1,721,019 research outputs found
Studio dei cambiamenti strutturali delle eliche α1, α2, ed α3 implicati nella trasformazione patogena della proteina prionica
No full textConformational properties of five peptides corresponding to the entire sequence of glutathione transferase domain II
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Sensibilità agli agenti antimicrobici di ceppi di Listeria monocytogenes isolati dagli alimenti
No full textMorphological and biochemical variations of Haemophilus influenzae type b induced by pH and temperature changes
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Purification and characterisation of two GST’s forms from Rhizobium leguminosarum with a high affinity to herbicides
No full textIn vitro susceptibility of L. monocytogenes to 22 antibiotics commonly used in veterinary and human therapy
No full textBiofilm formation by environmental strains of L. monocytogenes: relationship with hydrophobicity, motility and scanning electron microscopy analisys
No full textInfluence of temperature on biofilm formation by Listeria monocytogenes on various food-contact surfaces, relationship with motility and cell surface hydrophobicity
No full textAims: To assess the ability of Listeria monocytogenes to form biofilm on differentfood-contact surfaces with regard to different temperatures, cellular hydrophobicityand motility.Methods and Results: Forty-four L. monocytogenes strains from food and foodenvironment were tested for biofilm formation by crystal violet staining. Biofilmlevels were significantly higher on glass at 4, 12 and 22C, as comparedwith polystyrene and stainless steel. At 37C, L. monocytogenes produced biofilmat significantly higher levels on glass and stainless steel, as compared withpolystyrene. Hydrophobicity was significantly (P < 0Æ05) higher at 37C than at4, 12 and 22C. Thirty (68Æ2%) of 44 strains tested showed swimming at 22Cand 4 (9Æ1%) of those were also motile at 12C. No correlation was observedbetween swimming and biofilm production.Conclusions: L. monocytogenes can adhere to and form biofilms on food-processingsurfaces. Biofilm formation is significantly influenced by temperature,probably modifying cell surface hydrophobicity.Significance and Impacts of the Study: Biofilm formation creates major problemsin the food industry because it may represent an important source of foodcontamination. Our results are therefore important in finding ways to preventcontamination because they contribute to a better understanding on howL. monocytogenes can establish biofilms in food industry and therefore survivein the processing environment.[...
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