BMAP-28 improves the efficacy of vancomycin in rat models of gram-positive cocci ureteral stent infection |
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Authors: | Orlando Fiorenza Ghiselli Roberto Cirioni Oscar Minardi Daniele Tomasinsig Linda Mocchegiani Federico Silvestri Carmela Skerlavaj Barbara Riva Alessandra Muzzonigro Giovanni Saba Vittorio Scalise Giorgio Zanetti Margherita Giacometti Andrea |
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Institution: | Experimental Animal Models for Aging Units, Research Department, I.N.R.C.A.-I.R.R.C.S., Ancona, Italy. |
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Abstract: | An experimental study was performed to evaluate the efficacy of BMAP-28 alone and in combination with vancomycin in animal models ureteral stent infection due to Enterococcus faecalis and Staphylococcus aureus. Study included a control group without bacterial challenge to evaluate the sterility of surgical procedure, a challenged control group that did not receive any antibiotic prophylaxis and for each bacterial strain three challenged groups that received (a) 10 mg/kg vancomycin intraperitoneally, immediately after stent implantation, (b) BMAP-28-coated ureteral stents where 0.2-cm(2) sterile ureteral stents were incubated in 1mg/l BMAP-28 solution for 30 min immediately before implantation and (c) intraperitoneal vancomycin plus BMAP-28-coated ureteral stent at the above concentrations. Experiments were performed in duplicate. Ureteral stents were explanted at day 5 following implantation and biofilm bacteria enumerated. Our data showed that rats that received intraperitoneal vancomycin showed the lowest bacterial numbers. BMAP-28 combined with vancomycin showed efficacies higher than that of each single compound. These results highlight the potential usefulness of this combination in preventing ureteral stent-associated in gram-positive infections. |
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Keywords: | Ureteral stent Biofilm Cathelicidins Animal model Gram-positive cocci |
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