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Ascaris cross section Esophagus of an Ascaris worm. Adult: cylindrical shape, creamy white or pinkish in color; Male: average 15–30 centimetres (5.9–11.8 in); more slender than the female; Female: average 20–35 centimetres (7.9–13.8 in) The body is long, cylindrical, and fusiform (pointed at both the ends).
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 Ascaris lumbricoides worldwide. [2] People living in tropical and subtropical countries are at greater risk of infection.
Internal anatomy of a male C. elegans nematode Cross-section of female Ascaris. The large circles filled with small green circles are the uterus and eggs. The long narrow feature is the digestive tract. The smaller red and orange circles are the ovaries and oviducts.
The female is able to lay over 170,000 eggs in a day, and 60,000,000 eggs in a year. [5] Eggs have a thick, multilayered shell for protection and the ability to adhere to any surface they touch once expelled. [3] Eggs are expelled in feces, which are then consumed by a horse while eating contaminated grass or drinking contaminated water.
Ascaris suum, also known as the large roundworm of pig, is a parasitic nematode that causes ascariasis in pigs.While roundworms in pigs and humans are today considered as two species (A. suum and A. lumbricoides) with different hosts, cross-infection between humans and pigs is possible; some researchers have thus argued they are the same species. [1]
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 ...
Police in Thailand have detained the British husband of Lamduan Armitage, the Thai woman whose body was found in the Yorkshire Dales more than 20 years ago. Walkers discovered her half-naked body ...
The copula happens through the coaptation of the male and female genital orifices. [7] The female has a cylindrical body, longer and thinner than the male's (1.2 to 1.6 cm long by 0.016 cm wide). It has the general appearance of a roundworm. The female parasite is darker, and it looks gray.