First mosquito-borne virus of 2022 detected in mosquitoes in Michigan
LANSING, Mich. (WNDU) - The first mosquito-borne virus of 2022 has been detected in mosquitoes in Michigan.
According to the Michigan Department of Health and Human Services (MDHHS), mosquitoes recently collected in Bay County have tested positive for Jamestown Canyon virus (JCV) at their Bureau of Laboratories.
Michiganders are reminded that the best way to protect themselves against JCV and other mosquito-borne illnesses, including Eastern Equine Encephalitis (EEE) and West Nile virus (WNV), is to prevent mosquito bites.
The following steps are recommended by MDHHS 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.
More information from MDHHS:
Every summer in Michigan, bites from mosquitoes carry the risk of spreading diseases to people and animals. JCV sickened six Michiganders in 2021. Also reported last year were 46 cases of WNV and one case of EEE. Seven of the WNV cases resulted in death.
The JCV virus is spread to people through bites from infected mosquitoes. Most cases occur from late spring through mid-fall. Illness can develop within a few days to two weeks following a bite from an infected mosquito. 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 Michiganders 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.”
While the JCV is found throughout much of the U.S., 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.
For more information, visit Michigan.gov/EmergingDiseases.
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