Egg drop syndrome - 76 (EDS)
- Horizontal transmission: direct by exudates, fundamentally from faeces.
- Vertical transmission: transmission by egg is important, because apparently there is a relationship between hormonal changes during the beginning of laying and viral excretion.
Lack of laying for approximately 3 to10 weeks. The drop percentage is variable and it is not usual to recuperate the levels obtained before infection. Eggshell colour and quality are affected.
Affects the oviduct and shell gland producing inflammatory alterations.
- Causal agent identification: viral isolation.
- Serological: ELISA, IHA.
TREATMENT, PREVENTION AND CONTROL:
There is no effective treatment and the most widely-used option for disease prevention is vaccination with inactivated vaccines during rearing.