| avian leukosis-sarcoma virus | avian leukosis-sarcoma complex |
|---|---|
| leukosis virus, avian | The type species of avian type c retroviruses (retroviruses type c, avian) producing latent or manifest lymphoid leukosis in fowl. (12 Dec 1998) |
| avian leukosis | A group of transmissible, virus-induced diseases of chickens, characterised by proliferation of immature erythroid, myeloid, or lymphoid cells. It includes both leukaemic and solid-tumour forms. (12 Dec 1998) |
| bovine leukosis virus | A type C retrovirus in the subfamily Retrovirinae, commonly infecting cattle, especially dairy cows; in a small proportion of infected cattle, it will cause enzootic bovine leukosis. Synonym: bovine leukosis virus. (05 Mar 2000) |
| avian leukaemia-sarcoma complex | A term applied to a group of transmissible virus-induced diseases of chickens causing sarcoma, myeloblastosis, erythroblastosis, leukosis, osteopetrosis, and lymphomatosis. These agents are closely related viruses (avian leukosis-sarcoma virus) causing prolferation of immature erythroid, myeloid, or lymphoid cells, a division of the RNA tumour viruses (subfamily Oncovirinae) causing the avian leukosis-sarcoma complex of diseases; the viruses are subgrouped according to antigenic characteristics and growth in defined types of tissue culture cells. Synonym: avian erythroblastosis virus, avian leukosis-sarcoma virus, avian lymphomatosis virus, avian myeloblastosis virus, avian sarcoma virus, fowl erythroblastosis virus, fowl lymphomatosis virus, fowl myeloblastosis virus. (05 Mar 2000) |
| sporadic bovine leukosis | A rare disease of cattle less than 3 years of age, of unknown cause, characterised by the development of lymphosarcoma; three clinicopathological forms are recognised: calf or juvenile form, thymic form, and cutaneous form. (05 Mar 2000) |
| enzootic bovine leukosis | A lymphoid neoplastic disease in cattle caused by the bovine leukaemia virus. Enzootic bovine leukosis may take the form of lymphosarcoma, malignant lymphoma, or leukaemia but the presence of malignant cells in the blood is not a consistent finding. (12 Dec 1998) |
| fowl leukosis | A group of transmissible, virus-induced diseases of chickens, characterised by proliferation of immature erythroid, myeloid, or lymphoid cells. It includes both leukaemic and solid-tumour forms. (12 Dec 1998) |
| avian encephalomyelitis virus | <virology> A virus of the genus Enterovirus (family Picornaviridae) causing avian infectious encephalomyelitis in young chicks. (05 Mar 2000) |
| avian erythroblastosis virus | <virology> Group of C type RNA tumour viruses (Oncovirinae) that cause various leukaemias and other tumours in birds. The acute leukaemia viruses, that are replication defective and require helper viruses, include avian erythroblastosis (AEV), myeloblastosis (AMV) and myelo cytomatosis viruses. AEV carries two transforming genes, v erbA and v erbB, the cellular homologue of the latter is the structural gene for the epidermal growth factor receptor. AMV carries v myb and causes a myeloid leukaemia, avian myelocytomatosis virus carries v myc. The avian lymphatic leukaemia viruses (ALV) are also Retroviridae but are replication competent and induce neoplasia only after several months, they often occur in conjunction with replication defective leukaemia viruses. (02 Jan 1998) |
| avian infectious laryngotracheitis virus | <virology> A herpesvirus causing avian infectious laryngotracheitis. (05 Mar 2000) |
| avian influenza virus | <virology> A type A influenza virus (genus Influenzavirus) that causes fowl plague. Synonym: fowl plague virus. (05 Mar 2000) |
| avian leukaemia virus | <virology> Group of C type RNA tumour viruses (Oncovirinae) that cause various leukaemias and other tumours in birds. The acute leukaemia viruses, that are replication defective and require helper viruses, include avian erythroblastosis (AEV), myeloblastosis (AMV) and myelo cytomatosis viruses. AEV carries two transforming genes, v erbA and v erbB, the cellular homologue of the latter is the structural gene for the epidermal growth factor receptor. AMV carries v myb and causes a myeloid leukaemia, avian myelocytomatosis virus carries v myc. The avian lymphatic leukaemia viruses (ALV) are also Retroviridae but are replication competent and induce neoplasia only after several months, they often occur in conjunction with replication defective leukaemia viruses. (02 Jan 1998) |
| avian lymphomatosis virus | avian leukosis-sarcoma complex |
| avian myeloblastosis virus | avian leukosis-sarcoma complex |