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• W4283171415 abstract "Abstract Background Patients requiring long-term intravenous access are at risk of intraluminal catheter bloodstream infection. ‘Prophylactic’ locks aim to limit this risk but there is uncertainty regarding the most effective lock. Objectives To develop a novel technique intended to replicate clinical procedures to compare the effectiveness of various ‘prophylactic’ locks against biofilm biomass (‘biomass’) formation and biofilm viability (‘viability’) of Escherichia coli and Staphylococcus epidermidis in intravenous catheters. Methods For 10 consecutive days 106 cfu/mL E. coli NCTC 10418 and S. epidermidis ATCC 12228 were separately cultured in single lumen 9.6 French silicone tunnelled and cuffed catheters. These were flushed with 0.9% w/v sodium chloride using a push–pause technique before and after instillation of seven ‘prophylactic’ locks (water, ethanol, sodium chloride, heparinized sodium chloride, citrate, taurolidine plus citrate, and taurolidine; each in triplicate) for 6 h daily. Intraluminal ‘biomass’ and ‘viability’ were quantified using crystal violet staining and flush culture, respectively. Results The reduction of ‘biomass’ and ‘viability’ depended on both agent and species. Citrate was least effective against E. coli ‘viability’ and ‘biomass’ but most effective against S. epidermidis ‘viability’, and taurolidine was most effective against E. coli ‘biomass’ and ‘viability’ but least effective against S. epidermidis ‘viability’. ‘Biomass’ and ‘viability’ were significantly correlated in E. coli between (r = 0.997, P &lt; 0.001) and within (r = 0.754, P = 0.001) interventions, but not in S. epidermidis. Conclusions A novel technique found the effect of ‘prophylactic’ agents in reducing ‘biomass’ and ‘viability’ varied by species. The choice of agent depends on the most likely infecting organism." @default.
• W4283171415 created "2022-06-21" @default.
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• W4283171415 date "2022-06-20" @default.
• W4283171415 modified "2023-09-28" @default.
• W4283171415 title "Comparative effect of seven prophylactic locks to prevent biofilm biomass and viability in intravenous catheters" @default.
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• W4283171415 doi "https://doi.org/10.1093/jac/dkac181" @default.
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