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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
2024 Maine Arboviral Positive Results
| Surveillance | Species | Collection Date | Town | County | Agent |
|---|---|---|---|---|---|
| Mosquito | Aedes communis/sticticus | May 30, 2024 | Orono | Penobscot | JCV |
| Mosquito | Aedes communis/sticticus | June 13, 2024 | Orono | Penobscot | JCV |
| Mosquito | Aedes abserratus/punctor | May 23, 2024 | Alfred | York | JCV |
| Mosquito | Aedes communis/sticticus | June 18, 2024 | Orono | Penobscot | JCV |
| Veterinary | American Crow | June 27, 2024 | York | WNV | |
| Veterinary | American Crow | July 2, 2024 | Kennebec | WNV | |
| Veterinary | American Crow | July 3, 2024 | Oxford | WNV | |
| Veterinary | Cooper's Hawk | July 8, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | July 14, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | July 18, 2024 | Cumberland | WNV | |
| Human | July 19, 2024 | Waldo | WNV | ||
| Veterinary | Cooper's Hawk | July 28, 2024 | Lincoln | WNV | |
| Veterinary | American Crow | July 30, 2024 | Somerset | WNV | |
| Veterinary | American Crow | August 1, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | August 1, 2024 | Hancock | WNV | |
| Veterinary | American Crow | August 1, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | August 4, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | August 5, 2024 | Knox | WNV | |
| Veterinary | American Crow | August 5, 2024 | Cumberland | WNV | |
| Veterinary | Wild Turkey | August 6, 2024 | Waldo | EEE | |
| Veterinary | American Crow | August 8, 2024 | Cumberland | WNV | |
| Veterinary | Emu | August 19, 2024 | Penobscot | EEE | |
| Veterinary | Emu | August 19, 2024 | Penobscot | EEE | |
| Veterinary | Horse | August 29, 2024 | Somerset | EEE | |
| Veterinary | Horse | September 3, 2024 | Penobscot | EEE | |
| Human | August 28, 2024 | Cumberland | WNV | ||
| Veterinary | Horse | September 8, 2024 | Penobscot | EEE | |
| Veterinary | Llama | September 8, 2024 | Penobscot | EEE | |
| Veterinary | Horse | September 10, 2024 | Waldo | EEE | |
| Veterinary | American Crow | August 10, 2024 | Kennebec | WNV | |
| Veterinary | American Crow | August 13, 2024 | Sagadahoc | WNV | |
| Veterinary | Bald Eagle | August 15, 2024 | Washington | WNV | |
| Veterinary | American Crow | August 19, 2024 | York | WNV | |
| Veterinary | American Crow | August 24, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | August 28, 2024 | Knox | WNV | |
| Veterinary | American Crow | August 29, 2024 | Washington | WNV | |
| Veterinary | American Crow | August 30, 2024 | Cumberland | WNV | |
| Veterinary | Northern Cardinal | August 30, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | August 31, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | September 1, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | September 1, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | September 1, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | September 2, 2024 | Cumberland | WNV | |
| Veterinary | Broad-winged Hawk | September 3, 2024 | Piscataquis | WNV | |
| Veterinary | American Crow | September 4, 2024 | Penobscot | WNV | |
| Veterinary | American Crow | September 4, 2024 | Penobscot | WNV | |
| Veterinary | Cooper's Hawk | September 4, 2024 | Somerset | EEE | |
| Veterinary | Blue Jay | September 4, 2024 | Somerset | WNV | |
| Veterinary | American Crow | September 8, 2024 | Penobscot | EEE | |
| Mosquito | Culiseta melanura | August 27, 2024 | Bradford | Penobscot | EEE |
| Mosquito | Culiseta melanura | September 11, 2024 | Palermo | Waldo | WNV |
| Veterinary | Alpaca | September 1, 2024 | Lincoln | WNV | |
| Veterinary | Horse | September 16, 2024 | Somerset | EEE | |
| Veterinary | Horse | September 18, 2024 | Lincoln | EEE | |
| Veterinary | Horse | September 19, 2024 | Somerset | EEE | |
| Veterinary | Horse | September 19, 2024 | Somerset | WNV | |
| Veterinary | Horse | September 21, 2024 | Kennebec | EEE | |
| Veterinary | Horse | September 23, 2024 | Waldo | EEE | |
| Veterinary | Horse | September 25, 2024 | Somerset | EEE | |
| Veterinary | Horse | September 27, 2024 | Somerset | EEE | |
| Veterinary | Horse | September 28, 2024 | Penobscot | EEE | |
| Veterinary | Horse | October 7, 2024 | Somerset | EEE | |
| Veterinary | Horse | October 3, 2024 | Penobscot | EEE | |
| Veterinary | Horse | October 20, 2024 | Lincoln | EEE | |
| Human | October 30, 2024 | Penobscot | EEE | ||
| Veterinary | American Crow | September 9, 2024 | Cumberland | WNV | |
| Veterinary | American Crow | September 12, 2024 | Penobscot | WNV | |
| Veterinary | Wild Turkey | September 17, 2024 | Penobscot | EEE | |
| Veterinary | American Crow | September 21, 2024 | Penobscot | EEE | |
| Veterinary | Barred Owl | September 23, 2024 | Kennebec | EEE | |
| Veterinary | American Goldfinch | September 24, 2024 | Cumberland | EEE | |
| Veterinary | American Crow | September 25, 2024 | Knox | WNV | |
| Veterinary | American Crow | September 27, 2024 | Penobscot | WNV | |
| Veterinary | Merlin | September 28, 2024 | York | WNV | |
| Veterinary | American Crow | October 1, 2024 | Cumberland | WNV | |
| Veterinary | Cooper's Hawk | October 4, 2024 | Cumberland | WNV | |
| Veterinary | Wild Turkey | October 9, 2024 | Hancock | EEE | |
| Veterinary | Blue Jay | October 10, 2024 | Penobscot | WNV | |
| Veterinary | Barred Owl | October 12, 2024 | York | EEE |
Weekly Updates
- 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
- 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
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
