| isolation and identification of adenovirus 127, the causative agent of egg drop syndrome (eds), from commercial laying hens in south africa. | a drop in egg production associated with loss of pigment and soft-shelled eggs was experienced on a farm in the western cape. investigations revealed high levels of antibodies against adenovirus 127, the causative agent of egg drop syndrome (eds) in chickens which were not vaccinated against eds. a cytopathic agent was subsequently isolated in chicken embryo liver cell cultures and identified as eds virus by haemagglutination inhibition and neutralization tests. | 1991 | 1664076 |