Late onset Ommaya reservoir infection due to Staphylococcus aureus: case report and review of Ommaya Infections.

The Ommaya reservoir system has been used for the treatment of chronic central nervous system infections and intracranial tumors for more than three decades. The majority of reported Ommaya reservoir infections occur proximate to the time the device is accessed. A review of the literature reveals that late onset of reservoir infection is quite rare. We report a case of Ommaya reservoir infection due to Staphylococcus aureus that was diagnosed seven years after its insertion and usage for intracerebral non-Hodgkin's lymphoma and review the literature on the microbiology and management of Ommaya reservoir infections.