Polymicrobial anaerobic meningitis caused by Bacteroides fragilis, Bacteroides thetaiotaomicron, Fusobacterium necrophorum and Slackia exigua in a patient with mastoiditis following otitis media.

We have reported a case of mastoiditis which progressed to meningitis in a 16-year old male patient. CSF (cerebrospinal fluid) anaerobic culture revealed four species of isolated anaerobic bacteria. This is the first case in the literature in which a patient survived childhood polymicrobial anaerobic meningitis diagnosed by MALDI-TOF MS (Matrix Assisted Laser Desorption Ionization - Time of Flight Mass Spectrometry).