A human infection with Paragonimus kellicotti (lung fluke) in the United States.

A first case of Paragonimus kellicotti infection, in the United States, involving a nonimmigrant adult, is reported. Diagnosis was made on sputum cell block sections and demonstration of the characteristic operculated ova of the parasite by direct sputum smear preparation. The patient had never been outside the United States. He responded favorably to praziquantel and was asymptomatic after therapy.