We like to
believe that there’s no such thing as a bad organism, that every creature must
have its place in the world. But ticks are really making that difficult. As if
Lyme disease wasn't bad enough, scientists say some ticks carry a pathogen that
causes a sudden and dangerous allergy to meat. Yes, meat.
The Lone
Star tick (Amblyomma americanum) mostly looks like your average tick, with a
tiny head and a big fat behind, except the adult female has a Texas-shaped spot
on its back—thus the name. Unlike other American ticks, the Lone Star feeds on
humans at every stage of its life cycle. Even the larvae want our blood. You
can’t get Lyme disease from the Lone Star tick, but you can get something even
more mysterious: the inability to safely consume a bacon cheeseburger.
"The
weird thing about [this reaction] is it can occur within three to 10 or 12
hours, so patients have no idea what prompted their allergic reactions,"
allergist Ronald Saff, of the Florida State University College of Medicine,
told Business Insider.
What
prompted them was STARI, or southern tick-associated rash illness. People with
STARI may develop a circular rash like the one commonly seen in Lyme disease.
They may feel achy, fatigued, and fevered. And their next meal could make them
very, very sick.
Saff now
sees at least one patient per week with STARI and a sensitivity to
galactose-alpha-1, 3-galactose—more commonly known as alpha-gal—a sugar
molecule found in mammal tissue like pork, beef, and lamb. Several hours after
eating, patients’ immune systems overreact to alpha-gal, with symptoms ranging
from an itchy rash to throat swelling.
Even worse,
the more times a person is bitten, the more likely it becomes that they will
develop this dangerous allergy. The tick’s range currently covers the southern,
eastern, and south-central U.S., but even that is changing.
"We
expect with warming temperatures, the tick is going to slowly make its way
northward and westward and cause more problems than they're already
causing," Saff said.
We've
already seen that occur with the deer ticks that cause Lyme disease, and 2017
is projected to be an especially bad year. There’s so much we don’t understand
about alpha-gal sensitivity. Scientists don’t know why it happens, how to treat
it, or if it's permanent. All they can do is advise us to be vigilant and
follow basic tick-avoidance practices.
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