[Prodomal stage of enzootic leukosis in cattle. Diagnostic study].
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis*; D007938:Leukemia / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D008218:Lymphocytosis / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary