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Erstellt von mary nguyen
vor mehr als 9 Jahre
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Frage | Antworten |
nematode | roundworm |
cestode | tapeworm |
trematode | fluke |
pinworm (enterobius vermicularis)
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scotch tape test
most common childhood worm infection
live in caecum
eggs flat on one side, round on the other
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ascaris lumbricoides
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HUGE! live in upper small intestine
diagnose by looking in stool
problems caused by migration - general anesthetic or fever irritate worms and cause them to crawl around --> jaundice when get to biliary tree
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whipworm (trichiuris trichura)
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soil transmitted helminth
biopurculated (lemon) eggs
light infestations aymptomatic
heavy infestations -> dysentery and blood loss in stool
causes trichuirs dysentery syndrome: rectal bleeding/prolapse, anemia, finger clubbin and growth stunting
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soil transmitted helminths | all nematodes: ascariasis hookworm trichuriasis |
intestinal hookworms (2) | ancyclostoma duodenale necator americanus pulmonary symptoms (cough, wheeze, bloody sputum with transient eosinophilia) occur when larvae migrate thru lungs to intestine intestinal infection usually asymp but heavy infestation = anemic |
cutaneous larva migrans | skin disease caused by hookworms most commonly caused by non-human hookworms ancyclostoma brasiliense |
threadworm (stronglyoides stercoralis)
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the only helminth that can reproduce in the body filariform larvae penetrate intact skin and cause pruritis and unusual skin eruptions |
anisakis spp. | assoc with sashimi haul out with endoscope |
tissue nematodes | trichinella spiralis dracunculus medinensis (guinea worm) filariases |
trichinella spiralis
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get from eating undercooked pork, bear, walrus, or cougar jerky assoc with periorbital edema |
onchocerca volvulus (river blindness)
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larva transmitted by black flies prominent subcutaneous nodules microfilaria migrate to skin in daytime -> chronic skin problems migrate to cornea -> scarring + corneal opacity |
guinea worm (dracunculus medinensis) | subcutaenous filariasis prevented by filtration of larvae infected copepods from drinking water |
subcutaneous filariasis | mansonella streptocerca loa loa onchocerca volvulus (river blindness) dracunculus mediensis (guinea worm) |
lymphatic filariasis (WBB) (3) | wucheraria bancrofti brugia malayi brugia timori cause elephantiasis |
wucheraria bancrofti | lymphatic filariasis mosquito acquired larvae migrate to lymphatics and develop into adults, blocking lymph vessels microfilariae into blood or lungs -> tropical pulmonary eosinophilia |
serous cavity filariasis | serous cavity of abdomen mansonella perstans mansonella ozzardi |
cestodes (tapeworms) (4) | dwarf (hymenolesis nana) beef (taenia saginata) pork (taenia solium) fish (diphyllobothrium latum) |
dwarf tapeworm (hymenolepsis nana)
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most common tapeworm in USA and latin america the only human tapeworm without an obligatory human host |
pork tapeworm (taenia solium)
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acquired by ingestion of undercooked pork armed scolex lead to cysticercosis |
fish tapeworm | undercooked or raw freshwater fish vitamin B 12 deficiency |
trematodes (4) aka flukes (BILL) | blood fluke lung fluke liver fluke intestinal flule |
lung fluke (paragonimus westermani)
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undercooked crabs or crayfish duodenum to peritoneum to lungs most common cause of hemoptysis paragonimiasis: mostly asymptomatic but pleuritic pain and hemotypsis can be there. |
schistosoma mansoni
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blood fluke - intestinal eggs in stool lateral spike |
katayama fever | acute phase of schistosomiasis fever, urticaria, diarrhea, myalgia due to hypersensitivity to developing schistosomes |
snail fever
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chronic phase of schistosomiasis due to egg deposition and inflammation fibrosis |
schistosoma haematobium | blood and eggs in urine terminal spike on eggs blood fluke |
beef tapeworm | Motile proglottids: segment of the tapeworm; contain both male and female reproductive organs Acquired by ingestion of rare beef |
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