Submitted to: Avian Tumor Viruses Symposium
Publication Type: Proceedings
Publication Acceptance Date: July 21, 1997
Publication Date: N/A
Technical Abstract: Avian leukosis virus (ALV) is the most common naturally occurring avian retrovirus associated with neoplastic diseases and other production problems in chickens. It is now established that the economic loss in productivity due to ALV infection is greater than that from tumors. Although ALV is capable of inducing a variable incidence of a variety of neoplasms, lymphoid leukosis (LL) is the most common naturally occurring B-cell lymphoma of chickens caused by ALV. However, a novel subgroup (J) ALV was found to be associated with myelocytomatosis in meat-type chickens in the United Kingdom. This presentation describes the isolation, incidence, and some characteristics of a subgroup J-like ALV (ALV-J) isolated from broiler breeder flocks experiencing a relatively high incidence of myelocytomastosis in the United States.