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Diphyllobothrium latum

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Diphyllobothrium latum

Parasitology

Ectoparasites

Pediculus humanus and Phthirus pubis (Lice)

Sarcoptes scabiei (Scabies)

Protozoa

Acanthamoeba

Naegleria fowleri (Primary amebic meningoencephalitis)

Toxoplasma gondii (Toxoplasmosis)

Cryptosporidium

Entamoeba histolytica (Amebiasis)

Giardia lamblia

Babesia

Plasmodium species (Malaria)

Leishmania

Trichomonas vaginalis

Trypanosoma brucei

Trypanosoma cruzi (Chagas disease)

Worms

Diphyllobothrium latum

Echinococcus granulosus (Hydatid disease)

Ancylostoma duodenale and Necator americanus

Angiostrongylus (Eosinophilic meningitis)

Anisakis

Ascaris lumbricoides

Enterobius vermicularis (Pinworm)

Guinea worm (Dracunculiasis)

Loa loa (Eye worm)

Onchocerca volvulus (River blindness)

Strongyloides stercoralis

Toxocara canis (Visceral larva migrans)

Trichinella spiralis

Trichuris trichiura (Whipworm)

Wuchereria bancrofti (Lymphatic filariasis)

Clonorchis sinensis

Paragonimus westermani

Schistosomes

Assessments

Diphyllobothrium latum

Flashcards

0 / 6 complete

USMLE® Step 1 questions

0 / 1 complete

High Yield Notes

4 pages

Flashcards

Diphyllobothrium latum

of complete

Questions

USMLE® Step 1 style questions USMLE

of complete

A 37-year-old woman is hospitalized for small bowel obstruction. Two months ago she traveled around the Baltic Sea and ate several meals consisting of raw fish. Temperature is 38.1°C (100.6°F), blood pressure is 125/77 mmHg, and pulse is 90/min. Laboratory studies reveal a hemoglobin of 9.1 g/dL (reference range: 12.0-16.0 g/dL) and mean corpuscular volume of 109 μm3 (reference range: 80-100 μm3). A stool sample is collected and is found to contain several eggs. Which of the following pathologies is most likely responsible for this patient’s clinical presentation? 

External References

First Aid

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Anemia

Diphyllobothrium latum p. , 157

Diphyllobothrium latum

BNaN deficiency p. 428

disease association p. 158

presentation p. 157

vitamin BNaN deficiency p. 67

Megaloblastic anemia p. 425, 428

Diphyllobothrium latum p. , 157

Vitamin BNaN deficiency p. 428

Diphyllobothrium latum p. , 157, 158

Summary

Diphyllobothrium latum is a parasitic cestode (flatworm) contracted by ingesting raw freshwater fish, hence its reputation as the fish tapeworm. The parasite attaches to the lining of the intestine and disrupts the absorption of vitamin B12, causing its deficiency. It presents with features of vitamin B12 deficiency, including macrocytic megaloblastic anemia. Symptoms can include abdominal pain, diarrhea, weight loss, and anemia.

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