infectious diseases
Mixed Anaerobic Infections
Etiology of Mixed Anaerobic Infections
The principal anaerobic gram-positive cocci involved in mixed anaerobic infections are Peptococci Peptostreptococci These anaerobes are part of the normal flora of the mouth, upper respiratory tract, and large intestine. The principal anaerobic gram-negative bacilli involved in mixed anaerobic infections include Bacteroides fragilis Prevotella melaninogenica Fusobacteriumspecies TheB. fragilisgroup is part of the normal bowel flora and includes the anaerobic pathogens most frequently isolated from intra-abdominal and pelvic infections. Organisms in thePrevotellagroup andFusobacteriumspecies are part of the normal oral, vaginal, and large-bowel flora. 