Texas A&M spotlights Chagas risk from kissing bugs in dogs

A Texas A&M educational feature on kissing bugs and Chagas disease in dogs is putting fresh attention on a vector-borne disease that many small animal clinicians still see as regional, rare, or difficult to confirm. The message from Sarah Hamer, DVM, PhD, and colleagues is straightforward: Trypanosoma cruzi remains a real canine health threat, especially in the South, and the route of transmission is often misunderstood. The parasite is carried in kissing bug feces rather than saliva, and dogs may also be infected by ingesting the insect. (kissingbug.tamu.edu)

That matters because the disease’s profile in dogs has shifted from obscure parasitology topic to an active One Health surveillance issue. Texas A&M has spent years building a research and community science infrastructure around kissing bugs, canine infection, and household risk. More recently, the school’s Canine Chagas Collaborative and related projects have expanded work on diagnostics, epidemiology, and treatment, including studies in pet dogs seen through the Small Animal Teaching Hospital. (kissingbug.tamu.edu)

The broader epidemiology supports that increased attention. According to CDC’s 2025 review of Chagas disease in the U.S., triatomine bugs occur naturally across the southern half of the country and have been identified in 32 states. The same review says dogs exposed to T. cruzi have been found in 23 states, plus Washington, DC, and the U.S. Virgin Islands. In Texas, where canine Chagas was once reportable, 431 canine cases were recorded from 2013 through 2015 before the reporting requirement ended. (wwwnc.cdc.gov)

Texas A&M’s veterinary guidance highlights the clinical challenge: many infected dogs never show obvious signs, while others present late with cardiac injury. The school’s canine resource page notes that diagnosis typically relies on a combination of suspicion, positive serology, and, in some cases, compatible ECG or echocardiographic findings. Outside the acute phase, chronic infection may surface as arrhythmias, myocarditis, or dilated cardiomyopathy-like disease. Texas A&M’s Veterinary Medical Diagnostic Laboratory offers testing, which may help practices that don’t routinely think of Chagas when working up unexplained rhythm disturbances or sudden death. (kissingbug.tamu.edu)

Research from the Texas A&M group also helps explain where exposure risk may concentrate. A 2024 Acta Tropica paper from the Canine Chagas Collaborative reported abundant triatomines in Texas multi-dog kennel environments and evaluated both infection status and bloodmeal hosts. The paper’s summary and related Texas A&M materials suggest kennel settings can create sustained exposure opportunities, especially where dogs, wildlife reservoirs, lights, and peridomestic harborage overlap. (pubmed.ncbi.nlm.nih.gov)

Expert commentary from Texas A&M adds nuance for clinicians counseling pet parents. In AKC’s recent coverage, Hamer said transmission to dogs may commonly occur when they accidentally or intentionally eat a kissing bug, while cardiologist Ashley Saunders noted that many canine infections go unrecognized until late-stage heart disease appears. Saunders and Hamer are also involved in an AKC Canine Health Foundation-backed study of a modified benznidazole protocol, reflecting how limited and evolving the treatment landscape remains in veterinary medicine. (akc.org)

Why it matters: For veterinary teams, this is less about a single awareness article and more about a growing case for earlier recognition. In endemic-risk regions, especially Texas and other southern states, Chagas belongs on the differential list for young or middle-aged dogs with ventricular arrhythmias, syncope, myocarditis, or sudden death, as well as for outdoor, working, sporting, kennel-housed, or hunting dogs. It also has implications for client communication: infected dogs are not known to directly transmit Chagas to people, but a positive dog can signal local exposure to infected vectors and a broader household or property risk environment. (kissingbug.tamu.edu)

What to watch: The next developments are likely to come from Texas A&M’s ongoing treatment and staging studies, plus continued surveillance work that may sharpen regional risk maps, diagnostic pathways, and prevention advice for practices serving dogs in vector-prone areas. (vetmed.tamu.edu)