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Bilateral chorioretinitis, centripetal optic neuritis, and encephalitis in a llama
M E Paulsen1, S Young, J A Smith
1Department of Clinical Sciences, Veterinary Teaching Hospital, Colorado State University, Fort Collins 80523.
Abstract:
Blindness characterized by dilated, unresponsive pupils and ophthalmoscopic evidence of optic nerve atrophy and retinal degeneration developed in a 5-year-old llama. Lesions were not progressive during 2 months of observation. The llama was euthanatized and necropsied. Histopathologic findings included chorioretinitis, optic neuritis, and encephalitis characterized by mononuclear perivascular infiltration. Attempts to prove an infectious cause were unsuccessful.