West Nile virus was found in a human

The first human case of West Nile virus in a Wisconsin resident, this year, has been confirmed The individual is a resident of Dane County.

Cases of West Nile virus have also been reported in three horses in Wisconsin, and several mosquito pools. The horse cases were located in Dunn and Clark counties, and the positive mosquitoes were from Milwaukee and Lafayette counties.

“This confirmed case in a Wisconsin resident, is a reminder that even as summer winds down, we still need to take precautions to prevent mosquito bites,” said State Health Officer Paula Tran.

Since West Nile virus was first detected in Wisconsin, in 2002, infections in humans have been reported from June through October. An average of 17 cases of West Nile virus are reported among Wisconsin residents, each year.

The risk of West Nile virus infection continues until the first hard frost.

West Nile virus is spread to humans, horses, birds and other animals, through the bite of an infected mosquito. Mosquitoes acquire West Nile virus by feeding on infected birds. The virus is not spread directly from person to person, animal to animal, or animal to person.

Most people (80 percent) who are infected with West Nile virus, do not get sick. Those who do become ill usually experience mild symptoms, such as fever, headache, muscle ache, rash and fatigue. However, some people who become infected with the virus, get seriously ill with symptoms that include high fever, muscle weakness, stiff neck, disorientation, mental confusion, tremors, confusion, paralysis and coma.

Older adults and those with compromised immune systems, are at greater risk of developing severe illness that can be fatal. It is important that people contact a healthcare provider if they suspect they have West Nile virus illness.

The best way to avoid illnesses spread by mosquitoes, is to reduce exposure to mosquitoes and eliminate mosquito breeding sites. Apply an insect repellent with DEET, picaridin, oil of lemon eucalyptus, or IR3535 to exposed skin and clothing. Prior to heading outdoors, treat clothing with permethrin; do not apply permethrin directly to skin.

Consider rescheduling outdoor activities that occur during evening or early morning hours, when mosquitoes that spread West Nile virus are most active. Wear long-sleeves, long pants and socks when outdoors, to help keep mosquitoes away from skin.

Make sure window and door screens are intact and tightly fitted to prevent mosquitoes from getting into the home. Prevent mosquitoes from breeding by removing stagnant water from items around property, such as tin cans, plastic containers, flower pots, discarded tires, roof gutters and downspouts. Turn over wheelbarrows, kiddie pools, buckets and small boats, such as canoes and kayaks, when not in use.

Change the water in bird baths and pet dishes at least every three days. Clean and chlorinate swimming pools, outdoor saunas and hot tubs; drain water from pool covers. Trim or mow tall grass, weeds and vines, since mosquitoes use these areas to rest during hot daylight hours.