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31 Cards in this Set
- Front
- Back
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What is the most common trichinosis causing agent in the US?
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Trichinella Spiralis
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What causes the disease symptoms in trichinosis?
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larval worms in host muscle
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How do you usually get trichinosis?
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through pork or bear meat consumption
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What two life cycles exist for trichinosis?
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domestic- with pig/rat/dog and people
sylvatic (feral) cycle |
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What happens in the intestinal phase of trichinosis?
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here there is worm reproduction and larval penetration from the gut into tissues
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What happens in the parenteral phase of trichinosis?
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here there is an inflammatory response to the larvae that escaped the gut
the larva enter the skeletal muscles |
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What are 'nurse cells'
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these are modified muscle cells that form around trichinosis larva.
these evenutally calcify |
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What are clinical signs of trichinosis?
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muscle pain and dysfunction
eosinophilia periorbital edema, myosistis, fever, diarrhea |
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Will smoking, salting, or drying meat kill trichinosis larvae?
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no it will not
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What agent causes Visceral larva migrans aka Toxocariasis?
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this is caused by toxocara canis.
a roundworm of dogs |
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Who usually gets Visceral larva migrans aka Toxocariasis infections?
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this is more common in children who play with puppies
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What is the infective stage of Visceral larva migrans aka Toxocariasis?
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egg ingestion from dog poop (or wherever the eggs happen to land)
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What are the clinical signs of Visceral larva migrans aka Toxocariasis?
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Fever
Hepatomegaly marked eosinophilia |
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Where is the most common site for granuloma formation in Visceral larva migrans aka Toxocariasis?
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the liver
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How does Visceral larva migrans aka Toxocariasis affect the eye?
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this can have unilateral involvement in older children/adults
looks like retinoblastoma |
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What is used to diagnose Visceral larva migrans aka Toxocariasis?**
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Hyperglobulinemia with presence of Forssman antibody and isohemagglutinins
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What causes Cutaneous larva migrans?
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Ancylostoma caninum, the dog hookworm
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How do people get Cutaneous larva migrans?
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by hookworm penetration of the skin via Larva*
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Where in the US is Cutaneous larva migrans endemic to?
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beaches in south eastern US. (new jersey to the keys)
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What are the clinical signs of Cutaneous larva migrans?
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linear burrow/papules, or lesions (tracks of the hookworm burrowing through the tissues)
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How do you diagnose Cutaneous larva migrans?
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this is done based upon the clinical signs
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What is the treatment for Cutaneous larva migrans?
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thiabendazole
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What causes anisakiasis?
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this is a caused by the larvae of various species of marine nematodes
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how do people get anisakiasis?
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ingestion of improperly cooked fish or squid
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Where in the world is anisakiasis most common?
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this is most common in japan
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What does anisakiasis larva do upon entering the body?
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this penetrates the mucosa and submucosa, which is then followed by worm death and eosinophilic graunloma formation
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What are the clinical signs of anisakiasis?
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epigastric pain, nausea, vomiting. may seem like peptic ulcers
Xray- gastric/intestinal mass Leukocytosis |
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What is Baylisascaris procyonis?
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this is the common intestinal roundworm of raccoons
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What is the infective stage of Baylisascaris procyonis?
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eggs from raccoon poop
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What happens after you become infected with Baylisascaris procyonis eggs?
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the juveniles hatch, and wander rather aggressively around the body prior to their death
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What are the severe effects of Baylisascaris procyonis infection?**
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neurological problems
blindness death |
