Title
Effects of essential oils on escherichia coli inactivation in cheese as described by meta-regression modelling
Date Issued
01 January 2020
Access level
open access
Resource Type
journal article
Author(s)
Silva B.N.
Cadavez V.
Teixeira J.A.
Instituto Politécnico de Braganza
Publisher(s)
MDPI Multidisciplinary Digital Publishing Institute
Abstract
The growing intention to replace chemical food preservatives with plant-based antimicrobials that pose lower risks to human health has produced numerous studies describing the bactericidal properties of biopreservatives such as essential oils (EOs) in a variety of products, including cheese. This study aimed to perform a meta-analysis of literature data that could summarize the inactivation of Escherichia coli in cheese achieved by added EOs; and compare its inhibitory effectiveness by application method, antimicrobial concentration, and specific antimicrobials. After a systematic review, 362 observations on log reduction data and study characteristics were extracted from 16 studies. The meta-regression model suggested that pathogenic E. coli is more resistant to EO action than the non-pathogenic type (p < 0.0001), although in both cases the higher the EO dose, the greater the mean log reduction achieved (p < 0.0001). It also showed that, among the factual application methods, EOs’ incorporation in films render a steadier inactivation (p < 0.0001) than when directly applied to milk or smeared on cheese surface. Lemon balm, sage, shallot, and anise EOs showed the best inhibitory outcomes against the pathogen. The model also revealed the inadequacy of inoculating antimicrobials in cheese purposely grated for performing challenge studies, as this non-realistic application overestimates (p < 0.0001) the inhibitory effects of EOs.
Volume
9
Issue
6
Language
English
OCDE Knowledge area
Biología celular, Microbiología Alimentos y bebidas
Scopus EID
2-s2.0-85090884612
Source
Foods
ISSN of the container
23048158
Source funding
Fundação para a Ciência e a Tecnologia
Sponsor(s)
Funding: The authors are grateful to EU PRIMA programme and the Portuguese Foundation for Science and Technology (FCT) for funding the ArtiSaneFood project (PRIMA/0001/2018). This study was supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit and BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte. Acknowledgments: The authors are grateful to FCT for financial support through national funds FCT/MCTES to CIMO (UIDB/00690/2020). Nunes Silva wishes to acknowledge the financial support provided by FCT through the PhD grant SFRH/BD/137801/2018. Gonzales-Barron acknowledges the national funding by FCT, P.I., through the Institutional Scientific Employment Programme contract.
Sources of information: Directorio de Producción Científica Scopus