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24 Cards in this Set
- Front
- Back
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What do cestodes lack (in reference to digestion)?
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an intestinal tract
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How do they absorb nutrients?
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through there integuments
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What part of the cestode attaches to the mucosa of the host's intestine?
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The scolex (head)
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Where are the gonads located?
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in each segmented body (proglottids-they contain both male and female)
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Can the worms live without a host?
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No. They are parasites and require a host, within which they can mature
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another name for Hymenolepis Nana
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the dwarf tapeworm
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How long do they grow?
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15 to 40 mm in length
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Where is HN found?
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worldwide (actually MC worldwide of all cestode infection)
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A less frequent, closely related tapeworm in the same class…
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Hymenolepis diminuta
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Infection that Hymenolepis Nana causes…
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Hymenolepiasis
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How does one become infected with HN?
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Ingestion of eggs (direct fecal-oral exposure)
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In which part of the small intestine does HN normally penetrate?
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The illeum, where it penetrates the lamina propria (a part of the mucosa), and attaches to the villus.
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How many eggs do the proglottids generate daily?
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hundreds
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What are signs and sxs of hymenolepiasis?
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MOSTLY ASYMPTOMATIC, but may have restlessness, irritability, diarrhea, abd pain, restless sleep, anal and nasal pruritis.
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What doe the level of symptoms depend upon?
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The worm burden (the more worms present, the worse the sxs)
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What will the patients eating habits be?
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This is a RARE sx, but a person could either be anorexic or have increased appetite
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Would the patient have bloody diarrhea?
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It is also a rare sx, but yes
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What about Nausea and Vomiting?
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Again, rare but, yes
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Which animal feces are these eggs also transmitted from?
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Rat feces
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What are other RARE signs and sxs can be found in a patient with Hymenolepsis?
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Seizures, Behavioral disturbances, Headache, Dizziness, Hives, and Extreme pain (again, these signs and sxs are rare, as most patients are assymptomatic)
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What will the PE reveal?
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Most PE's are unrevealing (there may be some rare urticaria and abdominal tenderness)
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What will the labs show?
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Eosinophilia exceeding 5%, Eggs in stool specimens. (sections of the adult worm are rarely discovered)
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What is the treatment for Hymenolepiasis?
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Praziquantel (Biltricide) and supportive care
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Case study catch phrases…
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1. diarrhea, abd pain, and anal pruritis, 2. ocassional blood in stool, 3. Patient had been to summer camp, 4. mild abd tenderness, 5. Eosinophilia on CBC, 6. Eggs in stool
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