Algal Meningoencephalitis due to Prototheca spp. in a Dog

Figure 4

1000x brain. A detached fragmented inflammatory focus of scattered histiocytes and few lymphocytes with extracellular, refractile, and round to oval thick-walled algal organism (arrow) which is 10–15 μm in diameter and composed of 2 to 3 wedge-shaped endospores is demonstrated. Hematoxylin and eosin stain: 1000x.