[A case report of streptococcus oralis meningitis after dental manipulation].

A 75-year-old man was admitted to our hospital because of high fever and disturbance of consciousness 4 days after dental treatment including scaling, irrigation, and oral antibiotic for dental caries without gingivitis. A lumber puncture revealed cloudy cerebrospinal fluid (CSF): it contained 984 leukocytes/mm3, 680 mg/dl of protein, 5 mg/dl of glucose (blood sugar 233 mg/dl), and Streptococcus oralis, one of common microorganisms on the gingival, was isolated from the CSF. He was successfully treated with intravenous antibiotics. The authors believe this patient's meningitis developed as a result of bacteremia after the dental scaling in the present case.