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- W2011861946 abstract "Purpose: The aim of this study was to examine the antimicrobial activity and the preservative efficacy of a novel preservative solution containing sodium hydroxymethyl glycinate (SHMG) and edetate disodium (EDTA), which is used for preservation of some commercial ophthalmic formulations. Methods:In vitro susceptibility assays were performed against several gram-positive (Staphylococcus aureus, Staphylococcus epidermidis, and Bacillus cereus) and gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria representative of the microbial flora of epithelial surfaces or colonizing the conjunctiva, as well as against Candida albicans and Aspergillus niger. Using different concentrations of SHMG alone or in combination with EDTA, the minimal inhibitory and microbicidal concentrations against these organisms were assessed. In addition, 8 brands of multidose eye drops containing 0.002% SHMG and 0.1% EDTA as preservative were tested for antimicrobial activity using the antimicrobial effectiveness test recommended by the international pharmacopoeias. Results: The minimal inhibitory and bactericidal/fungicidal concentration values of SHMG ranged from 0.0025% to 0.0125% for bacteria and from 0.125% to 0.50% for mold and yeast. Susceptibility testing demonstrated that the addition of EDTA substantially increased the SHMG activity against all bacterial and fungal strains. The preservative effectiveness test was applied to commercial eye drops. All the drop solutions met the criteria reported by the U.S. Pharmacopeia for parenteral and ophthalmic preparations. All products also satisfied the major acceptance criteria of the European Pharmacopeia with respect to the antifungal activity. With regard to the antibacterial activity, the less-stringent criteria of the European Pharmacopeia were fulfilled. Conclusions: The present study demonstrates the efficacy of a novel preservative for ophthalmic solutions (SHMG/EDTA) and its activity in protecting selected commercial artificial tears against microbial contamination." @default.
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- W2011861946 date "2013-07-01" @default.
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- W2011861946 title "Antimicrobial Activity of a New Preservative for Multiuse Ophthalmic Solutions" @default.
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- W2011861946 doi "https://doi.org/10.1089/jop.2012.0041" @default.
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