Visceral larva migrans caused by Trichuris vulpis presenting as a pulmonary mass.

While the incidence ofmany parasitic diseases has decreased because of the development of anthelmintics and environmental hygiene, infection by Trichuris still occurs. This parasite exhibits some special parasitological and clinical features. Beaver et al introduced the term visceral larva migrans in the case of toxocariasis.' While the visceral larva migrans syndrome has been reported to be caused by many parasites,2 no report of this syndrome occurring as a result of Trichuris vulpis has appeared. We report a case of visceral larva migrans caused by Trichuris vulpis that was confirmed by parasite morphology and immunoelectrophoretic study.