Chagas Disease: A Silent Threat to Pets in South Texas

By Heather Gulde – Terrell Heights Veterinary Hospital Manager

Chagas disease, also known as American trypanosomiasis, is an often-overlooked but serious health threat to dogs and cats—especially in South Texas, including the 78209 area. Caused by the parasite Trypanosoma cruzi and spread by the “kissing bug” (a type of blood-sucking insect), Chagas disease can lead to serious heart issues and even sudden death in pets.

Dogs are more commonly affected than cats, often becoming infected by eating the kissing bug or through contact with contaminated feces. Many times pets will eat the insects and the parasites will enter the body through the mucous membranes (the gums). Once inside the body, the parasite targets the heart and other tissues, leading to inflammation, arrhythmias, and heart failure. Unfortunately, many pets show no symptoms until the disease has progressed significantly.

Common signs include lethargy, loss of appetite, coughing, and signs of heart failure such as a swollen belly or fainting. If you notice these symptoms, especially in an outdoor or hunting dog, a veterinary evaluation is essential. Blood tests and imaging can help detect the disease, although diagnosis can be challenging.

There is currently no cure for Chagas disease in pets, so prevention is critical. Reduce exposure by keeping pets indoors at night, using pest control around your home, and removing brush or wood piles where kissing bugs may live.

Awareness is the first step toward protecting your pets. Talk to your veterinarian about Chagas disease—early detection could save your pet’s life.