Cestode Infections: Taeniasis and Cysticercosis

Cestode infections, particularly those caused by Taenia saginata (beef tapeworm) and Taenia solium (pork tapeworm), are important food-borne parasitic zoonoses. This advanced parasitology topic is crucial for tertiary students in Zambia studying veterinary public health, medical laboratory science, or medicine. The module distinguishes between intestinal taeniasis (adult worm infection) and cysticercosis (tissue infection with larval cysts), with emphasis on the severe neurocysticercosis caused by T. solium. Students will explore the life cycles involving human definitive hosts and bovine or porcine intermediate hosts, transmission through undercooked meat, and the unique autoinfection risk with T. solium. Diagnostic methods include stool examination for proglottids and eggs, serology for cysticercosis, and neuroimaging. The public health implications, including economic impact on livestock and the burden of epilepsy in endemic regions, are discussed. Understanding these infections is key for examinations and for professionals involved in meat inspection, neurological medicine, and integrated One Health approaches to disease control in Zambia.