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Enterobius vermicularis (Pinworm)

Foundational SciencesMicrobiologyParasitologyWormsNematodes (roundworms)

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Enterobius vermicularis (Pinworm)

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

Summary

Enterobius vermicularis is a small parasitic worm that lives in the human large intestine. People get infected with pinworms via the feco-oral route, and its classical symptoms is pruritus around the anus, but can also cause insomnia, irritability, and weight loss. Diagnosis requires the visualization of the eggs on a scotch tape test.

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Flashcards

Enterobius vermicularis (Pinworm)

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Questions

USMLE® Step 1 style questions USMLE

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A 7-year-old boy is brought to the pediatrician by his parents for evaluation of abdominal pain, which has been ongoing for the past 2 weeks. The pain is dull and intermittent. In addition, the parents have noticed that the patient frequently scratches his perianal region while asleep. Temperature is 37.5°C (99.5°F), blood pressure is 102/73 mmHg, and pulse is 87/min. Examination of the heart, lungs, and abdomen are unremarkable. Erythema is noted in the perianal region. A tape test is performed and reveals multiple ovoid eggs under microscopy. Which of the following pathogens is most likely responsible for this patient’s symptoms?