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Definitive hosts Humans, domestic pets, other mammals
D latum is the largest known vertebrate tapeworm, measuring 10 meters in length with 4000 proglottids—most distal proglottids disintegrate, releasing eggs into the faeces; these mature and hatch into ciliated coracium, which are ingested by the first intermediate host, an aquatic arthropod, the copepod, and then ingested by a second intermediate host, a freshwater fish—e.g., salmon, trout, and whitefish; the eggs develop into procercoid larvae in the fish muscle and viscera and are eaten by man as raw fish and the cycle continues
Patients often report abdominal pain, weight loss, digestive disorders, progressive weakness, and symptoms of pernicious anemia because the worm absorbs ingested vitamin B12 from the gastrointestinal tract.
Praziquantel is used to treat the infestation.