The Warren County Combined Health District reported three samples of the West Nile Virus were collected in Deerfield Township.
All three samples were from mosquitoes in the same location on Aug. 4, 2015.
The health district is treating standing water in public areas with an environmentally safe larvicide. Officials encourage residents to eliminate standing water on their property.
Symptoms for West Nile:
May develop two to 14 days after someone is bitten by an infected mosquito. Some 70-80 percent of people who are infected will not show any symptoms at all.
Up to 20 percent of the people who become infected will display minor symptoms which can include fever, headache, and body aches, nausea, vomiting, and sometimes swollen lymph glands or a skin rash on the chest, stomach and back.
Symptoms can last for as short as a few days, though even healthy people have been sick for several weeks.
Serious Symptoms in a Few People. Less than 1 percent of those infected will develop severe illness.
The severe symptoms can include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis. These symptoms may last several weeks, and neurological effects may be permanent.