Difference between revisions of "Rabbit Haemorrhatic Disease Virus"

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|linkpage =Viruses
 
|linkpage =Viruses
 
|linktext =VIRUSES
 
|linktext =VIRUSES
|sublink1=Orthomyxoviridae
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|sublink1=Caliciviridae
|subtext1=INFLUENZA
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|subtext1=CALICIVIRUSES
 
|pagetype =Bugs
 
|pagetype =Bugs
 
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Revision as of 20:02, 16 October 2008



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VIRUSES
CALICIVIRUSES



Antigenicity

  • Single serotype
  • Related to European Brown Hare Syndrome Virus

Hosts

  • Rabbits
  • Hares seroconvert without disease

Pathogenesis

  • High and rapid mortality (within 2 days of contraction)
  • Systemic disease, including:
    • Hemorrhage
    • Generalized congestion, especially in the lungs and trachea
    • Liver necrosis
  • Clinical signs:
    • Depression
    • Anorexia
    • Muscular tremors and incoordination

Epidemiology

  • Infection of domestic rabbits occurs through contact with wild rabbits
  • First described in China in 1984
  • Reported in Europe since 1992, though current opinion holds a less pathogenic variant to be circulating in the wild population, affording some protection

Diagnosis

  • Post-mortem lesions include hepatic necrosis and enlargement of the spleen
  • Serology may be performed (ELISA and PCR)

Control

  • Until 1996, RHDV was notifiable and slaughter was indicated
  • Vaccination now exists and has proven effective
    • Inactivated whole virus or recombinant capsid protein