Actinomycosis: the disease and its treatment.

A case of pulmonary actinomycosis is described in a patient who presented with fever, weight loss, and a painful mass on his lower anterior left rib cage. Gram-stain and culture and sensitivity tests performed on the fluid drawn of the chest wall mass revealed Actinomyces israelii as the infecting organism. The patient was successfully treated with long-term penicillin therapy. A review of this rare bacterial disease is presented, emphasizing its treatment and its similarities and differences to other bacterial and fungal diseases.