Global ETD Search
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Showing 1 to 20 of 37 for “"innocua"”.
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The Recovery and Transfer of Aerosolized Listeria Innocua
… this work was to explore the ability of Listeria innocua (a surrogate for L. monocytogenes) to contaminate a surface after it has become aerosolized in a bioaerosol chamber and a walk-in cooler. L. innocua was nebulized into a 154 L biosafety chamber (~5 log CFU in 1 mL) at two relative humidity …
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Survival of Listeria monocytogenes, Listeria innocua, and Lactic acid bacteria species in chill brine
… survival of Listeria monocytogenes and Listeria innocua in brines stored under low temperatures up to 10 days. Three brine concentrations (0%, 7.9%, and 13.2% NaCl) were inoculated with ~7.0 log₁₀ cfu/ml of one of five cocktails (L. monocytogenes, L. innocua, lactic acid bacteria (LAB), L. …
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Effect of Simulated Storage and Distribution on Listeria innocua Growth in Non-traditional Salad Ingredients
… purpose of this study was to characterize <em>L. innocua’s,</em> a surrogate for <em>L. monocytogenes</em>, growth behavior in processed beet greens, kale, broccoli stalk, and Brussels sprouts when exposed to simulated physical and thermal abuses during storage and distribution.</p> <p>To evaluate …
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Effect of lauric acid and monolaurin on the multiplication of Listeria monocytogenes and Listeria innocua at 10°C in bi-phasic systems.
… COSHH regulations so that the whey containing L. innocua could be removed and disposed of by heating for 30 min at 121 °C.In cheeses without lauric acid or monolaurin the population of L. innocua increased from 10[3] g[-1] to 10[7] cfu g[-1] on the surface of the cheese. The counts in the …
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How did Listeria monocytogenes become pathogenic?
… six species: L. monocytogenes, L. ivanovii, L. innocua, L. seeligeri, L. welshimeri, and L. grayi; of these, L. monocytogenes and L. ivanovii are pathogenic. Pathogenicity is enabled by a 10-15Kb virulence gene cluster found in L. seeligeri, L. monocytogenes and L. ivanovii. The genetic contents …
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Molekularbiologischer Nachweis und Immunologie des P60-Proteins, sowie In-vitro-Transkription PrfA-abhängiger bzw. -unabhängiger Gene von Listeria monocytogenes
… wurde eine Immunogenitätskarte des P60 von L. innocua bzw. L. monocytogenes erstellt, P60-spezifische CD4-T-Zellinien charakterisiert und das Epitop eines dieser T-Zellklone exakt bestimmt. Transferexperimente mit diesen T-Zelllinien und Boosterinfektionen mit L. monocytogenes bzw. L. innocua …
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Comparative genomics of Listeria species isolated from the meat processing chain in South Africa
… of Listeria spp. including L. monocytogenes, L. innocua, and L. welshimeri in food and food processing environments. The work in this thesis adds to the exponentially increasing body of evidence on the pathogen surveillance application of WGS in food industries. This study is to date the largest …
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Examining cross contamination pathways for foodborne pathogens in a retail deli environment using an abiotic surrogate
… Enteritidis, Listeria monocytogenes, Listeria innocua) were inoculated on 2 by 2 stainless steel coupons alone and with GloGermTM . There was no significant difference found (p > 0.05) between the recovery of bacteria alone and the mixture for all bacteria. Finally, the use of co-inoculation …
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Incorporation of selected plant extracts into edible chitosan films and the effect on the antiviral, antibacterial and mechanical properties of the material
… the films was also investigated against Listeria innocua and Escherichia coli K12. The viral infectivity after treatments was measured by plaque assays. The 1, 1.5 and 2.5% aqueous GTE solutions significantly (p<0.05) reduced murine norovirus (MNV-1) plaques by 1.69, 2.47, and 3.26 log after 3 h …
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The presence and growth characteristics of Listeria monocytogenes in blue crab (Callinectes sapidus) meat and the effectiveness of microwave energy in a pasteurization process
… meat and its behavior in the presence of L. innocua and competing microflora were determined. An attempt was made to develop a process using microwave energy to destroy, or significantly decrease, naturally occurring levels of L. monocytogenes in crab meat. Data for the growth of L. …
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Role of Lactic Acid Bacteria as a Bio-sanitizer to Prevent Attachment of Listeria Monocytogenes on Deli Slicer Contact Surfaces, and the Influence of Listeria Innocua on the Attachment of L. Monocytogenes on Selected Materials Located in the Food-processing Environment
… the study evaluated the influence of <em> L. innocua </em> on the attachment of <em> L. monocytogenes </em> on stainless steel, and on aluminum surfaces. The hydrophobicity tests were performed according to microbial adhesion to solvent (MATS). Extracellular carbohydrates were quantified using …
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Characterization of the 16S/23S ribosomal RNA intergenic spacer regions of Listeria
… Listeria spp examined; ie., L. monocytogenes, L. innocua, L. seeligeri, L. welshimeri, and L. ivanovii. A lower degree of homology (91 to 94 %) was detected in the large rRNA IGS region (ca. 494 bp) of these species. The DNA sequence data was used to develop two sets of oligonucleotide primers for …
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EVALUATION AND MODELING OF RISK FACTORS ASSOCIATED WITH MICROBIAL CONTAMINATION IN PRODUCE PRE-HARVEST ENVIRONMENT
… and persistence of generic E. coli and L. innocua in produce field soil. The models revealed that survival of E. coli and persistence of L. innocua were predominately influenced by temperature, precipitation, and relative humidity. Further, data from a large microbial sampling study were …
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A study of oil-bearing seeds from indigenous plants
… members of the Strychnos family viz. Strychnos innocua, Strychnos dysophylla and Strychnos Scoccoloides. The oil content of the kernels of the Ximenia species and of Sclerocarva caffra Sond. has been determined, as well as the oil content of the fruit pulp and kernels of the Strychnos species. …
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Genetische Organisation und Transkription eines Virulenz-assoziierten, instabilen Chromosomenabschnitts von Listeria ivanovii
… von L. monocytogenes und der apathogenen Art L. innocua gefunden werden. Eigene experimentelle Analysen zeigten zudem, dass diese ORFs in ähnlicher Anordnung auch in den apathogenen Arten L. seeligeri und L. welshimeri vorhanden sind, was wahrscheinlich macht, dass sie nicht an der Virulenz von …
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Longitudinal study of Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes in a small and very small fresh meat processing plant environment
… in Plant 1 and 2, respectively. Listeria innocua was the predominant Listeria spp. in both plants. L. innocua allelic type AT-1 was recovered from 15% of samples collected across Plant 1, whereas in Plant 2, type AT-6 was found mostly contained in the slaughter area. L. monocytogenes was …
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Development Of Active Packaging With Antimicrobial Activity
… coli, Salmonella typhimurium, Listeria innocua and Bacillus subtilis. Inclusion of 0.5 g/100 g gallic acid also significantly improved the mechanical and physical properties of chitosan film. For the chitosan-essential oil coatings, a combination of ࣙ 0.1% CAR or ࣙ 0.2% ECIN with a …
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Caracterização fenotípica e molecular de isolados de Listeria monocytogenes obtidos em uma planta de processamento de carne bovina
… analisadas, L. monocytogenes em 23 (8.5%), L. innocua em 46 (16.9%), e L. seeligeri em 1 (0.37%). Um total de 231 isolados foi obtido e identificado como L. monocytogenes (n = 96), L. innocua (n = 129), L. seeligeri (n = 6). Entre os isolados de L. monoytogenes, sorotipo 1/2c ou 3c foi o mais …
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Desenvolvimento e avaliação de embalagem ativa incorporada com produto à base de triclosan para aplicação em carne bovina
… choleraesuis, Pseudomonas aeruginosa e Listeria innocua; IV) determinar a concentração mínima inibitória do produto à base de triclosan sobre os mesmos microrganismos e verificar a capacidade destes microrganismos de desenvolverem mecanismos de resistência, após sucessivas exposições ao produto à …
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The Effect of Thermal Processing Schedules and Unit Operations on the Quality of Blue Crab (Callinectes sapidus) Meat
… a manual hand wash for the removal of Listeria innocua, as a model for Listeria monocytogenes. It was found that a manual hand wash of 15 seconds was superior to an equal time automated wash. The microbial quality of crab meat was found to be affected by daily plant procedures, and could be …
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