Definition
Gasterophilus refers to a genus of botflies, primarily known for parasitizing horses and other equids. These flies lay their eggs on the host animal, often on the legs or mane. When the horse grooms itself, it ingests the eggs, which then hatch into larvae within the horse's digestive tract. These larvae, or bots, attach to the stomach lining, where they feed and develop. While usually not fatal, heavy infestations can cause discomfort, digestive issues, and even ulcers in the horse. Think of them as tiny, unwanted house guests crashing in your horse's stomach.