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Egg-drop syndrome 76 in Danish poultry
Nordisk Veterinaermedicin
|November 1, 1978
Summary
Egg Drop Syndrome 76 (EDS 76) outbreaks occurred in Danish broiler parent flocks imported from Ireland. The infectious agent appears endemic in Danish ducks and spread horizontally between flocks, impacting broiler health.
Area of Science:
- Veterinary Virology
- Avian Pathology
- Disease Epidemiology
Background:
- Egg Drop Syndrome 76 (EDS 76) is a significant concern in poultry production.
- Previous outbreaks in Denmark were not documented in commercial hen flocks.
Purpose of the Study:
- To report and analyze three recent cases of EDS 76 in Danish broiler parent flocks.
- To investigate the origin and transmission dynamics of EDS 76 in these outbreaks.
Main Methods:
- Serological examinations of affected flocks.
- Tracing the origin of imported poultry.
- Observing disease progression and spread within and between flocks.
Main Results:
- All affected flocks originated from Ireland, imported as day-old chicks.
- Evidence suggests horizontal transmission between flocks from different foreign suppliers.
- Trans-ovarial transmission of EDS 76 virus was observed, potentially contributing to other diseases in broiler progeny.
Conclusions:
- EDS 76 poses a continued threat to poultry health, with potential for international spread.
- Danish duck populations may act as a reservoir for the EDS 76 virus.
- The virus likely played a role in the development of other diseases in affected broiler flocks.