Ascarislumbricoidesisthe"largeroundworm"ofhumans,growingtoalengthofupto35cm(14in).ItisoneofseveralspeciesofAscaris.Anestimatedone-sixthofthehumanpopulationisinfectedbyA.lumbricoidesoranotherroundworm.AhugenumberofwormsarebeingtakenoutherebysurgeryduetoobstructionoftheGIT.
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