Helminths Flashcards
Ascaris lumbricoides
often occurs in tropics and mountainous areas of US due to contaminated food; burrow into the bloodstream of the small intestine and go to lungs where the larvae can grow
Necator americanus
lives in soil and eats bacteria and vegetation; burrow between toes and travel to lungs
Strongyloides stercoralis autoinfection
larvae penetrate intestine and go to lung
Strongyloides stercoralis Direct cycle
pass out in feces and survive in the soil then penetrate next passerby
Strongyloides stercoralis indirect cycle
larvae pass in feces and undergo sexual reproduction where they can reinfect another human
Trichinella spiralis
found in raw pork; pts may have abd pain, diarrhea, fever, fevers and muscle aches
Trichuris trichuria
slow life cycle, commonly found in cecum and ascending colon
Enterobius vermicularis
mature in cecum and ascending colon; perianal itching
Onchocerca volvulus
Africa, Central and South America, transmitted with black flies; subcutaneous tissue that migrate into dermis; develop pruritic skin rash, intraepithelial granulomas
Wuchereria bancrofti is endemic in which areas
Pacific islands and Africa
Brugia malayi is endemic in which areas
Malay Peninsula and south east Asia
Wuchereria and Brugia sxs
fever, HA, swollen inguinal LN, elephantitis
Dracunculus medinensis
found in Asian freshwater copepods; allergic sxs like N/V, hives, breathlessness
Schistosoma
found in freshwater, remain in venous system
Clinical manifestations of schistosoma
dermatiits, Katayama fever, chronic fibrosis–itchy skin, rash, fever, hives, HA, weight loss, liver, spleen and LN enlargement, portal hypertension, etc.
