Hookworm infection is caused by parasitic worms, primarily Ancylostoma duodenale and Necator americanus. These worms enter the body through the skin, often when a person walks barefoot on contaminated soil. Once inside, they attach to the intestines and feed on blood, which can lead to anemia and other health issues. Symptoms of hookworm infection may include abdominal pain, diarrhea, and fatigue. Diagnosis is typically made through stool tests to identify the presence of hookworm eggs. Treatment usually involves medications such as albendazole or mebendazole to eliminate the parasites and improve health.