title: Horizontal transmission studies on enzootic bovine leukosis.
abstract: Four groups of sero-negative cattle were brought into contact for various periods with either sero-positive and antigen-negative or sero- as well as antigen-positive animals. A seroconversion as evidence of transmission was only detected in animals that had been in contact with sero- and antigen-positive cattle. Shortest period of contact for those was 2 months after which a seroconversion was found. A distinct elevation of the number of lymphocytes was only detected in two animals which had been transported shortly after evidence of the seroconversion had occured.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis; D000956:Antigens, Viral / Q000032:analysis; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology / Q000635:transmission*; D007938:Leukemia / Q000276:immunology / Q000635:transmission / Q000662:veterinary*; D001909:Leukemia Virus, Bovine / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral