Listeria brain abscess in a patient with autoimmune hepatitis.

Listeria monocytogenes is an uncommon cause of brain abscesses. Immunocompromised hosts, pregnant women and patients at extremes of age are especially susceptible. We discuss the successful management of a woman with autoimmune hepatitis on prednisone and azathioprine therapy with a L. monocytogenes brain abscess. Previously thought to be a rare cause of central nervous system (CNS) infection, the incidence of CNS listeriosis has increased due to a rise in organ and bone marrow transplantation requiring immunosuppressive medications. L. monocytogenes brain abscesses are now more frequently described and are associated with high rates of concomitant bacteremia suggesting a hematogenous route of infection.