Two cases of Streptococcus agalactiae meningitis in adults are reported. The first patient was a 40-year-old man who presented with acute fever, headache, stiffness of the neck and confusion. During treatment, he developed left hemiparesis from cerebral infarction and bilateral deafness. The other was an 80-year-old man who presented with acute confusion and stiffness of the neck. During treatment, he developed septic shock and generalized tonic-clonic convulsions. Diagnosis was established by latex agglutination of streptococcus B-antigen and confirmed by cerebrospinal fluid-culture later on. The first patient survived but continued to have deafness whilst the other died from septic shock.