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A Rat Model of Central Venous Catheter to Study Establishment of Long-Term Bacterial Biofilm and Related Acute and Chronic Infections
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A Rat Model of Central Venous Catheter to Study Establishment of Long-Term Bacterial Biofilm and Related Acute and Chronic Infections
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Journal Article
A Rat Model of Central Venous Catheter to Study Establishment of Long-Term Bacterial Biofilm and Related Acute and Chronic Infections
2012
Overview
Formation of resilient biofilms on medical devices colonized by pathogenic microorganisms is a major cause of health-care associated infection. While in vitro biofilm analyses led to promising anti-biofilm approaches, little is known about their translation to in vivo situations and on host contribution to the in vivo dynamics of infections on medical devices. Here we have developed an in vivo model of long-term bacterial biofilm infections in a pediatric totally implantable venous access port (TIVAP) surgically placed in adult rats. Using non-invasive and quantitative bioluminescence, we studied TIVAP contamination by clinically relevant pathogens, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus epidermidis, and we demonstrated that TIVAP bacterial populations display typical biofilm phenotypes. In our study, we showed that immunocompetent rats were able to control the colonization and clear the bloodstream infection except for up to 30% that suffered systemic infection and death whereas none of the immunosuppressed rats survived the infection. Besides, we mimicked some clinically relevant TIVAP associated complications such as port-pocket infection and hematogenous route of colonization. Finally, by assessing an optimized antibiotic lock therapy, we established that our in vivo model enables to assess innovative therapeutic strategies against bacterial biofilm infections.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Animals
/ Anti-Bacterial Agents - therapeutic use
/ Bacteria
/ Biofilms
/ Biofilms - growth & development
/ Biology
/ Catheterization, Central Venous - adverse effects
/ Catheters, Indwelling - adverse effects
/ Central Venous/adverse effects
/ E coli
/ Escherichia coli Infections - complications
/ Gentamicins - therapeutic use
/ Immunosuppression - adverse effects
/ Male
/ Microbiology and Parasitology
/ Pseudomonas Infections - complications
/ Rats
/ Staphylococcal Infections - complications
/ Staphylococcal Infections - drug therapy
/ Staphylococcal Infections/complications/drug therapy
/ Staphylococcus aureus infections
