Intestinal Nematodes: Ascaris and Hookworm

Intestinal nematodes, including Ascaris lumbricoides (roundworm) and hookworms (Ancylostoma duodenale, Necator americanus), represent major soil-transmitted helminthiases affecting millions in tropical and subtropical regions, including Zambia. This core topic in medical parasitology for tertiary students covers the epidemiology, life cycles, pathogenesis, and clinical impact of these geohelminths. The curriculum details the fecal-oral transmission of Ascaris eggs, the larval lung migration phase, and the blood-feeding activity of adult hookworms leading to iron-deficiency anemia. For students in Zambian universities studying public health, medical laboratory science, or medicine, understanding these parasites is fundamental. The module emphasizes laboratory diagnosis through stool examination for characteristic eggs, preventive chemotherapy strategies, and the integration of deworming programs into public health initiatives. Excelling in this topic equips learners with knowledge to address a common cause of childhood malnutrition and developmental delay, aligning with national health priorities and forming a key component of parasitology examinations.