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Diphyllobothriasis
Diagnostic Methods
Diagnostic methodsPros and cons
Parasitological diagnosis 
Patients often observe short segments of the tapeworm (chain of proglottids) in their stools.
It is not difficult to confirm diagnosis by detecting the numerous eggs by microscopy. D. latum eggs are morphologically similar to operculated trematode eggs. Measurements allow differentiating D. latum (length under 80 µm) from Paragonimus westermani, which has larger eggs.
  • Parasitological diagnosis is without problems – no alternative methods are really needed
Molecular diagnosis 
No test developed 
Antigen detection 
No test available 
Antibody detection 
Serology inadequate for diagnosis