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UTYAMA, I. K. A. In vitro evaluation of antimicrobial and cytotoxicity activities of vinegar and acetic acid: perspectives for wound therapeutics Ribeirão Preto. 108p. Dissertation (masters) School of Nursing of Ribeirão Preto, University of São Paulo. One of the concerns of health professionals has been the correct use of chemical products with antimicrobial action on wound therapeutics. This issue represents a serious problem, which is made even worse due to the facts that there is a diversity of options of products, which builds insecurity in regards to which product is more appropriate, and there is an uncontrolled use that may result in the selection of resistant species. In this sense, we set the following goals for this study: perform an in vitro assessment of the antimicrobial activity of acetic acid and vinegar using the Technique of Diffusion of Well on strains of Pseudomonas aeruginosa, E. coli, and Staphylococcus aureus; determine the Minimal Inhibitory Concentration (MIC); and reveal the cytoxicity of the referred products over Artemia salina Leach. ANOVA – ONEWAY test was used for statistic analysis, followed by the multiple comparison test; with a significance level α = 5%. By the well diffusion technique, the white vinegar, red vinegar (30 and 25%), and the acetic acid at 1.0 % are more effective than the acetic acid at 0.7%, white and red vinegar at 10% (p<0,05) over the strains of Pseudomonas aeruginosa and Escherichia coli. The analyzed products did not present antimicrobial actions over Staphylococcus aureus. The Minimal Inhibitory Concentration for the acetic acid on the species was 0.25%. For white vinegar on Pseudomonas aeruginosa and Escherichia coli was 2.0%, and 3.0% on Staphylococcus aureus. All P. aeruginosa and E. coli were inhibited by red vinegar at 1.5%, and at 3.0% for Staphylococcus aureus. In regard to the MIC of the tested chemical products, no difference was found between the hospital and community Staphylococcus aureus. Acetic acid was cytotoxic in all studied concentrations, while white and red vinegar in 0.25% and 0.125% did not show any cytoxicity. Although this study was not concerned with finding a relation among the study’s data with the in vivo use, it is important to observe that such products have been largely used as antimicrobial agents for wound treatment, at concentrations often so high that human tissue might suffer damage; thus hindering the healing process. It is, therefore, essential to stimulate health professionals a critical-reflexive consciousness regarding the use of scientific evidence in a way to analyze and apply the research outcomes in favor of a quality health care.

"Avaliação da atividade antimicrobiana e citotóxica in vitro do vinagre a ácido acético: perspectiva na terapêutica de feridas"