Malignant Catarrhal Fever Virus

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VIRUSES
HERPESVIRUSES



Hosts

  • Reservoir species: wildebeest, sheep, each transferring different forms of the virus
    • Innocuous to reservoir hosts
  • Dead end hosts: cows, kudu, some deer

Pathogenesis

  • Sporadically induce a fatal over-active T cell division, where virus encodes anti-apoptotic protein in dead-end host
  • Latent infection
  • Virus excretion increased during periparturient period
  • Clinical signs in cattle:
    • Necrotising lesions in upper respiratory tract, gingiva and eye
    • Lymphocyte proliferation progresses in lymphoid tissue and blood until death

Control

  • Wildebeest should not be stocked in zoos where possible
  • Sheep and deer should be housed separately