Delaware officials urge caution as peak tick season begins

It’s officially tick season, so be precautious to avoid getting latched on to and suffering from tick-related illnesses. (Photo by DieterMeyrl/Getty Images)

As summer temperatures rise and more Delawareans head outdoors, state health and environmental officials are warning of increased risks from ticks and tick-borne illnesses.

The Delaware Division of Public Health (DPH) and the Department of Natural Resources and Environmental Control (DNREC) are urging residents to take precautions to avoid tick bites, which can transmit serious diseases including Lyme disease, ehrlichiosis, and the increasingly reported Alpha-gal Syndrome (AGS).

According to DPH’s 2024 Vector-Borne Disease Surveillance Report, there were 344 reported cases of Lyme disease in Delaware last year.

The disease, which is transmitted by blacklegged ticks (also known as deer ticks), can cause symptoms ranging from fatigue and fever to joint pain and neurological complications if left untreated.

A telltale bullseye-shaped rash may appear at the site of the bite in some cases.

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State health officials also noted a rise in AGS cases, a tick-related condition that can cause an allergic reaction to red meat.

The illness, linked primarily to the lone star tick, became a reportable condition in Delaware in December 2024 after more than 100 cases were documented in the latter half of the year.

“Defending yourself from ticks is not just about comfort, it’s about health,” said DPH Director Steven Blessing. “By following these simple, effective steps, you can protect yourself and your loved ones from tick bites and tick-borne illnesses, ensuring a safe and enjoyable summer.”

DNREC Tick Biologist Dr. Ashley Kennedy emphasized the growing diversity of tick species in the state.

Delaware is now home to at least 15 different tick species, possibly as many as 19, she pointed out.

The most common tick in Delaware is the lone star tick, which does not carry Lyme disease but can transmit ehrlichiosis and is strongly associated with AGS.

The American dog tick, another prevalent species, can spread spotted fever rickettsiosis.

Defending against ticks

Officials recommend preventive measures:

Dress smart: Wear long sleeves and pants, and tuck pants into socks when walking in wooded or grassy areas. Light-colored clothing helps spot ticks more easily.
Avoid tick habitats: Stick to the center of trails and steer clear of tall grass, leaf litter, and dense brush.
Use repellents: Apply EPA-approved insect repellents containing at least 20% DEET, picaridin, or oil of lemon eucalyptus.
Conduct tick checks: After spending time outdoors, check yourself, children, and pets thoroughly. Pay close attention to warm, hidden areas like armpits and behind the knees.
Practice yard care: Keep grass trimmed, clear leaf litter, and use gravel or wood chips to separate play areas from wooded zones.

If a tick is found, experts advise removing it promptly with fine-tipped tweezers and cleaning the bite area. Anyone who develops a rash, fever, or flu-like symptoms within 30 days of a tick bite should consult a healthcare provider.

Delawareans are also encouraged to report tick encounters to DNREC and consider saving the tick for identification, which can aid in diagnosis if symptoms develop.