Chicken anaemia virus

Chicken anaemia virus, or CAV, is a virus that affects poultry. CAV causes anaemia, bone marrow atrophy, and severe immunosuppression. Clinical signs of infection of CAV is predominantly found in young chicks due to maternal antibodies present in most adult chickens. The disease is rare today because of the widespread practice of vaccinating breeders, but the subclinical form of the disease is ubiquitous.