In vitro inhibition of Escherichia coli from women with urinary tract infection by cranberry hydroalcoholic extract

• Autor(a) principal: Chiavini, Mariê Scotegagna
• Data de Publicação: 2019
• Outros Autores: Gelinski, Jane Mary Lafayette Neves, Locatelli, Claudriana, Costa, Pâmela Aparecida da, Vicente, Vânia Aparecida
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Fitos
• Texto Completo: https://revistafitos.far.fiocruz.br/index.php/revista-fitos/article/view/792
• topic: UTI; proanthocyanidins; Pharmaceutical Plant; Vaccinium macrocarpon

The antimicrobial potential of cranberry hydro alcoholic extracts (CrE) was evaluated against Escherichia coli isolated from women with urinary tract infection (UTI). CrE was diluted based on the percentage of proanthocyanidins (PACs) in extract powder for final concentrations: 1.26%; 2.52%; 3.35%, 5.03% and 10.06%. CrE antimicrobial potential was evaluated by disk and well diffusion assays, and by in vitro direct action against E. coli. Antibacterial action was observed for all performed tests: minimal inhibitory concentration (MIC) was 1.26% PACs per disk diffusion assay and 2.52% of PACs by well diffusion assay. The in vitro antimicrobial direct action against E. coli resulted 3.8 Log10 cycles reduction for a concentration of 5.03% of PACs. One of the isolates showed multi resistance to antibiotics. But it was also inhibited more than any of the antibiotic tested in well diffusion assay. Only for concentrations 1.26%, 2.52% and 3.45% the inhibition of Escherichia coli by cranberry extract was dose-dependent, i.e directly proportional to the concentration of PACs. The results indicate a inhibitory action high potential of CrE. However, more in vitro and in vivo analysis can be performed to fix which the best concentration of CrE capable of causing a real beneficial effect on UTI´s.