Abstract：
:This work reports the survival (challenge tests) of foodborne pathogen species (Escherichia coli, Staphylococcus aureus, Listeria monocytogenes, and Salmonella enterica) in Aloreña de Málaga table olive brines. The inhibitions were fit using a log-linear model with tail implemented in GInaFIT excel software. The olive brine had a considerable inhibitory effect on the pathogens. The residual (final) populations (Fp) after 24 h was below detection limit (<1.30 log10 cfu/mL) for all species assayed. The maximum death rate (kmax) was 9.98, 51.37, 38.35 and 53.01 h(-1), while the time for 4 log10 reductions (4Dr) was 0.96, 0.36, 0.36 and 0.24 h for E. coli, S. aureus, L. monocytogenes and S. enterica, respectively. Brine dilutions increased Fp and 4Dr, while decreased kmax. A cluster analysis showed that E. coli had an overall quite different behaviour being the most resistant species, but the others bacteria behaved similarly, especially S. aureus and S. enterica. Partial Least Squares regression showed that the most influential phenols on microbial survival were EDA (dialdehydic form of decarboxymethyl elenolic acid), HyEDA (EDA linked to hydroxytyrosol), hydroxytyrosol 4-glucoside, tyrosol, and oleoside 11-methyl ester. Results confirm the adverse habitats of table olives for foodborne pathogenic microorganisms.
journal_name
Food Microbioljournal_title
Food microbiologyauthors
Medina E,Romero-Gil V,Garrido-Fernández A,Arroyo-López FNdoi
10.1016/j.fm.2016.05.017subject
Has Abstractpub_date
2016-10-01 00:00:00pages
104-11eissn
0740-0020issn
1095-9998pii
S0740-0020(16)30124-1journal_volume
59pub_type
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