Up to date April 28, 2026 09:35PM
As hikers, we’re used to checking our pits for ticks and swatting away mosquitoes. However there’s one other blood-sucking bug price awaiting: the kissing bug. These bugs are identified to hold the parasite Trypanosoma cruzi that causes Chagas illness in people and animals.
Generally discovered throughout Central and South America and the southern U.S.—particularly in Florida and Texas, the place researchers are learning them carefully—kissing bugs have now been documented in 29 states. It’s nonetheless unclear, nonetheless, whether or not they’re shifting north or have lengthy been current however neglected.
“The extra we search for them in america in areas the place we thought they weren’t, we’re discovering them,” says Norman Beatty, an infectious illness specialist on the College of Florida Faculty of Medication.
We talked to Beatty and one other main researcher to raised perceive the bug and the illness—together with identification, transmission, and illness manifestation.
What are kissing bugs?
Also called triatomine bugs, kissing bugs feed on blood from folks and animals, resembling canine. They get their identify from the assumption that they aim the mouth or face—like a kiss—however they’ll chunk wherever inside attain.
Roughly one to 2 inches lengthy, they’re sometimes darkish with reddish or orange markings alongside the sides of their our bodies. They’re usually confused with bugs just like the North American wheel bug and leaf-footed bugs, which don’t unfold illness.
In contrast to ticks and mosquitos, which may transmit parasites via spit after they feed, kissing bugs move alongside the parasite via their poop. Oftentimes the soiled little issues will feed and poop in the identical spot. An infection can happen if the parasite is rubbed into the chunk, eyes, or mouth. One other method the parasite spreads is thru contaminated meals or drink merchandise.
Kissing bugs are nocturnal and have a tendency to feed whereas hosts are nonetheless or sleeping. However throughout peak season in late spring and early summer time, they could be extra aggressive. Beatty says he has had one fly onto him and try and chunk in Florida.
Whereas kissing bugs are extra identified within the southern U.S., they’ve been documented in states together with California, New Mexico, and Arizona. States the place they’ve solely been discovered just a few occasions embody Delaware, Illinois, Indiana, New Jersey, Pennsylvania, and West Virginia.
Led by Professor Sarah A. Hamer, the Hamer laboratory at Texas A&M College’s Faculty of Veterinary Medication and Biomedical Sciences has discovered that about 50 % of kissing bugs within the U.S. are contaminated with the Chagas parasite, which causes a doubtlessly critical sickness.
The Hidden Threat of Kissing Bugs
Kissing bugs are sneaky, says Beatty, partly as a result of their bites usually go unnoticed. Their mouthparts are very skinny—nearly like a tiny needle—and the chunk itself is usually painless. Reactions range extensively: Some victims by no means understand they’ve been bitten, whereas others can expertise extreme allergic responses, together with anaphylaxis.
Chagas illness might be simply as tough to detect. As a uncared for tropical illness, it receives comparatively little analysis consideration and funding.
The preliminary, or acute, section lasts just a few weeks and signs usually resemble frequent diseases just like the flu. Sufferers might expertise fatigue or a fever.
“You’ve a tough time recognizing the preliminary signs as a result of they’re so obscure,” Beatty says. Many individuals recuperate from this section with out ever figuring out they have been contaminated—and lots of don’t know to get examined within the first place. For each people and canine, Hamer says, the illness is commonly recognized through the continual section, which may develop many years after an infection and by which era it’s usually too late to utterly remedy.
Human instances in america are comparatively uncommon, however the consequence might be impactful. It could have an effect on the center and gastrointestinal system, and typically different organs. People who find themselves immunocompromised might face extra extreme sickness, Beatty says.
Sadly for canine, Chagas illness is extra frequent. Puppies particularly can develop an entire spectrum of diseases, together with cardiac illness. Fortunately, many stay asymptomatic.
What to Do If You Discover a Kissing Bug
Within the U.S., hikers and different individuals who spend time sleeping outdoors are at greater threat for Chagas illness, with Bradford McGwire, a doctor and professor on the Ohio State College, writing that the comparatively small variety of instances that happen within the U.S. largely contain folks tenting in tents, cabins, or trailers.
In case you discover a kissing bug both in camp or in your house, you may submit it for identification at kissingbug.tamu.edu. Don’t deal with the insect with naked palms. Hamer recommends inverting a plastic bag to scoop it up or utilizing a container to seize it safely. Freeze the bug to kill it, after which ship it to Texas A&M’s Kissing Bug Group Science Program.
Hamer says they’ve obtained greater than 10,000 kissing bug submissions since 2013, many present in properties and outside areas, and round pets. Each helps researchers check for an infection, establish parasite strains, and higher perceive how the bugs work together with people and animals.
Beatty says that in case you’ve been round kissing bugs or suspect you could have been bitten, attain out to your physician or healthcare supplier to get examined.
