title: Actinomycotic pulmonary abscess in an immunosuppressed patient.
abstract: The clinical history of a patient with rheumatoid arthritis and bacteriologic findings from a pulmonary abscess occurring during prednisone therapy are presented. Direct transthoracic aspiration of the lesion yielded a pure culture of Actinomyces odontolyticus. This is believed to be the first case of a deep visceral infection with this organism, an inhabitant of the normal mouth and gums. Immunosuppression of the host probably played a role in establishment of the infection.
mesh_terms: D000196:Actinomycosis / Q000150:complications* / Q000175:diagnosis; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000188:drug therapy; D005260:Female; D006801:Humans; D007165:Immunosuppression Therapy; D008169:Lung Abscess / Q000150:complications* / Q000175:diagnosis; D008875:Middle Aged; D011241:Prednisone / Q000627:therapeutic use*
chemical_list: D011241:Prednisone