LANSING — Mosquitoes recently collected in Bay County have tested positive for Jamestown Canyon virus at the Michigan Department of Health and Human Services Bureau of Laboratories.

A Thursday release from the Michigan Department of Health and Human Services said these are the first infected mosquito pools detected in 2022. Residents are reminded that the best way to protect themselves against JCV and other mosquito-borne illnesses, including Eastern Equine Encephalitis and West Nile virus, is to prevent mosquito bites.

Every summer in Michigan, bites from mosquitoes carry the risk of spreading diseases to people and animals, the release said. JCV sickened six Michigan residents in 2021. Also reported last year were 46 cases of WNV and one case of EEE. Seven of the WNV cases resulted in death.

While the virus is found throughout much of the United States, says the Centers for Disease Control and Prevention, most cases are reported from the upper Midwest. Cases occur from late spring through mid-fall. Fever, headache, and fatigue are common symptoms with JCV virus disease.

“Jamestown Canyon virus can cause severe disease,” the CDC cautions, “including encephalitis (inflammation of the brain). There are no vaccines to prevent or medicines to treat Jamestown Canyon virus infection. Reduce your risk of infection by preventing mosquito bites.”

Illness can develop within a few days to two weeks following a bite from an infected mosquito, MDHHS said. While most people do not become ill, initial symptoms can include fever, headache and fatigue. In rare cases, it can cause severe disease in the brain and/or spinal cord, including encephalitis and meningitis.

“It only takes one bite from an infected mosquito to cause a severe illness,” said Dr. Natasha Bagdasarian, MDHHS chief medical executive. “We urge (Michigan residents) to take precautions such as using an EPA-registered insect repellent when outdoors, avoiding areas where mosquitoes are present if possible, and wearing clothing to cover arms and legs to prevent bites.”

Cases have been increasing in the Midwest. This likely reflects increased awareness and testing, but may also be due to an increase in the presence of the virus in the environment.

This is the second year that the MDHHS BOL is offering virus testing of mosquito pools collected by local health departments and county mosquito control programs.

Testing is offered to improve detection and notification of mosquito-borne viruses.

JCV can be spread by mosquitoes that become infected when they feed on deer or other animals that have the virus in their blood. Infected mosquitoes spread the virus to other animals or people through bites. Arboviruses including WNV and EEE spread when mosquitoes contract the virus from biting infected birds, then biting a human.

Residents can stay healthy by using simple, effective strategies to protect themselves and their families.

The following steps are recommended to avoid mosquito-borne diseases:

• Apply insect repellents that contain the active ingredient DEET, or other EPA-approved products, to exposed skin or clothing. Always follow the manufacturer’s directions for use.

• Wear light-colored, long-sleeved shirts and long pants when outdoors. Apply insect repellent to clothing to help prevent bites.

• Maintain window and door screening to help keep mosquitoes outside.

• Empty water from mosquito breeding sites around the home, such as buckets, unused kiddie pools, old tires or similar sites where mosquitoes lay eggs.