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Prophylaxis against Staphylococcus epidermidies vascular graft infection with rifampicin-soaked, gelatin-sealed Dacron

Sardelic, F. (Department of Surgery, University of Sydney and Westmead Hospital, Westmead, NSW 2145, Australia ); Ao, P.Y. (Department of Surgery, University of Sydney and Westmead Hospital, Westmead, NSW 2145, Australia ); Taylor, D.A. (Department of Surgery, University of Sydney and Westmead Hospital, Westmead, NSW 2145, Australia ); Fletcher, J.P. (Correspondence to: Dr J. P. Fletcher. );
  • 초록  

    Abstract An animal model was used to assess the efficacy of rifampicin-impregnated, gelatin-sealed Dacron in the prevention of vascular graft infections caused by Staphylococcus epidermidis . Under a general anaesthetic an interposition graft was placed into sheep carotid artery. On completion of the operation 1 ml of normal saline containing 10 8 colony forming units (cfu) of a slime-producing S. epidermidis was inoculated directly onto the graft. After 3 weeks the graft was harvested. Swabs were taken of perigraft tissues, and of external and internal aspects of the graft. A 3–5-mm segment of the graft was incubated in broth medium and a second segment was ground for 5 min and incubated in broth medium. The presence of abscess formation and anastomotic disruption was assessed. Ten sheep received a gelatin-sealed Dacron graft (control), while nine received the same graft impregnated with rifampicin at a concentration of 1.2 mg/ml (treated). Eight of 10 control grafts were infected, with 30 of 50 possible cultures positive, compared with four of nine treatment grafts infected ( P = 0.13) and 13 of 45 cultures positive ( P = 0.004). The control group had four abscesses and two anastomotic disruptions; the treatment group had no abscesses ( P = 0.05) or anastomotic disruptions ( P = 0.26). Other organisms were isolated from nine of the 12 infected grafts, most commonly Staphylococcus aureus . There was no development of resistance to rifampicin. Rifampicin-impregnated, gelatin-sealed Dacron is successful at reducing the incidence of S . epidermidis vascular graft infection.


  • 주제어

    Staphylococcus epidermidis .   graft infection .   animal model .   rifampicin .   gelatin-sealed Dacron.  

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