Between 70 percent and 80 percent of people that become infected with West Nile Virus do not develop any symptoms.
The Indiana State Department of Health says that the human case was confirmed Monday in Vanderburgh County and 168 mosquito samples in 27 Indiana counties have tested positive for the virus. In North America, that means that mosquito season - extending from the late spring through the fall - is West Nile season.
The mosquitos get the virus by feeding on infected birds.
Dusk and dawn are when mosquitoes are most active.
Cover up with light-colored clothes, long sleeves and trousers when outdoors or while in areas where mosquito activity is high. At least once a week, eliminate the sources of standing water around a home by draining garbage cans, buckets, toys, flowerpots, etc.
Clean your gutters and flush birdbaths or fountains once a week.
"Over the past few weeks, West Nile virus activity has been on the rise across Ontario, so it's not surprising to see positive mosquito pools in Perth County", says Dale Lyttle, Senior Public Health Inspector.
Use insect repellent when outdoors; a repellent with DEET or Icaridin offers the most effective protection. Only about 20 percent of those who come in contact with West Nile virus exhibit any symptoms, according to the Centers for Disease Control and Prevention. Officials first began seeing a significant increase in early July and the trend has continued as the humid months wear on. By the end of mosquito season in October, 26 Dallas County residents had reported infections, leading to two deaths.