| Anseriform dependoparvovirus 1 | |
|---|---|
Virus classification 
| |
| (unranked): | Virus |
| Realm: | Monodnaviria |
| Kingdom: | Shotokuvirae |
| Phylum: | Cossaviricota |
| Class: | Quintoviricetes |
| Order: | Piccovirales |
| Family: | Parvoviridae |
| Genus: | Dependoparvovirus |
| Species: | Anseriform dependoparvovirus 1
|
Derzsy's disease is caused by Anseriform dependoparvovirus 1, in the Parvoviridae family. It affects geese and Muscovy ducks.
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.