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Researchers within the South need folks to find out about an invasive ant species whose painful sting could cause deadly anaphylaxis in some folks – and disrupt native ecologies as effectively. 

Asian needle ants usually are not extensively recognized and sometimes meander outdoor individually, so it’s straightforward to overlook them and get stung. As temperatures develop hotter within the spring, the ants develop into extra energetic and folks spend extra time outdoors. 

Dan Suiter, an entomologist with the College of Georgia’s extension service, obtained calls from three folks in 2024 reporting being stung by Asian needle ants and requiring hospitalization for anaphylaxis, an allergic response that may be deadly. 

Suiter mentioned he needs to verify folks know in regards to the Asian needle ant to allow them to keep away from stings. Since he started placing out press alerts over the previous few years, he’s obtained many extra experiences from individuals who have been stung and wanted severe medical remedy. 

The species, found in Decatur, Georgia a couple of century in the past, possible arrived in america via worldwide commerce. 

The ant has been reported in additional than 20 states east of the Mississippi River, from Florida to Wisconsin, in response to knowledge from the International Ant Biodiversity Informatics venture on the College of Hong Kong.

One examine printed final 12 months discovered the ants thriving in a group mulch pile in Watkinsville, Georgia. Gardeners taking mulch from the pile could possibly be contributing to the ant’s native unfold, the authors wrote. 

The species has a 100-year head begin on researchers, they usually lack good historic knowledge as to how the ant has unfold in america, mentioned Christopher Hayes, an entomologist at North Carolina State College. 

How invasive ants can have an effect on the atmosphere

As with different invasive species – like kudzu – it’s too embedded within the atmosphere to efficiently take away it, Hayes mentioned. 

Within the Southeast, hearth ants and Joro spiders are well-known invasive species. 

Scientists are searching for to raised perceive the Asian needle ant: the place it’s, its habitat, and its environmental influence. That’s necessary, Hayes mentioned, as a result of the ant can hurt ecological techniques. 

“Every day, you may have these a number of species that they’re all the time competing with each other,” Suiter mentioned. Asian needle ants “out-compete” different ant species for meals, driving these species to “native extinction.” 

That’s an issue as a result of these species are sometimes chargeable for seed dispersal that enables native plant species to breed, he mentioned. 

Hayes mentioned he wish to determine learn how to protect native species and mitigate the Asian needle ant’s environmental influence. 

Painful sting can immediate anaphylaxis, phantom ache

Allergic reactions to stings by honeybees, wasps, and ants account for as much as 43% of anaphylaxis circumstances and about 20% anaphylaxis-related fatalities. That makes them an necessary, if generally underrecognized, public well being problem, in response to a 2022 examine.

Suiter mentioned people who find themselves allergic to bees and wasps and those that carry EpiPens ought to know what the Asian needle ant appears like to allow them to keep away from a probably severe allergic response. 

As temperatures heat and summers develop longer, Hayes mentioned, the Asian needle ant may have longer energetic seasons. Whereas the ants sometimes “hunker down” over the winter, they develop into extra energetic in hotter climate, which means folks may have extra possibilities of being uncovered to them. 

The ants don’t come indoors, as a substitute preferring moist environments, like downed logs, Suiter mentioned. 

The ants, whose scientific identify is Brachyponera chinensis, are brownish, measure 3/16-inch lengthy, and sometimes dwell in logs and leaf litter and below rocks and stones. 

“One of many methods to reduce the numbers of needle ants in your yard could be merely to scrub up all that,” Suiter mentioned. 

Asian needle ants are much less aggressive than hearth ants, Hayes mentioned. They’re “stealthier” and extra prone to be hidden in piles of wooden than the hearth ant mounds that Southerners are used to seeing. 

And whereas hearth ants usually tend to come pouring out of a mound and chunk folks a number of instances, Asian needle ants will “meander round in your arms” or different physique elements till they get squeezed, corresponding to in a gardener’s glove, prompting them to chunk, Hayes mentioned. 

In distinction to most different ant species that kind lengthy trails, Asian needle ants are inclined to go it alone. 

“While you see them in your yard or on the concrete, they’re simply form of meandering round as a single ant, they usually don’t actually garner your consideration” the way in which ants in lengthy trails may, Suiter mentioned. 

“With the Asian needle ant, their price of triggering anaphylaxis from a single sting is way increased than the speed of a hearth ant particular person sting triggering anaphylaxis,” Hayes mentioned. “The sting of an Asian needle ant is extra harmful on the person ant degree.”

Healthbeat is a nonprofit information platform reporting on public well being from Civic Information Firm and KFF Well being Information. For this piece, The Lens added Louisiana-specific reporting.

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