What is the primary diagnostic tool for identifying a fish tapeworm infection?
Answer
Microscopic examination of stool samples
Identifying a *Diphyllobothrium* infection relies fundamentally on laboratory analysis because the general symptoms, when present, are often vague and non-specific, mimicking common digestive ailments. The definitive diagnostic procedure involves the microscopic investigation of stool samples collected from the patient. This process allows a technician to visually confirm the presence of either the parasite's eggs or segments of the mature worm, known as proglottids, which have passed out of the host's system. Confirmation through this specific testing method is essential for initiating correct treatment.

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