Mosquito-borne diseases or mosquito-borne illnesses are diseases caused by bacteria, viruses or parasites transmitted by mosquitoes. Nearly 700 million people contract mosquito-borne illnesses each year, resulting in more than a million deaths.[1]
Diseases transmitted by mosquitoes include malaria, dengue, West Nile virus, chikungunya, yellow fever,[2] filariasis, tularemia, dirofilariasis, Japanese encephalitis, Saint Louis encephalitis, Western equine encephalitis, Eastern equine encephalitis,[3] Venezuelan equine encephalitis, Ross River fever, Barmah Forest fever, La Crosse encephalitis, and Zika fever,[3] as well as newly detected Keystone virus and Rift Valley fever. A preprint by Australian research group argues that Mycobacterium ulcerans, the causative pathogen of Buruli ulcer is also transmitted by mosquitoes.[4]
There is no evidence as of April 2020 that COVID-19 can be transmitted by mosquitoes, and it is extremely unlikely this could occur.[5][6]