Alpha-gal syndrome is a serious, potentially life-threatening allergic condition. Unlike most food allergies, which are often genetic or appear in childhood, AGS is an acquired allergy triggered by the bite of certain tick species, most notably the Lone Star tick (Amblyomma americanum).
When a Lone Star tick feeds on a mammal (such as a deer), it ingests a sugar molecule called galactose-alpha-1,3-galactose, or “alpha-gal.” If that tick subsequently bites a human, it can transfer these molecules into the person’s bloodstream. In some individuals, the immune system identifies alpha-gal as a foreign threat and produces specific IgE antibodies.
Southern New Jersey, encompassing counties such as Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester, and Salem, has become a primary zone for AGS risk.
The Rise of the Lone Star Tick: Historically a southern species, the Lone Star tick has successfully migrated and established dominant populations in Southern NJ. In some local surveys, Lone Star ticks now outnumber the Black-legged (Deer) tick.
High Deer Density: The abundance of white-tailed deer in the Pine Barrens and suburban Jersey woodlots provides the necessary host environment for Lone Star ticks to thrive and spread alpha-gal molecules.
Suburban Encroachment: Much of Southern NJ consists of “edge habitats”—where residential backyards meet wooded areas. This increases the frequency of human-tick interactions during routine activities like gardening, hiking, or playing outdoors.
Warmer Winters: Historically, cold NJ winters would suppress tick activity. Now, if temperatures rise above freezing (32°F / 0°C) for even a few days in January or February, Lone Star ticks can become active and seek a host.
Spring/Summer Peak: In Southern NJ, the highest risk for Lone Star nymph and adult bites occurs from April through September. Nymphs are particularly dangerous because they are the size of a poppy seed and often go unnoticed.
Humidity Factors: Lone Star ticks are highly susceptible to desiccation (drying out). The high humidity levels characteristic of the Jersey Shore and the Pine Barrens during summer provide the ideal environment for their survival.
