Haemophilus somnus

• Cattle
  • Haemophilus sommus in Enzootic pneumonia of calves
  • Septicaemia
  • Causes infectious thromboencephalitis, bronchopneumonia and sporadic reproductive tract infections in cattle 1-3 years old
  • Found in the USA and Europe, including UK
  • Causes a meningoencephalitis with fibrinous arterial thrombosis and necrosis
  • Causes fever, staggering and dyspnoea, progressing to somnolence, paralysis and death
  • Mortality can be high
• Sheep
  • Epididymitis in young rams
  • Vulvitis, mastitis and reduced reproductive performance in ewes
  • Septicaemia, arthritis, meningitis and pneumonia in lambs