farming systems

Bovine leukosis infection (EBL) is a worldwide occurring disease of cattle caused by the bovine leukemia virus and is clinically characterised by the occurrence of multiple lympho-sarcomas in about 10% of the infected cattle. In Africa, the prevalence of Bovine leukosis infection has been reported in Namibia, Egypt, South Africa, Uganda and Tanzania. In Kenya, cases of bovine lympho-sarcomas have been reported but the incidence, prevalence and distribution of the disease in the country remain unknown.