ascaris lumbricoides life cycle roundworm infects humans via the fecal oral route |
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| navigate by keyword : adult anatomy animal ascariasis ascaris biology cycle diagram digestive disease egg health helminth human illness infection internal intestinal intestine isolated larva life lumbricoides medical medicine migration nematode organs parasite parasitic roundworm science small stage system tapeworm tract unfertilized worm |
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| Adult ascarids live in the small intestines. Females produce 200 000 eggs per day. Eggs are deposited in the lumen, passed in feces, and must embryonate for 3 weeks in the soil before becoming infectious. Ingestion of infective eggs by another human from contaminated soil results in infection. |
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