Arboviral Surveillance

Eastern Equine Encephalitis (EEE), Jamestown Canyon Virus (JCV), and West Nile Virus (WNV) are arboviral illnesses spread by the bite of an infected mosquito. Mosquito, animal, and human specimens are tested for these viruses at Maine's Health and Environmental Testing Laboratory (HETL). Animal specimens may also be tested through the National Veterinary Services Laboratory (NVSL). The state of Maine organizes routine mosquito trapping at selected sites, and routinely tests those mosquitoes for disease. The mosquito trapping season runs from July to September.

Arboviral Surveillance Archives

2025 Maine Arboviral Positive Results

Weekly Updates

• 2025
  • July 5, 2025 Word | PDF 
  • June 28, 2025 Word | PDF 
  • June 21, 2025 Word | PDF 
  • June 14, 2025 Word | PDF 

• 2024
  • November 16, 2024 Word | PDF 
  • November 9, 2024 Word | PDF 
  • November 2, 2024 Word | PDF 
  • October 26, 2024 Word | PDF 
  • October 19, 2024 Word | PDF 
  • October 12, 2024 Word | PDF 
  • October 5, 2024 Word | PDF 
  • September 28, 2024 Word | PDF 
  • September 21, 2024 Word | PDF 
  • September 14, 2024 Word | PDF 
  • September 7, 2024 Word | PDF 
  • August 31, 2024 Word | PDF 
  • August 24, 2024 Word | PDF 
  • August 17, 2024 Word | PDF 
  • August 10, 2024 Word | PDF 
  • August 3, 2024 Word | PDF 
  • July 27, 2024 Word | PDF 
  • July 20, 2024 Word | PDF 
  • July 13, 2024 Word | PDF 
  • July 6, 2024 Word | PDF 
  • June 29, 2024 Word | PDF 
  • June 22, 2024 Word | PDF 
  • June 15, 2024 Word | PDF 

Resources

• Mosquito Q & A – frequently asked questions with peer-reviewed citations
• Massachusetts Arbovirus Information
• New Hampshire Arboviral Test Results
• Vermont Arboviral Surveillance
• National Arbonet Maps (provided by USGS)
• Federal CDC Site