In which part of the body are helminthic infections commonly found?

Helminthic infections are primarily found in the gastrointestinal tract, particularly in the gastric tract, where these parasitic worms, such as roundworms, tapeworms, and flukes, reside and reproduce. The gastric tract provides an environment that is conducive for these parasites, allowing them to attach to the intestinal lining and absorb nutrients from the host's food. This is a common pathway for human infection, as many helminths are transmitted through contaminated food and water, or through soil that has been exposed to feces containing eggs. In this way, the gastrointestinal tract is the main battlefront in the fight against helminthic infections, making it the correct choice in this context.