Polymicrobial brain abscess in a patient infected with human immunodeficiency virus.

Although intracranial mass lesions that occur as a result of infection have commonly been reported in patients infected with human immunodeficiency virus, polymicrobial pyogenic brain abscess has not been described in this setting. We report the first case of a patient with a polymicrobial brain abscess involving Streptococcus bovis, Fusobacterium necrophorum, Peptostreptococcus, and group G Streptococcus, and we review the relevant world literature.