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Ascaris lumbricoides is a large parasitic roundworm of the genus Ascaris. It is the most common parasitic worm in humans. [ 1 ] An estimated 807 million–1.2 billion people are infected with A. lumbricoides worldwide. [ 2 ]
Ascaris lumbricoides adult worms (with measuring tape for scale) Ascaris lumbricoides adult worms Ascaris egg, incubation process: The Ascaris egg incubation process consists of placing the egg in a controlled environment, at 26 °C (79 °F) during 28 days, in acidic conditions.
Ascaris is a nematode genus of parasitic worms known as the "small intestinal roundworms". [1] One species, Ascaris lumbricoides , affects humans and causes the disease ascariasis . Another species, Ascaris suum , typically infects pigs .
It takes 2 to 3 months for one complete cycle. Adult worms can live 1 to 2 years. Collage of various helminth eggs, from left to right: Trichosomoides egg, Ascaris lumbricoides with larva hatching, sample of adult roundworms, Hymenolepis nana, Schistosoma mansoni and Toxocara canis with larva hatching
Female Ascaris lumbricoides. Ascariasis of STH is caused by the large roundworm A. lumbricoides. It is estimated to be the most widespread STH, affecting approximately 1 billion people. The victims constitute about half of the populations in tropical and subtropical areas. Most conditions are mild and often show little or no symptoms. Heavy ...
In the case of Ascaris lumbricoides (giant roundworm), which has been considered the most resistant and common helminth type, fertilized eggs deposited in soil are resistant to desiccation but are, at this stage of development, very sensitive to environmental temperatures: The reproduction of a fertilized egg within the eggshell develops at an ...
Main article: Human parasite Endoparasites Protozoan organisms Common name of organism or disease Latin name (sorted) Body parts affected Diagnostic specimen Prevalence Source/Transmission (Reservoir/Vector) Granulomatous amoebic encephalitis and Acanthamoeba keratitis (eye infection) Acanthamoeba spp. eye, brain, skin culture worldwide contact lenses cleaned with contaminated tap water ...
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