While Lyme disease remains the most recognized threat, the local tick population in Strafford County increasingly carries a diverse range of pathogens. Furthermore, the arrival of new tick species has introduced non-infectious but life-altering allergic conditions.
Lyme Disease: Caused by the bacterium Borrelia burgdorferi. New Hampshire consistently reports among the highest per-capita rates of Lyme disease in the country, often centered in the southeastern counties.
Alpha-gal Syndrome (AGS): Unlike typical tick-borne illnesses, Alpha-gal is a serious, potentially life-threatening allergic condition.
The Cause: It is primarily associated with the bite of the Lone Star tick, which has been steadily migrating into New England. The tick’s saliva triggers an immune response to “alpha-gal,” a sugar molecule found in most mammals.
The Effect: Individuals may develop a severe allergy to “red meat” (beef, pork, lamb) and sometimes dairy or gelatin.
The Challenge: Symptoms are uniquely delayed, often appearing 3 to 8 hours after eating, making it difficult for residents to initially connect the reaction to a meal or a previous tick bite.
Historically, the Lone Star tick (Amblyomma americanum) was confined to the southern United States. However, two primary factors have brought this risk to Strafford County:
Milder Winters: Ticks that once died off during harsh New England winters are now surviving in the insulating leaf litter of our hardwood forests.
Host Migration: The movement of white-tailed deer and migratory birds has acted as a transit system, depositing Lone Star ticks into the Seacoast and inland corridors.
The emergence of Alpha-gal Syndrome is particularly impactful for the local population. With the county’s rich history of outdoor recreation from hiking the Blue Hills to gardening in Dover the risk of a “lifestyle-changing” bite is higher than in previous decades. Because AGS can cause anaphylaxis, its presence requires a shift in how residents perceive tick prevention: it is no longer just about avoiding a week of fever, but potentially avoiding a permanent change in dietary safety.
