الفهرس 
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Abstract
The present study was conducted on 75 patients with post-operative abdominal wound sepsis. They were selected from Gastro-Enterology center, General surgery and obstetric and Gynaecology Departments, Majnsura University Hopital, Faculty of Medicine, Mansura university during the peroid from April 1994 to October 1994. It was found that, 53.3% out of 75 yielded anaerobic growth. 23 (65.7 %) out of 35 cases of urgent operations and 17 (42.5 %) out of 40 cases of elective operations yielded anaerobic growth. The anaerbic isolates contained. 75% Bacteroides species (57.5%) Bacteroides fragilis subspecies fragilis, 10% Bactroides ureolyticus subspecies asaccharolyticus and 7.5% Bacteroides melaninogenicus subspecies melaninogenicus), 20% peptostreptococcus species and 5% Fusobacterium nuleatum. All anaerobic isolates were sensitive to metronidazole (80 ug.) and cefotaxime (30 u.g.). 95 %, 50% and 40% of isolates were sensitive to clindamycin (2/-lg.), erythromycin (15 ug.) and pencillin G respectively. It was found that, short chain fatty acids were detected by G.L.C analysis in all specimens yielded anaerobic growth. In addition 4 ( 5.3%) out of 75 specimens revrealed short chain fatty acids but their cultures yielded no anaerobic growth.