Derzsy's disease

Derzsy's disease is caused by Anseriform dependoparvovirus 1, in the Parvoviridae family. It affects geese and Muscovy ducks.

Anseriform dependoparvovirus 1
Virus classification Edit this classification
(unranked): Virus
Realm: Monodnaviria
Kingdom: Shotokuvirae
Phylum: Cossaviricota
Class: Quintoviricetes
Order: Piccovirales
Family: Parvoviridae
Genus: Dependoparvovirus
Species:
Anseriform dependoparvovirus 1

The virus is shed in the faeces and thus transmission is horizontal, via the direct faecal-oral route and also indirectly via fomites. Vertical transmission is also possible.

Clinical disease only occurs in young geese and ducks between birth and 4–5 weeks of age.

Epidemiology

Several genotypes have been described.[1] The genotype is based upon the sequence of the VP3 protein.

Clinical signs and diagnosis

Some signs of Derzsy's disease in geese include prostration and death in acutely affected goslings, reduced feed intake, excessive water intake, swollen eyelids, eye and nasal discharge, white diarrhea, the presence of a membrane covering the tongue, loss of down, and reddening of the skin.[2]

Acute disease leads to death in most birds between the ages of 7–10 days. Clinical signs are quite limited in those cases. Older animals tend to show severe systemic and neurological signs and diarrhoea. Adults do not show any clinical signs.[3]

Viral isolation should be attempted for diagnosis, and immunofluorescence and electron microscopy can confirm the viral infection. Pathological changes may also help the diagnosis.[3]

Treatment and control

No treatment exists for the viral infection. Antibiotics may help prevent secondary infections.[3]

Vaccination is available in different forms, usually for naive flocks.[3]

Good biosecurity measures should be maintained including adequate quarantine, isolation, separation of different age groups and disinfection.[3]

References
  1. Liu HM, Wang H, Tian XJ, Zhang S, Zhou XH, Qi KZ, Pan L (2013) Complete genome sequence of goose parvovirus Y strain isolated from Muscovy ducks in China. Virus Genes
  2. "Goose Parvovirus (Derzsy's Disease)". The Poultry Site. Retrieved 28 February 2023.
  3. Derzsy's Disease expert reviewed and published by WikiVet, accessed 10 October 2011.
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