Antibiotic Efficacy against Methicillin-Susceptible Staphylococcus aureus Biofilms on Synthetic and Biological Vascular Grafts
Tello-Díaz, Cristina (Universitat Autònoma de Barcelona. Departament de Cirurgia)
Muñoz, Estela (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Palau Gauthier, Marta (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Gomis Rodríguez, Javier (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Gavaldà, Joan (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Gil-Sala, Daniel (Hospital Clínic i Provincial de Barcelona)
Fernández-Hidalgo, Nuria (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Bellmunt Montoya, Sergi (Universitat Autònoma de Barcelona. Departament de Cirurgia)

Fecha:	2024
Resumen:	Background: Biofilm formation is one of the greatest challenges encountered in vascular graft infections. Our aim is to compare the efficacy of 5 antibiotics against methicillin-susceptible Staphylococcus aureus (MSSA) biofilms on the surface of 4 vascular grafts. Methods: In vitro study of 2 clinical MSSA strains (MSSA2 and MSSA6) and 4 vascular grafts (Dacron, Dacron-silver-triclosan (DST), Omniflow-II, and bovine pericardium). After a 24-hr incubation period, the graft samples were divided into 6 groups: growth control (no treatment), ciprofloxacin 4. 5 mg/L, cloxacillin 100 mg/L, dalbavancin 300 mg/L, daptomycin 140 mg/L, and linezolid 20 mg/L. Quantitative cultures were obtained and results expressed as log colony-forming units per milliliter (CFU/mL). Analysis of variance was performed to compare biofilm formation between the different groups. Results: The mean ± standard deviation MSSA2 count on the growth control Dacron graft was 10. 05 ± 0. 31 CFU/mL. Antibiotic treatment achieved a mean reduction of 45%; ciprofloxacin was the most effective antibiotic (64%). Baseline MSSA2 counts were very low on the DST (0. 50 ± 1. 03 CFU/mL) and Omniflow-II (0. 33 ± 0. 78 CFU/mL) grafts. On the bovine pericardium patch, the count was 9. 87 ± 0. 50 CFU/mL, but this was reduced by a mean of 45% after antibiotic treatment (61% for ciprofloxacin). The mean MSSA6 count on the growth control Dacron graft was 9. 63 ± 0. 53 CFU/mL. Antibiotics achieved a mean reduction of 48%, with ciprofloxacin performing best (67% reduction). The baseline MSSA6 count on the DST graft was 8. 54 ± 0. 73 CFU/mL. Antibiotics reduced biofilm formation by 72%; cloxacillin was the most effective treatment (86%). The MSSA6 count on the untreated Omniflow-II graft was 1. 17 ± 1. 52 CFU/mL. For the bovine pericardium patch, it was 8. 98 ± 0. 67 CFU/mL. The mean reduction after antibiotic treatment was 46%, with cloxacillin achieving the greatest reduction (68%). Conclusions: In this in vitro study, ciprofloxacin and cloxacillin performed best at reducing biofilms formed by clinical MSSA strains on the surface of biological and synthetic vascular grafts.
Derechos:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Biofilms ; Staphylococcus aureus ; Vascular graft ; Infections ; Antibiotics
Publicado en:	Annals of Vascular Surgery, Vol. 108 (November 2024) , p. 475-483, ISSN 1615-5947

DOI: 10.1016/j.avsg.2024.05.038

Disponible a partir de: 2025-11-30 Postprint

El registro aparece en las colecciones:
Artículos > Artículos de investigación
Artículos > Artículos publicados