Egg drop syndrome - 76 (EDS)

Strona główna Wiedza Egg drop syndrome - 76 (EDS)

Egg drop syndrome - 76 (EDS)

AETIOLOGY:

Adenovirus EDS-76.

 

TRANSMISSION: 

  • 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. 

 

CLINICAL SIGNS: 

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.

 

LESIONS: 

Affects the oviduct and shell gland producing inflammatory alterations. 

 

DIAGNOSIS: 

  • 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.