Abstract

Bovine leukemia virus (BLV) and human T-lymphotropic virus type 1 (HTLV-1) are closely related deltaretroviruses that induce hematological diseases. HTLV-1 infects about 15 millions people worldwide, mainly in subtropical areas. HTLV-1 induces a wide spectrum of diseases (e.g. HTLV-associated myelopathy / tropical spastic paraparesis) and leukemia/lymphoma (Adult T cell Leukemia). Bovine leukemia virus is a major pathogen of cattle causing important economic losses due to reduction in production, export limitations and lymphoma-associated death. In the absence of satisfactory treatment for these diseases and besides prevention of transmission, the best option to reduce prevalence of deltaretroviruses is vaccination. We propose a strategy that efficiently protects against BLV infection in herd settings and outline key parameters required for vaccine efficacy.

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