Egg Drop syndrome '76 in Bolivia

Area of Science:

• Veterinary Virology
• Avian Pathology

Background:

• Egg Drop Syndrome '76 (EDS '76) is a significant poultry disease.
• The disease causes substantial economic losses in commercial laying birds.
• EDS '76 had not been previously reported in Bolivia.

Purpose of the Study:

• To diagnose and characterize outbreaks of EDS '76 in Bolivia.
• To investigate the serological evidence of EDS '76 infection.
• To identify the probable source and spread of the virus.

Main Methods:

• Clinical case assessment of affected poultry farms.
• Serological testing using haemagglutination inhibition (HI) test.
• Analysis of antibody titres in serum samples from affected and unaffected birds.

Main Results:

• Four outbreaks of EDS '76 were confirmed in Santa Cruz, Bolivia.
• High antibody titres to EDS '76 virus were detected in affected birds (92.1%).
• Unaffected birds and pre-lay birds showed predominantly negative antibody titres.

Conclusions:

• The study confirmed the introduction and spread of EDS '76 in Bolivia.
• Imported day-old chicks from endemic regions are the likely source of infection.
• Effective control measures are crucial to prevent further dissemination.