Modeling the effect of oregano essential oil on shelf-life extension of vacuum-packed cooked sliced ham

The present study modeled the effect of oregano essential oil, as an antimicrobial agent, on the shelf-life of vacuum-packed cooked sliced ham, based on the growth of lactic acid bacteria natural microbiota under isothermal conditions. The bacterial growth in ham without oregano essential oil (contr...

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Bibliographic Details
Published in:Meat science 2018-05, Vol.139, p.113-119
Main Authors: Menezes, Natielle Maria Costa, Martins, Wiaslan Figueiredo, Longhi, Daniel Angelo, de Aragão, Gláucia Maria Falcão
Format: Article
Language:English
Subjects:
Antimicrobial
Lactic acid bacteria
Meat products
Microbial spoilage
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Summary:The present study modeled the effect of oregano essential oil, as an antimicrobial agent, on the shelf-life of vacuum-packed cooked sliced ham, based on the growth of lactic acid bacteria natural microbiota under isothermal conditions. The bacterial growth in ham without oregano essential oil (control) and with 0.4% oregano essential oil (v/w) was evaluated at five different temperatures (6, 12, 15, 20 and 25°C). Baranyi and Roberts, and modified Gompertz primary models were fitted to microbial growth curves. Square Root and Exponential secondary models were fitted to μmax parameter data. The addition of oregano essential oil increased lag phase, decreased growth rates and extended shelf-life of ham for all temperatures (at 6°C extended for, at least, 30days when compared to control). Statistical indexes showed that Baranyi and Roberts, and Exponential were the primary and secondary models, respectively, that better fit to the data. Thus, oregano essential oil showed a good antimicrobial effect and extended the ham shelf-life.
ISSN:0309-1740
1873-4138
DOI:10.1016/j.meatsci.2018.01.017