Michigan residents are being urged to take precautions against mosquito bites as mosquitoes collected in Saginaw County on Wednesday, May 22, have tested positive for Jamestown Canyon virus (JCV) at the Michigan Department of Health and Human Services. 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… Empty water from mosquito breeding sites around the home, such as buckets, unused kiddie pools, old tires and other water-holding containers where mosquitoes can lay eggs.