Nematodes: Roundworms Flashcards
"Intestinal: enterobius, ascaris, ancylostoma/necator, strongyloides, trichenella, anisakis, trichuris Tissue: Wuchereria, dracunculus, toxocara larvae, ancylostoma larvae, onchocerca, loa loa"
Enterobius vermicularis: pinworm
“Transmission: Food contminated with eggs
Egg with clear border”
“Pinworm. Tape test for eggs
Disease: intestinal infection causing anal pruritis (diagnosed via Scotch Tape test)
Eggs on perianal skin”
Ascaris: migrate into lung; giant roundworm
“Bumpy egg
Transmission: Fecal-oral; eggs visible in feces under microscope”
“Eosinophilia. Round worm
Disease: intestinal infection (both), microcytic anamia (Ancylostoma)”
Ancylostoma, Necator: migrate into lung; hookworm
“Transmission: Filariform larvae penetrate skin
Larvae in soil penetrate skin”
“Eosinophilia. Ground itch.
Disease: intestinal infection causing anemia by sucking blook from intestinal walls”
Strongyloides: migrate into lung
“Filariform larvae causes infection (instead of eggs).
Larvae in soil penetrate skin “
“Eosinophilia. Re-infection.
Disease: Intestinal infection causing vomiting, diarhea, anemia, rash, lung symptoms”
Trichenella
Transmission: pigs and rats
“Eosinophilia
Muscle inflammation, eye irritation, nailbed irritation”
Anisakis
L3 larval stage infectious to humans
Trichuris: Whipworm
“Nematode of intestine
Eggs with end caps “
Wuchereria
Transmission: female mosquito
“Disease: blocks lymphatic vessels: elephantiases
Takes 9months-1 year after bite to become symptomatic”
Dracunculus
Transmission: in drinking water
“Wind worm out on stick. Acquired by ingestion contaminated water
Disease: skin inflammation and ulceration
Guinea worm, skin ulcer”
Onchocerca volvulus
“Transmission: female blackflies
Microfiliaria”
“Disease: inflammatory skin nodules, river blindness, rash, lizard skin, hyperpigmented skin
“
Loa Loa
Deer (mango fly) transmission
Can see adult form crawling across conjunctiva; swelling in skin
Toxocara larvae
“Dog roundworm (Ascarid)
Transmission: food contaminated with eggs”
“Visceral larva migrans
“
Ancylostoma larvae
Dog hookworm
Cutaneous larva migrans
