Tapeworm Diagnosis: Stool O&P Is Gold Standard—No Blood Test

There is no blood test for tapeworm infection. Diagnosis relies on:

• Stool O&P (ova and parasites): Microscopic identification of proglottids (segments) or eggs — requires 3 specimens on different days (sensitivity ~90%)
• Scotch tape test: Perianal application for Taenia/Hymenolepis eggs
• PCR panels: Multiplex GI PCR (increasingly used; higher sensitivity, speciation)
• Serology: Only for cysticercosis (larval T. solium in tissues), not intestinal taeniasis

Clinical Clues

• Passed proglottids (motile, rice-grain size) in stool/underwear
• Eosinophilia (mild, nonspecific)
• Neurocysticercosis: seizures, headaches (requires brain MRI + serology)

Treatment: Praziquantel (adult tapeworms) or albendazole (cysticercosis). Single dose usually curative for intestinal infection.