Influence of carbon dioxide on growth and antibiotic susceptibility of coagulase-negative staphylococci cultured in human peritoneal dialysate.

Journal of Clinical Microbiology
M H WilcoxP Williams

Abstract

Used peritoneal dialysis fluid was collected from patients undergoing continuous ambulatory peritoneal dialysis, and its pH and composition were assessed after incubation in either air or air with 5% CO2. Precipitation of calcium, magnesium, phosphate, and proteins occurred in the dialysis fluid incubated in air at 37 degrees C and was associated with a mean pH increase of 1.23 U. Incubation of dialysis fluid in air with 5% CO2 prevented precipitation and maintained pCO2 and pH levels at those found physiologically. Coagulase-negative staphylococcal strains isolated from patients with peritonitis tended to grow less well in dialysis fluid incubated in air than in dialysis fluid incubated in the carbon dioxide-enriched atmosphere. MICs of cefuroxime, ciprofloxacin, and vancomycin for seven strains of coagulase-negative staphylococci in dialysis fluid were markedly affected by atmosphere type (16 of 21 MICs). Of these 16 atmosphere-dependent MICs, 14 were at least fourfold higher in air than in air with 5% CO2.

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Citations

Jul 6, 2004·The Journal of Pharmacy and Pharmacology·G W HanlonW A Al-Rustamani
Apr 1, 1993·FEMS Microbiology Reviews·M HussainP J White
Apr 24, 2004·Antimicrobial Agents and Chemotherapy·Christine StrijackSheryl A Zelenitsky
Jul 29, 2008·The Journal of Antimicrobial Chemotherapy·Robert SauermannMarkus Zeitlinger
Sep 4, 2013·Biofouling·Margarida MartinsRosário Oliveira

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