lagos bat lyssavirus lagos bat lyssavirus lagos bat lyssavirus, formerly lagos bat virus (lbv) is a lyssavirus of southern and central africa that causes a rabies-like illness in mammals. it was first isolated from a fruit bat (eidolon helvum) from lagos island, nigeria in 1956. brain samples from the bat showed poor cross-reactivity to rabies antibodies but the virus was found to be closely related to the rabies virus. this was the first discovery of a rabies-related virus. until this time, rabies was thought to have a single causal agent. lagos bat lyssavirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: negarnaviricota class: monjiviricetes order: mononegavirales family: rhabdoviridae genus: lyssavirus species: lagos bat lyssavirus lagos bat lyssavirus has been isolated from wild and domestic mammals in southern africa including bats, cats and one dog. one isolate was detected in france in 1999 when a fruit bat (rousettus egypticus), which had been displaying signs of aggression, died. the bat had been imported from africa. no human cases of lagos bat lyssavirus infection have been documented.