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Type: Artigo
Title: Assessing the growth of escherichia coli O157:h7 and salmonella in spinach, lettuce, parsley and chard extracts at different storage temperatures
Author: Posada-Izquierdo, G.
Rosal, S. Del
Valero, A.
Zurera, G.
Sant’Ana, A. S.
Alvarenga, V. O.
Perez-Rodrıguez, F.
Abstract: The objective of this work was to study the growth potential of Escherichia coli O157:H7 and Salmonella spp. in leafy vegetable extracts at different temperature conditions. Methods and Results Cocktails of five strains of E. coli O157:H7 and of Salmonella enterica were used. Inoculated aqueous vegetable extracts were incubated at 8, 10, 16 and 20°C during 21 days. Microbial growth was monitored using Bioscreen C®. In spinach extract, results showed that for E. coli O157:H7 and Salmonella significant differences (P < 0·05) for μ abs (maximum absorbance rate) were obtained. For both pathogens, growth in chard was slightly lower. In contrast, iceberg lettuce and parsley showed the lowest values of μ abs, below 0·008 h−1. The coefficients of variance (CoV) calculated for the different replicates evidenced that at low temperature (8°C) a more variable behaviour of both pathogens is expected (CoV > 180%). Conclusions This study provides evidence that aqueous extracts from vegetable tissues can result in distinct growth niche producing different response in various types of vegetables
Subject: Escherichia coli
Country: Reino Unido
Editor: Wiley
Rights: Fechado
Identifier DOI: 10.1111/jam.13122
Date Issue: 2016
Appears in Collections:FEA - Artigos e Outros Documentos

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