Anoka And Carver Counties Alert: Mosquitoes Test Positive For West Nile Virus

Anoka And Carver Counties Alert: Mosquitoes Test Positive For West Nile Virus

Twin Cities, MN – July 4, 2025 – The Metropolitan Mosquito Control District (MMCD) has confirmed the presence of West Nile Virus (WNV) in mosquito samples collected in both Anoka and Carver Counties. This finding serves as an important reminder for residents to take proactive measures to protect themselves against mosquito bites.

While it is typical for West Nile Virus to be detected in mosquitoes during the summer months, these positive samples indicate that the virus is circulating in the local mosquito population. The MMCD, in close collaboration with the Minnesota Department of Health (MDH), is actively monitoring mosquito populations and implementing control measures to mitigate risk.

"The detection of West Nile Virus in mosquitoes in Anoka and Carver counties underscores the importance of personal protection," stated Dr. Alex Carlson, a spokesperson for the MMCD. "We encourage all residents to be vigilant and take simple, effective steps to reduce their exposure to mosquitoes."

Courtesy: CBS News

Understanding West Nile Virus

West Nile Virus is the most common mosquito-borne disease in Minnesota. It is primarily spread to humans through the bite of an infected mosquito, which acquires the virus by feeding on infected birds. Most people (about 80%) infected with WNV will not develop any symptoms. However, approximately 1 in 5 people may experience West Nile fever, characterized by symptoms such as:

• Fever
• Headache
• Body aches
• Joint pain
• Vomiting
• Diarrhea
• Rash

In rare cases (about 1 in 150 people), WNV can cause more severe neuroinvasive illness, affecting the brain and spinal cord. Symptoms of severe illness can include:

• High fever
• Severe headache
• Neck stiffness
• Disorientation
• Tremors
• Seizures
• Paralysis
• Coma

Individuals over 50 years of age and those with weakened immune systems are at a higher risk of developing severe illness. There is currently no specific antiviral treatment or vaccine available for West Nile Virus in humans. Treatment typically focuses on supportive care to manage symptoms.

Protecting Yourself and Your Family:

The most effective way to prevent West Nile Virus infection is to prevent mosquito bites. The MMCD and MDH recommend the following precautions:

• Use EPA-Registered Insect Repellent: Apply insect repellents containing DEET, picaridin, IR3535, or oil of lemon eucalyptus to exposed skin when outdoors. Always follow product label instructions.
• Wear Protective Clothing: When outdoors, especially during peak mosquito activity (dawn and dusk), wear long-sleeved shirts, long pants, and socks.
• Eliminate Standing Water: Mosquitoes lay their eggs in standing water. Regularly empty or remove water from common breeding sites around your home, including:
  • Tires
  • Cans
  • Flowerpots
  • Clogged gutters
  • Bird baths (change water weekly)
  • Pet dishes
  • Tarps and covers
• Repair Screens: Ensure windows and doors have intact screens to prevent mosquitoes from entering your home.
• Limit Outdoor Activity at Peak Times: Mosquitoes that carry West Nile Virus are most active at dawn and dusk. Consider limiting outdoor activities during these hours.

The MMCD will continue its surveillance and control efforts, including targeted treatments in areas where WNV activity is detected. Residents are encouraged to report mosquito concerns to the Metropolitan Mosquito Control District.

For more information about West Nile Virus and prevention, please visit the Minnesota Department of Health website at www.health.state.mn.us or the Metropolitan Mosquito Control District website at www.mmcd.org.

About the Metropolitan Mosquito Control District (MMCD):

The Metropolitan Mosquito Control District is a public health agency responsible for controlling mosquitoes and black flies in the seven-county Twin Cities metropolitan area. The MMCD employs integrated pest management strategies, including surveillance, public education, and environmentally sound control methods, to protect public health and enhance quality of life.

Inquiries on West Nile Virus can be directed to the Metropolitan Mosquito Control District via phone: (651) 645-9149, email: mmcdmosq@mmcd.org or one can visit their website to get more details.

About the Minnesota Department of Health (MDH):

The Minnesota Department of Health works to protect, maintain, and improve the health of all Minnesotans. The MDH monitors and responds to public health threats, including mosquito-borne diseases like West Nile Virus, and provides guidance to the public on prevention and safety.

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