Canine systemic protothecosis with ocular involvement: case report

Protothecosis is an uncommon disease caused by a unicellular algae primarily found in organic matter, which affects humans, cattle, dogs, and cats, with reserved to poor prognosis. The infection typically begins the gastrointestinal tract, presenting as refractory diarrhea that persists for months before progressing systemic infection, involving other organs such eyes. objective of this study was report two cases protothecosis dogs initially presented symptoms several developing visual deficits blindness. diagnosis made through histopathological examination eye testicle, aiming raise awareness among veterinary colleagues about differential patients ocular alterations associated diseases.