How can roundworms cause chest problems?

The larvae (which hatch out of the eggs in the gut) can causes respiratory symptoms and signs during the time that they are migrating through the lungs. Children with roundworm larvae in the lungs present with a dry cough or wheeze.

A high eosinophil count in the peripheral blood (10% or more) is typical. Chest X-ray may show a pneumonitis.

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