#nematodes
- 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.