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• W4387371735 abstract "Abstract Background In diabetic foot ulcer (DFU) patients, Pseudomonas aeruginosa ( P. aeruginosa ) infections are linked to poor wound healing. The ineffectiveness of antibiotics against these infections promotes the emergence of multidrug-resistant (MDR) strains. Bacteriophage (phage) therapy has recently gained popularity as an alternative to antibiotics. Methodology Bacterial and viral swabs and tissue were obtained from DFU infections (DFI). Bacteria were cultured followed by MALDI-TOF MS for identification. 16S rRNA long-read sequencing was used to identify the microbiota. Bacteriophages were isolated and underwent transmission electron microscopy, genomic sequencing, and stability testing. The antimicrobial activity of phages alone and in combination with ciprofloxacin against P. aeruginosa planktonic cells and biofilm grown in vitro and in ex vivo tissue was tested by measuring the optical density (OD), crystal violet assays and live/dead staining with visualisation using confocal scanning laser microscopy respectively. Results A total of 34 DFI patients were recruited from which microbiota were analysed for 25 patients. P. aeruginosa was the most prevalent pathogen cultured and was one of the top 6 most prevalent and abundant species in the microbiota analysis. Phage APTC-PA18 was isolated from DFIs, belonged to the myoviridae family and was strictly lytic. PA18 was stable between 4 and 70 degrees Celsius and between pH 3 and 11. Seven of eight P. aeruginosa clinical isolates were sensitive to APTC-PA18, and when APTC-PA18 was combined with ciprofloxacin against planktonic and biofilm of P. aeruginosa , synergistic effects were observed in vitro and in DFI tissue samples. Conclusion Phage APTC-PA18, when combined with ciprofloxacin, has the ability to kill P. aeruginosa clinical isolates both in vitro and ex vivo and is a promising treatment option for P. aeruginosa infections in DFUs." @default.
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• W4387371735 date "2023-10-04" @default.
• W4387371735 modified "2023-10-12" @default.
• W4387371735 title "Bacteriophage in combination with ciprofloxacin against Pseudomonas aeruginosa infections in diabetic foot ulcer patients" @default.
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• W4387371735 doi "https://doi.org/10.1101/2023.10.03.560795" @default.
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