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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/2900

Title: Hygienic-sanitary quality of vegetables and evaluation of treatments for the elimination of indigenous E. coli and E. coli O157:H7 from the surface of leaves of lettuce (Lactuca sativa L.)
Other Titles: Ciência e Tecnologia de Alimentos
Authors: Santos, Ytana Oliveira
Almeida, Rogeria Comastri de Castro
Guimarães, Alaise Gil
Almeida, Paulo Fernando de
Keywords: Escherichia coli;natural household sanitizers;vegetables;irrigation water;sanitizante natural de uso doméstico;hortaliças;água de irrigação
Issue Date: Oct-2010
Publisher: Sociedade Brasileira de Ciência e Tecnologia de Alimentos
Abstract: The purpose of this study is to evaluate the hygienic-sanitary quality of vegetables and irrigation water and assess the effectiveness of lemon juice and vinegar in reducing E. coli strains inoculated on lettuce. One hundred and forty samples of vegetables and 45 samples of irrigation water were investigated for thermotolerant coliforms and Salmonella spp. In order to verify the effectiveness of natural household sanitizers in reducing E. coli in inoculated lettuce, four treatment solutions were tested: fresh lemon juice, alcohol vinegar, lemon juice-vinegar mixture, and lemon juice-vinegar-water mixture. The microbiological analysis revealed high rates of contamination by thermotolerant coliforms and identified the presence of E. coli in 32% of the tested vegetable samples and 56% of the water samples. While no significant statistical difference (p < 0, 05) was identified in the tested solutions, the treatment with a combination of lemon juice and vinegar resulted in the highest Decimal Reductions (DR) of E. coli O157: H7 while the treatment with vinegar alone was the most effective against the indigenous E. coli strain.
Description: p.1083-1089
URI: http://www.repositorio.ufba.br/ri/handle/ri/2900
ISSN: 0101-2061
Appears in Collections:Artigos Publicados em Periódicos (Nutrição)

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