qalyub orthonairovirus qalyub orthonairovirus qalyub orthonairovirus, also known as qalyub nairovirus or simply qalyub virus, is a negative-sense single-stranded rna virus discovered in a rat's nest in a tomb wall in the egyptian town of qalyub (egyptian arabic: قليوب pronounced ) in 1952. the primary vector for transmission is the carios erraticus tick, and thus it is an arbovirus. qalyub orthonairovirus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: negarnaviricota class: ellioviricetes order: bunyavirales family: nairoviridae genus: orthonairovirus species: qalyub orthonairovirus member viruses bakel virus (bakv) bandia virus (bdav) chim virus (chimv) geran virus (gerv) omo virus (omov) qalyub virus (qybv) there is no evidence of clinical disease in humans.