Optimization of the Resistance of Arterial
Allografts to Infection: Comparative Study with Synthetic
Prostheses |
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Authors: | Christophe Camiade Pablo Goldschmidt Fabien Koskas Jean-Baptiste Ricco Mohamed Jarraya Jean Gerota Edouard Kieffer |
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Institution: | Service de Chirurgie Vasculaire, Centre Hospitalier Universitaire La Milétrie, 350 Avenue Jacques Coeur, 86021 Poitiers Cedex, France. |
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Abstract: | Arterial allografts can be used for in situ treatment of prosthetic graft infection. The purpose of this in vitro study was
to compare the resistance of allografts and synthetic prostheses to infection by five strains of bacteria and to study antibiotic
treatments designed to reduce allograft infection. Fresh and cryopreserved allografts were compared with synthetic prostheses
made of various biomaterials including PTFE, plain Dacron, gelatine-sealed Dacron, and gelatine-sealed, rifampicine-bonded
Dacron. Allografts were used with or without treatment using an antibiotic containing gentamycine, lincomycine, and vancomycine.
The bacterial strains tested were Escherichia coli, Staphylococcus aureus, slime-producing Staphylococcus epidermidis, non-slime-producing
Staphylococcus epidermidis, and Pseudomonas aeruginosa. Infection was evaluated by counting the number of adherent bacteria
on the allograft or synthetic material after rinsing and ultrasonication. Statistical analysis was achieved using nonparametric
Mann-Whitney tests. Results showed that allografts not treated with antibiotics were highly susceptible to bacterial infection.
Antibiotic treatment decreased infection. Application of antibiotic after thawing cryopreserved allografts led to a significant
decrease. None of the biomaterials tested provided sufficient protection against bacteria resistant to the antibiotics used. |
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