Final answer:
Dr. Clark was worried about tapeworm infection in other body sites because tapeworms can migrate to different tissues and organs, causing various symptoms and health complications.
Step-by-step explanation:
Dr. Clark was worried about tapeworm infection in other body sites because tapeworms can migrate to different tissues and organs in the body, causing various symptoms and health complications. For example, the larvae of the pork tapeworm (T. solium) can travel to the central nervous system and cause neurocysticercosis, which can lead to headaches and seizures. Additionally, tapeworm larvae can infiltrate skeletal and smooth muscles, resulting in pain and discomfort.