Ascariasis is an infection of the small intestine caused by the roundworm Ascaris lumbricoides. It is transmitted through the fecal-oral route with the ingestion of eggs. Larvae then develop within the gastrointestinal tract and can migrate through the blood into the lungs. They travel upward and out of the trachea and are swallowed and produce eggs when they reach their adult form, which are passed through the feces. This can lead to respiratory symptoms including cough and the development of pneumonia, known as Loeffler’s syndrome. These nematodes can also migrate to other organs and can cause obstruction, malnutrition, abscess, pancreatitis, or appendicitis. Eosinophilia is often seen in this condition. Albendazole 400mg as a single dose is the first line treatment.