Avian leukosis virus subgroup J-associated myelocytoma in a hobby chicken

The avian leukosis viruses (ALVs) are a major group of retroviruses associated with neoplastic diseases in poultry. The ALV‐J strain was identified as a cause of myelocytomas in broiler breeder and broiler chickens in the UK in the 1980s; however, following eradication of the virus,commercial broilers have remained free of infection since the early 2000s. A pet chicken was submitted to Animal and Plant Health Agency (APHA) in 2013 with a history...