77 巻 (1984) 7 号 p. 1421-1428
Aural fistula is a congenital deformity of the external ear and is more common in Orientals than in Caucasians. Infection tends to occur, and conservative treatment with antibiotics is preferable to surgical drainage. Twenty-eight cases of infected aural fistula were studied from 1981 to 1983; 15 species and 51 strains of bacteria were isolated. Nonspore forming facultative anaerobes were detected in 20 cases. The chief pathogens were Peptococcus 33.3%, Staphyloccus aureus 9.8%, and Bacteroides 7.8%.
The Intial antibiotics selected statistically (by the theory of Expected Efficacy Index, EEI) were cefmetazole and lincomycin (injection) or clindamycin (oral).