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Egg Drop Syndrome Virus (EDSV)
Egg Drop, EDS
Egg drop syndrome virus (EDSV) is disease that affects laying hens, causing them to lay abnormal eggs. EDS is caused by an adenovirus which is prevalent in many wild and domestic ducks and geese. It is believed that the syndrome was first introduced into chickens from contaminated vaccine. Heavier broiler-type breeds and brown egg producing chickens are most severely affected by the disease. Often, the first sign of infection is a change in the color of the egg, quickly followed by production of shell-less and soft-shelled eggs.