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Mosquitoes and Ticks
MOSQUITOES
ALERT: Carlisle Elevated to High Risk for West Nile Virus
The MA Department of Public Health announced on August 12, 2025, that Carlisle has been elevated to high risk for West Nile Virus (WNV) transmission. Residents are advised to take precautions to avoid mosquito bites, such as using insect repellent, wearing protective clothing, eliminating standing water where mosquitoes breed, and being aware of peak mosquito hours from dusk to dawn.
Mosquito-borne Illnesses
West Nile Virus (WNV)
Eastern Equine Encephalitis (EEE)
Prevention
6 Ways to Protect Yourself from Mosquitoes
State Monitoring
MA Arbovirus Update
Includes state-wide Risk Level Maps for West Nile Virus (WNV) and Eastern Equine Encephalitis (EEE)
MA Arbovirus Surveillance Program Weekly Reports
September 28 - October 4, 2025
October 5 - 11, 2025 (FINAL MDPH REPORT )
TICKS
Tick Testing Program
Carlisle residents can request testing for the detection of seven different pathogens in Deer (Blacklegged) ticks through a program established by Great Meadows Public Health Collaborative (GMPHC) and funded through a state grant. Residents can order the test for $20 rather than $50 without the state subsidy.
For more information on getting a tick tested, see the GMPHC Tick Testing Program Flyer.
Tick-borne Illness and Protection
Everything You Need to Know About Ticks
A brochure including information on tick identification, checking for ticks, tick-borne illness, how to avoid direct contact with ticks, prevention methods, and tick repellents.