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15 Cards in this Set
- Front
- Back
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What is the organization of the Helminths?
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Nematodes (Roundworms)
Platyhelminthes (Flatworms) -Trematodes (Flukes) -Cestodes (Tapeworms) |
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What is the supermodel nematode?
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Caenorhabditis elegans
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I'm variable in size, long, cylindrical, tapered, non-segmented, "Tube within a Tube", carry male and female, and have no legs. My lifecycle starts with eggs and progresses by molting. What am I?
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A Nematode
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I have a fecal-oral transmission route (develop in the soil) with no intermediate host/vector. My egg has "champagne corks". I have an Infective stage (eggs in soil~years), Ingested (hatch Sm. Intestine, migrate to Large Intestine) and Diagnostic stage (eggs in feces). I never leave the intestine. What am I?
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Trichuris trichuria (Whipworm)
Asymptomatic with Low worm burdens Moderate to heavy worm burdens - Rectal Prolapse |
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How do you prevent Trichuris trichuria (Whipworm)?
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Improve sanitation, prevent food/water contamination.
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I have a fecal-oral transmission, no intermediate host/vector. Im the largest worm you'll see. Im infective as an egg (soil), develop in the intestine, go to the liver, the lung, back to the intestine. Can emerge from the mouth or nose. What am I?
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Ascaris lumbricoides (Large Intestinal Roundworm) - large means size, NOT Large intestine
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Pt's CC: Abd pn, loss of appetite, altered nutrition and cognition, obstruction, vomiting, constipation, volvus, intususseption, gangrene, perforation = Intestinal in children?
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Ascaris lumbricoides (Large Intestinal Roundworm)
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Pt's CC: Cough, pneumonitis, Loeffler's syndrome, Allergic response?
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Ascaris lumbricoides (Large Intestinal Roundworm)
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Can induce migration, can reinfect, and evidence parasite specific IgE is protective. Most Common helminthic infection in humans?
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Ascaris lumbricoides (Large Intestinal Roundworm)
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How do you diagnose Ascaris lumbricoides (Large Intestinal Roundworm)?
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Eggs, peripheral Eosinophilia, Radiologic imaging (whirlpool), Ultrasound (worm movement)
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Are Trichuris and Ascaris eggs infective immediately?
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No
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How do you treat Ascaris lumbricoides (Large Intestinal Roundworm)?
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Albendazole or mebendazole (single dose)
Reinfection is common |
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Can humans be infected with Ascaris suum (Pig large intestinal roundworm)?
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yes, accidental host
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Your patient gets sick after eating sushi. S/S in hrs (abd pn, n/v, larvae may be coughed up, may present like Crohn's disease. What parasite is in your differential?
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Anisakiasis (Anisakis simplex (herring worm)/ Pseudoterranoza decipiens (cod worm)
humans are an accidental host |
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What's the infective stage/ diagnostic stage of (Anisakis simplex (herring worm):
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Infective: Larvae in fish/squid
Diagnostic: Larvae in stomach/intestine |
