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Human disease caused by parasites. Predominant intestinal parasites Intestinal entry and maturation Intestinal entry, disease elsewhere Larval stage leaves the gut Skin entry, gut manifestations M ature stage enters the gut Skin entry, disease elsewhere Dissemination
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Human disease caused by parasites • Predominant intestinal parasites Intestinal entry and maturation • Intestinal entry, disease elsewhere Larval stage leaves the gut • Skin entry, gut manifestations Mature stage enters the gut • Skin entry, disease elsewhere Dissemination Failure to complete life cycle
Predominant intestinal parasites Intestinal worms: ascaris lumbricoides trichuris trichiuria taenia saginata enterobius vermicularis Intestinal protozoans giardia lamblia cryptosporidium parvum entamoeba histolytica
Human disease caused by parasites • Intestinal entry, disease elsewhere acquired toxoplasmosis hydatid disease (echinococcus) cysticercosis (taenia solium) visceral larva migrans (Toxocara canis) trichinosis (trichinella spiralis) • Skin entry, intestinal manifestations Hookworm Strongyloides Schistosoma mansoni
Human disease caused by parasites • Skin entry, localized disease Leishmaniasis Filariasis • Skin entry, disease by dissemination Malaria Trypanosomiasis Schistosomiasis