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01:146:329 Lecture Notes - Lecture 4: Strongyloides Stercoralis, Pinworm Infection, Ascaris LumbricoidesExam

Cell Biology and Neuroscience
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Lab 4: Intestinal Nematoda
-Aka roundworms
-Unlike the other helminths we have looked at, nematodes have a complete gut (mouth and anus)
and a protective cuticle over their epidermis
A. Enterobius vermicularis
B. Trichuris trichiura
C. Ascaris lumbricoides
D. Strongyloides stercoralis
1. Draw the generalized life cycle for Nematodes.
2. Please draw the generalized adult morphology for Nematodes.
3. Are Nematodes monoecious or diecious?

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A. Enterobius vermicularis
-AKA pinworm
-Female: long, pointed, “pin-like” tail
-Male: blunt, slightly curved posterior end
-Very common parasite in children
-Associated with appendicitis in children
1. Draw the life cycle of Enterobius vermicularis.
2. Draw the egg of this species.
3. Draw an adult male and female.
4. How is this infection diagnosed?
5. Why are infections so common in children?
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