A 10-month-old male Welsh Corgi with a history of acute blindness underwent
neuro-ophthalmological testing and magnetic resonance imaging (MRI). Vision testing
revealed complete visual deficits but the electroretinograph and pupillary light reflex
were normal in both eyes. The motor and sensory functions of the eyelids and eyes were
also normal. The MRI revealed compression of the optic chiasm caused by severe
ventriculomegaly in the lateral and third ventricles. Such lesions are associated with
inflammatory stenotic lesions in the mesencephalic aqueduct. Moderate neutrophilic
pleocytosis was observed during cerebrospinal fluid analysis and Acinetobacter
lwoffii was isolated, leading to a diagnosis of
Acinetobacter-positive obstructive hydrocephalus. This is the first
reported case of culture-proven Acinetobacter-associated postencephalitic
hydrocephalus with acute blindness in a dog.
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