificial insemination (AI) centres in southern New South Wales from 1984 to 1990. The clinical and pathological findings were consistent with previous reports and included polyarthritis (7 flocks), epididymo-orchitis (5), meningoencephalitis (3), pneumonia (3), septicaemia (2), mastitis (1) and metritis (1). Six sheep had meningoencephalitis, a syndrome not previously associated with H ovis infection in sheep, which was similar pathologically to thromboembolic meningoencephalitis in cattle, caused by the related organism, Haemophilus somnus. H ovis was isolated from the semen of 12-month-old rams in a flock that had polyarthritis due to H ovis, in 4-month-old ram lambs and from the uterus of a ewe in a flock that had sporadic cases of H ovis septicaemia.

MeSH terms

  • Animals
  • Arthritis, Infectious / epidemiology
  • Arthritis, Infectious / microbiology
  • Arthritis, Infectious / pathology
  • Arthritis, Infectious / veterinary
  • Bacteremia / epidemiology
  • Bacteremia / microbiology
  • Bacteremia / pathology
  • Bacteremia / veterinary
  • Brain / microbiology
  • Brain / pathology
  • Disease Outbreaks / veterinary*
  • Epididymitis / epidemiology
  • Epididymitis / microbiology
  • Epididymitis / pathology
  • Epididymitis / veterinary
  • Female
  • Gram-Negative Bacteria / classification
  • Gram-Negative Bacteria / isolation & purification*
  • Gram-Negative Bacterial Infections / epidemiology
  • Gram-Negative Bacterial Infections / microbiology
  • Gram-Negative Bacterial Infections / pathology
  • Gram-Negative Bacterial Infections / veterinary*
  • Male
  • Mastitis / epidemiology
  • Mastitis / microbiology
  • Mastitis / pathology
  • Mastitis / veterinary
  • Meningoencephalitis / epidemiology
  • Meningoencephalitis / microbiology
  • Meningoencephalitis / pathology
  • Meningoencephalitis / veterinary*
  • New South Wales / epidemiology
  • Orchitis / epidemiology
  • Orchitis / microbiology
  • Orchitis / pathology
  • Orchitis / veterinary
  • Pneumonia / epidemiology
  • Pneumonia / microbiology
  • Pneumonia / pathology
  • Pneumonia / veterinary
  • Sheep
  • Sheep Diseases / epidemiology*
  • Sheep Diseases / microbiology
  • Sheep Diseases / pathology