Final answer:
Pinworm (Enterobius vermicularis) is true. Enterobius vermicularis, or pinworm, is a nematode that causes enterobiasis, a common helminthic infection in the US, especially in children, transmitted through the fecal-oral route.
So, the correct answer is A.
Step-by-step explanation:
The most common intestinal helminth infection in the United States is caused by the nematode Enterobius vermicularis, commonly known as pinworm. This parasitic worm causes a condition known as enterobiasis, predominantly affecting children. The adult female pinworm exits the body at night to lay eggs around the anus, leading to symptoms such as itching and insomnia.
The eggs, once laid, can be transmitted via fecal-oral route, often because of scratching the anaaal area and then later bringing fingers to the mouth or touching objects that others may touch. This cycle continues as the ingested eggs hatch in the small intestine and mature into adults in the colon.
So, the correct answer is A) True.