Osteomyelitis of the sacrum and sepsis of the hip complicating pelvic actinomycosis.

A twenty-six year old female using an intrauterine contraceptive device developed a severe intrapelvic infection which spread to the sacrum and the soft tissue of the buttocks. Several organisms were cultured as part of a mixed infection. In spite of aggressive surgical debridement and antibiotic therapy, the infection spread to the left hip. Cultures of the excised sacrum revealed Actinomyces israelii.