kasokero orthonairovirus kasokero orthonairovirus kasokero orthonairovirus is a species of virus in the genus orthonairovirus. its only known host is the fruit bat rousettus aegyptiacus. the virus takes its name from the kasokero cave in uganda, where it was first collected. kasokero orthonairovirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: negarnaviricota class: ellioviricetes order: bunyavirales family: nairoviridae genus: orthonairovirus species: kasokero orthonairovirus