Recovery of the susceptibility of isolated bacterium achieved by giving long-established antibiotics as prophylaxis against postoperative infections

Surgery Today
Shinya KusachiJunko Sato

Abstract

To evaluate the effectiveness of operative antibiotic therapy we changed the antibiotics and examined the susceptibility of the postoperative infection. We studied 4 593 patients who underwent gastrointestinal surgery during the last 12.5 years, and examined the changes in intraoperative antibiotics, the return of bacteria isolated from infectious sites, the trends in frequency of Methicillin-resistant Staphylococcus aureus (MRSA) isolation, and changes in the antibiotic susceptibility of Pseudomonas aeruginosa and Bacterioides fragilis. We changed the antibiotics to Cefazolin (CEZ) for upper gastrointestinal tract surgery and cholecystectomy, and to Cefotiam (CTM) for colonic, liver, and pancreatic surgery. We also reduced the period of drug administration. The rate of MRSA infections decreased, the rate of P. aeruginosa infections was always under 20% and the rate of B. fragilis infections increased. After the guidelines of drug susceptibility were prepared, the minimum inhibitory concentrations (MICs) of Cefsulodin (CFS) and Piperacillin (PIPC) for P. aeruginosa and of Latamoxef (LMOX) and PIPC for B. fragilis, decreased. The use of antibiotics considered comparatively old for the prophylaxis of postoperative infection preve...Continue Reading

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