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Media have reported a second case of La Crosse encephalitis in central Ohio on 24 July 2017. Local health officials are implementing mosquito control measures and providing informationt to the public.
La Crosse encephalitis virus (LACV) is transmitted to humans through the bite of an infected mosquito. Most cases occur in the mid-west, mid-Atlantic and southeastern USA.Symptoms include fatigue, fever, headache, nausea and vomiting. Encephalitis can occur in serious cases, most commonly in children. Death can occur, although this is rare.
There is no specific treatment for La Crosse encephalitis virus infection and no vaccine is available. Prevention is by avoiding mosquito bites.
Avoidance of mosquito bites should always be considered as the first line of defence against mosquito-borne infection, especially malaria, dengue fever, chikungunya, zika and yellow fever.
Different species of mosquito bite at different times of day, and transmit different infection so prevention measures are advisable at all times.
Examples:
For further advice see Mosquito Bite Avoidance.