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1 Morphology. 2 Defense mechanism. 3 History. 4 See also. 5 References. ... Ascaris is a nematode genus of parasitic worms known as the "small intestinal roundworms". [1]
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.
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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]
Nematodes that commonly parasitise humans include ascarids (Ascaris), filarias, hookworms, pinworms (Enterobius), and whipworms (Trichuris trichiura). The species Trichinella spiralis, commonly known as the trichina worm, occurs in rats, pigs, bears, and humans, and is responsible for the disease trichinosis.
Ascaris trichiura Linnaeus, 1771 Trichuris trichiura , Trichocephalus trichiuris or whipworm , is a parasitic roundworm (a type of helminth ) that causes trichuriasis (a type of helminthiasis which is one of the neglected tropical diseases ) when it infects a human large intestine .
Ascaridia galli is a parasitic roundworm belonging to the phylum Nematoda.Nematodes of the genus Ascaridia are essentially intestinal parasites of birds. [1] A. galli is the most prevalent and pathogenic species, especially in domestic fowl, Gallus domesticus.
the middle layers consist of chitinous material and serve to give structure and mechanical resistance to the eggs, and; the inner layer is composed of lipids and proteins and is useful to protect eggs from desiccation, strong acid and bases, oxidants and reductive agents as well as detergent and proteolytic compounds. [18] [19] [20] [21]