Hartmannellosis in a Bull

Abstract

A case of Hartmannella sp. (Acanthamoeba) infection in a 1 1/2-year-old Holstein bull is reported. The disease was manifested by multifocal necrohemorrhagic nodules throughout the lung. Diagnosis was made on a morphologic basis by observing typical organisms within these nodules. The suggested mode of entry of the organism was via inhalation of the organisms or by direct extension from an inapparent nasal infection.