Incidence of Listeria monocytogenes in different food products commercialized in Portugal

Cristina Mena, Gonçalo Almeida, Luísa Carneiro, Paula Teixeira*, Tim Hogg, Paul A. Gibbs

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Citations (Scopus)
99 Downloads

Abstract

Several types of food products on sale in Portugal, were examined for the presence of Listeria monocytogenes. Secondary enrichments, in Fraser broth, were analysed by the mini-Vidas LMO, enzyme-linked fluorescent immunoassay technique. Positive samples were confirmed by isolation on Oxford and PALCAM selective agars followed by biochemical characterization. Of 1035 samples, 72 (7.0%) were positive for L. monocytogenes, the majority being from raw products (milk, meat, fish, flour) although some heat-processed or fermented foods (ready-to-eat) were also positive. In Portugal, a predilection for fresh cheese was indicated as a potential risk for consumers.

Original languageEnglish
Pages (from-to)213-216
Number of pages4
JournalFood Microbiology
Volume21
Issue number2
DOIs
Publication statusPublished - Apr 2004

Keywords

  • Incidence in foods
  • Listeria monocytogenes

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