Severe nasal Prototheca cutis infection was diagnosed postmortem for an immunocompetent cat with respiratory signs. Pathologic examination and whole-genome sequencing identified this species of algae, and susceptibility testing determined antimicrobial resistance patterns. P. cutis infection should be a differential diagnosis for soft tissue infections of mammals.
Keywords: Prototheca cutis; algae; antimicrobial resistance; antimicrobial susceptibility; cat; pathology; whole-genome sequencing; zoonoses.