Mosquitoes test positive for Cache Valley Virus in 2 Nebraska health districts

Two health departments in southern Nebraska reported Friday several groups of mosquitoes were found carrying the Cache Valley Virus, or CVV.

The Lincoln-Lancaster County Health Department and the South Heartland District Health Department, which encompasses Adams, Clay, Webster and Nuckolls counties in south-central Nebraska, said their offices detected the virus in separate batches of mosquitoes.

According to the Lincoln-Lancaster County Health Department, the virus is a mosquito-borne disease that can be detected in the United States. The disease can cause serious infections such as encephalitis and meningitis, long-term health effects or death. But human cases of CVV are rare, according to the U.S. Centers for Disease Control and Prevention. Fewer than 10 cases have been reported in the U.S. since May.

There are no medications or vaccines to treat CVV. Preliminary symptoms can include fatigue, vomiting, nausea, headaches, fever and sometimes rash. Severe symptoms can include confusion, loss of coordination, seizures, difficulty speaking and stiff neck.

Even though mosquito groups tested positive for the virus, both health departments said they haven’t received any reports of human CVV cases. Health officials are warning people to take precautions when outside, such as using EPA-registered insect repellent, limiting time spent outside early in the morning or late in the evening, and wearing clothing that covers skin.

People can also take precautions by draining any standing water near their homes that can serve as breeding grounds for mosquitos, such as bird baths, swimming pools and pet bowls. Mosquitos can also seek refuge in tires and flower pots.

The South Heartland District Health Department said the City of Hastings, which is included in its health district, began fogging insecticides aimed at adult mosquitoes near parks, around schools and roadways. The city is also treating its ponds and lakes with larvicide.