Infection of total hip prostheses by Peptococcus magnus: an immunofluorescence and ELISA study of two cases.

Abstract
In 2 cases of infected total hip replacements, P. magnus was isolated in pure culture from the implant when it was removed. Fluorescent antibody and ELISA [enzyme-linked immunosorbent assay] studies showed that both patients developed an antibody response to this anaerobic coccus soon after the replacement operation. The organism is a true infective agent, which was probably responsible for the failure of the arthroplasty operation.