Ascaris lumbricoides is the largest known round worm in the human intestine, while Ascaris suum is an internal parasitic nematode of pigs. It is popularly known as the solitary earthworm and has a length that goes from 15 cm and can reach 50 cm. Its transmission and contagion is known as ascariasis, caused by Ascaris lumbricoides, which has a worldwide distribution, but is more frequent in underdeveloped countries. In the case of the presence of the adult parasite in the intestinal cavity can cause anemia, paleness, weight loss, diarrheal syndrome and general malaise. The state of malnutrition especially affects children, which delays their development.