Over the last decade, the number of West Nile virus cases have ranged from a low of zero to a high of 441. Each year, the state continues to test around a quarter million mosquitoes to monitor the situation.
COLUMBUS, Ohio - A 25-year-old Columbus woman is the 16th diagnosed case of the West Nile virus in Ohio this summer.
The Columbus Dispatch reports that the woman was hospitalized, but now she's been released and is recovering.
The U.S. Centers for Disease Control and Prevention say one in five people who become infected with mosquito-carrying West Nile virus will develop West Nile fever. Symptoms include fever, headache, tiredness and body aches, occasionally with a skin rash and swollen lymph glands.
The illness can last from a few days to several weeks.
In severe cases, people can develop encephalitis or meningitis. People over 50 and those with compromised immune systems are at highest risk.
So far, Texas has been hit hardest in the U.S., reporting 20 deaths and more than 400 illnesses.
West Nile virus stories
U.S. health officials say last year was the worst ever for West Nile virus deaths.