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Evaluation of a bacteriocin-producing strain of pediococcus acidilactici as a b...

This study was conducted to evaluate the ability of Pediococcus acidilactici HA-6111-2, a PA-1 bacteriocinproducing lactic acid bacterium (LAB), isolated from ‘‘Alheira” to inhibit a cocktail of Listeria innocua strains during production and shelf-life of these products. The bacteriocinogenic culture reduced the Listeria population below the detection limit (1.5log CFU/g) and had no effect on the growth of the ...

Foci of Contamination of L. monocytogenes in Cheese Plants of Different Sizes a...

Incidence of Listeria spp. in domestic refrigerators in Portugal

The main objectives of this study were to determine the incidence of Listeria spp. in Portuguese domestic refrigerators and to evaluate some of the hygienic practices in the domestic environment that might contribute to the persistence of the organisms. It was found that L. monocytogenes was present in 3 domestic refrigerators of the 86 investigated. L. grayi and L. innocua were also isolated from 4 and 1 refri...

Incidence of Listeria monocytogenes in different food products commercialized i...

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. monocy...

Isolation and characterization of Listeria monocytogenes from a bakery producti...

Projecto financiado pela Fundação Calouste Gulbenkian

Comparison of milk from two different cow breeds Barrosã and Frísia

Milk from two different cow breeds, Barrosã and Frísia, was studied. Within the same breed five and four milk samples were taken respectively for chemical and microbiological analysis. The following chemical parameters were analysed in triplicate: Total Fat, Fatty Acids Identification and Quantification, Protein, Casein, Albumin, Non-protein Nitrogen, Vitamin A, Vitamin D, Phosphorus, Potassium, Sodium, Iron, M...

Food Safety in the domestic environment: incidence of Listeria monocytogenes in...

Comparison of Oxford Agar, PALCAM and Listeria monocytogenes Blood Agar for the...

This work had as the main objective a comparison between Listeria monocytogenes Blood Agar (LMBA) and the conventional selective agar media, Oxford and PALCAM, relative to its efficacy in the detection of L. monocytogenes in naturally contaminated food and environmental samples. 173 environmental samples and 272 samples of foods were analysed. A higher sensitivity for detection of L. monocytogenes was verified ...

Pesquisa de Salmonella spp em produtos cárneos fumados e de salsicharia

Pesquisa de Listeria monocytogenes em produtos cárneos fumados e de salsicharia