Abstract
A 74-year-old man was admitted to our hospital with pneumococcal meningitis. On the 14th day of admission, MRI and MRA revealed multiple cerebral infarctions and stenosis of cerebral arteries. On the 39th day, arterial stenosis detected by MRA was improved. It is indicated that arterial stenosis was reversible. These findings suggested that arterial stenosis and cerebral infarctions in bacterial meningitis may be caused by vasospasm. Although cerebral infarction is an important complication of bacterial meningitis, there has been no validated prevention strategy. Evaluation of cerebral arteries by MRA is important to determine an appropriate prevention method for cerebral infarction in bacterial meningitis.