Arboviral Surveillance

Eastern Equine Encephalitis (EEE) and West Nile Virus (WNV) are arboviral illnesses spread by the bite of an infected mosquito. Mosquito, animal, and human specimens are tested for the presence of EEE and WNV 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. Maine no longer routinely tests birds.

Arboviral Surveillance Archives

2022 Maine Arboviral Positive Results

Weekly Updates

• 2022
  • September 24, 2022 Word | PDF 
  • September 17, 2022 Word | PDF 
  • September 10, 2022 Word | PDF 
  • September 3, 2022 Word | PDF 
  • August 20, 2022 Word | PDF 
  • July 30, 2022 Word | PDF 

• 2021
  • November 13, 2021 Word | PDF 
  • October 23, 2021 Word | PDF 
  • October 9, 2021 Word | PDF 
  • September 25, 2021 Word | PDF 
  • September 18, 2021 Word | PDF 
  • August 28, 2021 Word | PDF 
  • August 14, 2021 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