The lifespan of ascaris is about 1 year, but with repeated infections, the disease can last for years. Ascaris larvae are very dangerous. For 2 weeks, they feed only on human blood, up to 0.5 liters per day! During movement with blood, the larvae injure all organs on their way - the small intestine, intestinal veins, liver, heart, pulmonary artery, capillaries, alveoli, bronchi, larynx, pharynx, middle ear, salivary glands, nasal sinuses. In these traders, foci of inflammation and hemorrhages can form.