The name "kissing bug" doesn't quite communicate the danger of the infection that insects with that moniker can spread.\r\nThese bloodsucking bugs, called triatomine bugs, spread a parasitic illness called Chagas disease. Left untreated, Chagas causes serious cardiac or intestinal complications in about 30% of patients,\u00a0according to the Centers for Disease Control and Prevention. These complications can lead to heart failure and sudden death.\r\nBecause many people don't show signs of infection, medical researchers\u00a0have described Chagas\u00a0as a "silent killer."\r\nChagas has typically been found in Central America and South America, but the disease is becoming more common in the US, Canada, Europe, Australia, and Japan,\u00a0according to a recent statement\u00a0from the American Heart Association and the Inter-American Society of Cardiology. The groups warn that doctors outside Latin America must become more aware of the disease so they can recognize, treat, and control it.\r\nThe AHA estimates that about 300,000 people are infected with Chagas in the US right now and that about 6 million people are infected around the world.\r\nChagas infections occur in a disturbing fashion.\r\nDuring the night, certain species of triatomine bugs crawl on people, dogs, or other mammals to feed. They often bite on the face, especially near the eyes or mouth \u2014 hence the "kissing bugs" name.\r\nOf more than 100 species of triatomine bugs, about 12 are considered important transmitters of Trypanosoma cruzi, the parasite that causes Chagas.\r\nWhen these bugs eat, they typically defecate, leaving feces that may contain the parasite. If these feces get rubbed into the bite wound or into mucous membranes in the eyes or mouth, people can get infected.\r\nMost people don't show signs of infection, though some people develop swollen eyelids if that's where the infection first occurs. During the early phase of infection, some people experience fairly common symptoms of sickness like fever, fatigue, body aches, headaches, or a rash,\u00a0according to Texas A&M's Chagas research team.\r\nIn some cases, people may experience diarrhea or vomiting, and a small percentage of young children can experience swelling in the heart or brain that can lead to death.\r\nDoctors can diagnose the condition with blood tests and treat it with antiparasitic medications. But if patients aren't treated, they can develop the chronic form of the illness, and about 30% of those develop an enlarged heart. That can lead to further complications, including stroke, irregular heart rate, or heart failure.\r\nIn the US, there are at least 11 species of triatomine bugs, some of which transmit Chagas. In the US, the infection is most common in Southern states, including Texas, Florida, and California.\r\nAs Chagas disease has spread and infected people have migrated to different parts of the world, other forms of transmission have become more common. Chagas can also be passed through blood transfusions or organ donations and from pregnant women to their children.\r\n"Transmission through these routes is a global problem and can occur wherever infected individuals reside," the authors of the recent warning wrote.\r\nThis isn't the first time in recent years when doctors have sounded the alarm about Chagas. The epidemiologist Melissa Nolan Garcia, then of Baylor College of Medicine in Houston,\u00a0made a similar statement\u00a0after\u00a0presenting research\u00a0on Chagas rates in Texas at a meeting of the American Society of Tropical Medicine and Hygiene in 2014.\r\n"We were astonished to not only find such a high rate of individuals testing positive for Chagas in their blood, but also high rates of heart disease that appear to be Chagas-related," Garcia said.\r\nThe illness has continued to spread since then, without sufficient awareness, according to the new statement.\r\nChagas has long been considered a\u00a0neglected parasitic infection. Local transmission has largely been stopped in some places where the disease used to spread, like Chile, but further spreading and blood-supply contamination are making the disease a broader concern. It's an infection that we need far better information on, according to the statement.\r\nThe new statement also says estimates of infected populations need to be improved, as do diagnostic and treatment options. Particularly urgent are new, less toxic drugs that are more effective and can be taken during pregnancy, unlike current options.\r\nIf these issues aren't addressed soon, the number of cases \u2014 and severe heart problems related to those cases \u2014 could continue to climb.