EN
Prototheca species are ubiquitous, achlorophyllous unicellular algae. They have been found in water, sewage, slime flux of trees and soil and reportedly cause a rare mycosis-like systemic or local disease in a wide variety of mammals including humans, dogs, cats, pigs and cattle. In this article a case of canine heart protothecosis diagnosed histopathologicaly post mortem was described.