Public health officials in southern Maine are warning residents that tick season has arrived earlier than usual this year, with the first confirmed cases of Lyme disease reported in March — several weeks ahead of the typical timeline — as warming temperatures extend the window of tick activity.
The Maine Center for Disease Control and Prevention reported 15 confirmed or probable cases of Lyme disease in Cumberland and York counties during March, compared to just three cases during the same period last year. Officials attribute the early activity to an unusually mild late winter that allowed deer ticks to become active sooner.
“We’re seeing ticks in places and at times of year that used to be considered safe,” said state epidemiologist Dr. Nirav Shah. “The message for Mainers is simple: tick prevention is now a year-round concern, not just a summer thing.”
Maine consistently ranks among the top five states in the nation for Lyme disease incidence, with more than 2,500 confirmed cases annually. The disease, transmitted by the bite of an infected deer tick, can cause joint pain, neurological problems, and chronic fatigue if not treated promptly with antibiotics.
The expanding tick population is linked to several factors, including climate change, increasing deer populations, and habitat fragmentation. Researchers at the University of Maine have documented a northward expansion of deer tick populations over the past two decades, with ticks now well established in areas of the state where they were rarely found a generation ago.
“The tick population is growing and spreading, and that trend is going to continue,” said UMaine entomologist Dr. Allison Gardner. “We need to think of this as a permanent change, not a temporary blip.”
Health officials recommend several preventive measures: using EPA-registered insect repellents containing DEET or picaridin, treating clothing and gear with permethrin, performing daily tick checks after spending time outdoors, and showering within two hours of coming inside. Removing a tick within 24 hours significantly reduces the risk of Lyme disease transmission.
The state is also investing in public education, with a new awareness campaign launching in April that targets outdoor recreationists, landscaping and construction workers, and families with children who play outside.
