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Information for
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 the presence of EEE and WNV at Maine's Health and Environmental Testing Laboratory (HETL). U.S. CDC's also tests mosquitoes for the presence of JCV. 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
2023 Maine Arboviral Positive Results
| Surveillance | Species | Collection Date | Town | County | Agent |
|---|---|---|---|---|---|
| Mosquito | Aedes cantator | July 11, 2023 | Wells | York | JCV |
| Mosquito | Aedes cantator | July 11, 2023 | Wells | York | JCV |
| Mosquito | Aedes cantator | July 11, 2023 | Wells | York | JCV |
| Mosquito | Culiseta melanura | September 7, 2023 | Lebanon | York | EEE |
| Veterinary | Emu | September 13, 2023 | Piscataquis | EEE | |
| Veterinary | Emu | September 13, 2023 | Piscataquis | EEE | |
| Veterinary | Emu | September 13, 2023 | Piscataquis | EEE | |
| Veterinary | Emu | September 13, 2023 | Piscataquis | EEE | |
| Veterinary | Horse | September 18, 2023 | Piscataquis | EEE | |
| Mosquito | Culiseta morsitans | September 21, 2023 | Greenbush | Penobscot | WNV |
| Mosquito | Culiseta morsitans | September 21, 2023 | Greenbush | Penobscot | EEE |
| Mosquito | Culiseta melanura | September 22, 2023 | Bangor | Penobscot | EEE |
| Veterinary | Horse | September 25, 2023 | Penobscot | EEE | |
| Mosquito | Culiseta melanura | October 5, 2023 | Benton | Kennebec | EEE |
| Veterinary | Horse | October 6, 2023 | York | WNV | |
| Mosquito | Culiseta melanura | October 3, 2023 | Berwick | York | EEE |
| Veterinary | Horse | October 7, 2023 | Waldo | EEE | |
| Veterinary | Emu | October 11, 2023 | Penobscot | EEE | |
| Veterinary | Emu | October 11, 2023 | Penobscot | EEE | |
| Veterinary | Emu | October 11, 2023 | Penobscot | EEE | |
| Veterinary | Emu | October 11, 2023 | Penobscot | EEE | |
| Veterinary | Horse | October 16, 2023 | Cumberland | EEE | |
| Veterinary | Emu | October 16, 2023 | Somerset | EEE | |
| Veterinary | Emu | October 16, 2023 | Somerset | EEE | |
| Veterinary | Emu | October 16, 2023 | Somerset | EEE | |
| Veterinary | Emu | October 16, 2023 | Somerset | EEE | |
| Veterinary | Common Raven | October 3, 2023 | Hancock | EEE | |
| Veterinary | Red-tailed Hawk | October 17, 2023 | Oxford | WNV | |
| Veterinary | American Crow | November 5, 2023 | Penobscot | WNV |
Weekly Updates
- 2023
- November 11, 2023 Word | PDF
- November 4, 2023 Word | PDF
- October 28, 2023 Word | PDF
- October 21, 2023 Word | PDF
- October 14, 2023 Word | PDF
- October 7, 2023 Word | PDF
- September 30, 2023 Word | PDF
- September 23, 2023 Word | PDF
- September 16, 2023 Word | PDF
- September 9, 2023 Word | PDF
- September 2, 2023 Word | PDF
- August 26, 2023 Word | PDF
- August 19, 2023 Word | PDF
- August 12, 2023 Word | PDF
- August 5, 2023 Word | PDF
- July 29, 2023 Word | PDF
- 2022
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
