usually asymptomatic
symptoms can include abdominal pain, bloating, nausea, vomiting, anorexia, intermittent diarrhoea.
If significant larval load in lung - pneumonitis and eosinophilia can be seen (Loeffler syndrome). Symptoms include wheezing, dyspnea, cough, hemoptysis, and fever.
In superinfection, adult worms can migrate to tubular structures like the biliary and pancreatic system causing cholecystitis, cholangitis, pancreatitis, small bowel obstruction, volvulus, appendicitis, and intussusception.
Children are more susceptible to complications than adults.