Final answer:
Most cases of encephalitis are transmitted by mosquitoes, specifically arthropod-borne viruses known as arboviruses.
Step-by-step explanation:
Most cases of encephalitis are transmitted by mosquitoes. Encephalitis can be caused by several arthropod-borne viruses, known as arboviruses, and most of them are transmitted by mosquitoes. For example, West Nile encephalitis, eastern equine encephalitis, and St. Louis encephalitis are all arboviral encephalitis diseases transmitted primarily by mosquitoes. Japanese encephalitis is another type of encephalitis caused by a virus transmitted by Culex mosquitoes. Tick bites and other factors can also lead to encephalitis, but mosquitoes are the main transmitters.