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Efficacy of Antiseptic Solutions in Treatment of Staphylococcus Aureus Infected Surgical Wounds with Patches of Vascular Graft: An Experimental Study in Rats

Vilnius University Faculty of Medicine, Vilnius, LT-03101, Lithuania
National Center of Pathology, affiliate of Vilnius University Hospital Santaros Klinikos, Vilnius, LT-08406, Lithuania
Vilnius University Hospital Santaros Klinikos, Vilnius, LT-08661, Lithuania
Author to whom correspondence should be addressed.
Medicina 2019, 55(4), 106;
Received: 3 February 2019 / Revised: 10 April 2019 / Accepted: 10 April 2019 / Published: 15 April 2019
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Background and objectives: Treatment of a prosthetic vascular graft infection (PVGI) remains a challenging problem in vascular surgery. The aim of this study was to design a novel rat model for treatment of peripheral vascular prosthesis infection caused by Staphylococcus aureus (S. aureus) and to determine the efficacy of different antiseptic solutions in suppressing or eradicating infection from the wound and the graft material itself. Materials and methods: A piece of Dacron vascular prosthesis was surgically implanted at the dorsum of 48 Wistar rats and the wounds were infected with 5 McFarland standard inoculum of S. aureus. Suppurating wounds were daily irrigated with different antiseptic solutions: octenidine dihydrochloride, povidone-iodine, chlorhexidine digluconate, and sterile saline. The antimicrobial action of antiseptics was defined according to their capability to eradicate bacteria from the graft surroundings and bacteriological examination of the graft itself. Extended studies on wound microbiology, cytology, and histopathology were performed with an additional group of 10 rats, treated with the most effective antiseptic-octenidine dihydrochloride. Results: Four-day treatment course with octenidine, povidone-iodine, and chlorhexidine resulted in 99.98% (p = 0.0005), 90.73% (p = 0.002), and 65.97% (p = 0.004) decrease in S. aureus colonies in wound washouts, respectively. The number of S. aureus colonies increased insignificantly by 19.72% (p = 0.765) in control group. Seven-day treatment course with octenidine eradicated viable bacteria from nine out of 10 wound washouts and sterilized one vascular graft. Conclusions: A reproducible rat model of PVGI with a thriving S. aureus infection was designed. It is a first PVGI animal model where different antiseptic solutions were applied as daily irrigations to treat peripheral PVGI. Seven-day treatment with octenidine eradicated bacteria from the wound washouts for 90% of rats and one vascular graft. Further studies are needed to investigate if irrigations with octenidine could properly cure vascular bed from infection to assure a successful implantation of a new synthetic vascular substitute. View Full-Text
Keywords: rat model; vascular graft infection; S. aureus; antiseptic rat model; vascular graft infection; S. aureus; antiseptic

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Stanevičiūtė, E.; Builytė, I.U.; Ridziauskas, M.; Besusparis, J.; Kirkliauskienė, A.; Zabulis, V.; Davainis, L.; Valiūnaitė, G.; Triponis, V.; Sirvydis, V. Efficacy of Antiseptic Solutions in Treatment of Staphylococcus Aureus Infected Surgical Wounds with Patches of Vascular Graft: An Experimental Study in Rats. Medicina 2019, 55, 106.

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