There's still a lot to learn about the alpha-gal allergy.
There's still a lot to learn about the alpha-gal allergy. Alpha gal is a sugar that animals — including cows, pigs and lamb — make in their bodies. 'As humans, we don't make this alpha gal sugar,' Commins explains. 'We all make an immune response to it.' So, how does a tick bite cause the allergy? It's possible that ticks inject humans with alpha gal when they bite. The ticks likely get it from feeding off wild animals, such as mice or squirrels, that also carry alpha gal. Or it's possible that ticks activate the response in another way."