#nematode

• Hookworm — A parasitic nematode worm of the genus Ancylostoma, small in size, with a dorsally curved anterior end and a well-developed buccal capsule equipped with chitinous hooks or teeth. Attaching itself to the mucosa of the duodenum or small intestine in humans and certain animals, this hematophagous organism causes tissue lesions, local microscopic hemorrhages, and severe states of anemia.
• Female hookworm — Feminine singular form often used to designate a female hookworm (which is distinguished by its larger size compared to the male and a highly productive reproductive system) or, contextually, a vernacular variant for the parasitic species Ancylostoma duodenale.
• Roundworm — A parasitic nematode worm from the Ascarididae family, featuring a cylindrical, unsegmented body with tapered ends, which lives as an adult in the small intestine of humans or various animals; a roundworm. In an adjectival sense, it refers to elements, symptoms, or biological structures belonging to these parasites, caused by them, or displaying similar morphological characteristics.
• Ascaris — A genus of large parasitic cylindrical nematode worms in the Ascarididae family, which inhabit the small intestine of humans and other mammals during their adult stage. The typical and most well-known species is Ascaris lumbricoides, the etiological agent of ascariasis, a parasitic organism structurally adapted to the enteric environment, capable of causing severe digestive, respiratory, and nutritional disorders in the absence of proper treatment.