946 research outputs found
Condizioni microbiche delle carcasse suine e dell’impianto di macellazione in una struttura industriale
No full text
Associazione Italiana di Ematologia ed Oncologia Pediatrica: linee guida per la profilassi ed il trattamento della sindrome da lisi tumorale
No full textAssociazione Italiana di Ematologia ed Oncoematologia Pediatrica : Linee Guida per la profilassi ed il trattamento della sindrome da lisi tumorale
No full textTreatment of childhood acute lymphoblastic leukemia after the first relapse: curative strategies.
No full textBONE MARROW TRANSPLANTATION FOR APLASTIC ANEMIA ASSOCIATED WITH DYSKERATOSIS CONGENITA
No full textA 4 1/2-year-old girl developed severe aplastic anemia in association with dyskeratosis congenita. She was treated by allogeneic bone marrow transplantation following immunosuppression which included high-dose cyclophosphamide. Her clinical course following transplantation was complicated by severe graft-versus-host disease and gastrointestinal toxicity resembling that observed in patients with Fanconi's anemia treated by marrow transplantation. Two other patients with aplastic anemia and dyskeratosis congenita have been reported to develop similar transplant complications. Children with dyskeratosis congenita may be predisposed to the same complications as children with Fanconi's anemia following bone marrow transplantation and require preparative immunosuppressive regimens that do not include high-dose alkylating agents
Influence 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.[...
Influence 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 different
food-contact surfaces with regard to different temperatures, cellular hydrophobicity
and motility.
Methods and Results: Forty-four L. monocytogenes strains from food and food
environment were tested for biofilm formation by crystal violet staining. Biofilm
levels were significantly higher on glass at 4, 12 and 22C, as compared
with polystyrene and stainless steel. At 37C, L. monocytogenes produced biofilm
at significantly higher levels on glass and stainless steel, as compared with
polystyrene. Hydrophobicity was significantly (P < 0Æ05) higher at 37C than at
4, 12 and 22C. Thirty (68Æ2%) of 44 strains tested showed swimming at 22C
and 4 (9Æ1%) of those were also motile at 12C. No correlation was observed
between swimming and biofilm production.
Conclusions: L. monocytogenes can adhere to and form biofilms on food-processing
surfaces. Biofilm formation is significantly influenced by temperature,
probably modifying cell surface hydrophobicity.
Significance and Impacts of the Study: Biofilm formation creates major problems
in the food industry because it may represent an important source of food
contamination. Our results are therefore important in finding ways to prevent
contamination because they contribute to a better understanding on how
L. monocytogenes can establish biofilms in food industry and therefore survive
in the processing environment
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