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Registros recuperados: 10 | |
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Aragon-Alegro,Lina Casale; Souza,Kátia Leani de Oliveira; Costa Sobrinho,Paulo de Souza; Landgraf,Mariza; Destro,Maria Teresa. |
Microrganismos patogênicos podem contaminar ovos em diferentes estágios do processamento. Na tentativa de reduzir problemas decorrentes dessa contaminação por microrganismos patogênicos e/ou deteriorantes, os ovos são submetidos a processos como lavagem da casca e pasteurização. Vários estudos mostraram que alguns agentes químicos utilizados nessa lavagem podem causar danos físicos ao produto, facilitando a entrada de microrganismos através da casca. O nosso objetivo foi avaliar a eficiência da lavagem dos ovos, anteriormente à quebra, na redução da contaminação de ovo integral líquido. Foram colhidas amostras de ovo integral em 3 pontos da linha de produção, provenientes de ovos lavados e não lavados. Foram feitas pesquisa de Salmonella sp e enumeração de... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ovos; Lavagem; Qualidade microbiológica. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612005000300036 |
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Bersot,Luciano dos Santos; Gillio,Cíntia; Tavolaro,Paula; Landgraf,Mariza; Franco,Bernadette Dora Gombossy de Melo; Destro,Maria Teresa. |
This study evaluated the growth of naturally occurring L. monocytogenes in sliced, vacuum-packed mortadella samples during storage at 5ºC until the expiration date. Tukey's test indicated that counts of L. monocytogenes on 0, 10, 20, 30 and 40 days of storage were significantly different (p<0.05), indicating growth during shelf life. In three trials, the mean increase was 1.72 log cycles. Vacuum packing and storage under refrigeration were not effective in controlling the growth of L. monocytogenes in sliced mortadella, indicating that good manufacturing practices and implemented HACCP programs are essential to assure safety of this product. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Listeria monocytogenes; Growth; Sliced mortadella; Vacuum-packing. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300020 |
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Chirinos,Rodolfo R.O.; Vizeu,Dirceu M.; Destro,Maria Teresa; Franco,Bernadette D.G.M.; Landgraf,Mariza. |
Escherichia coli O157:H7 causes bloody diarrhoea, haemorrhagic colitis and life-threatening complications like haemolytic uremic syndrome and thrombotic thrombocitopenic purpura. Among foods associated with outbreaks caused by this pathogen, hamburger is the most common one. The aim of this research was to determine the radiation dose to reduce the population of E. coli O157:H7 in hamburgers to non-detectable levels in order to render a safer product. Hamburgers, inoculated with Escherichia coli O157:H7, were exposed to gamma radiation (60Co) treatment, with doses ranging from 0 to 0.7 kGy. The average temperature during the process was 5.6ºC. Non-inoculated hamburgers were submitted to sensory evaluation after being exposed to irradiation doses of 0.8 kGy... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hamburger; Patties; Escherichia coli O157:H7; Food irradiation; Gamma radiation. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100011 |
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Tavolaro,Paula; Ferrati,Analí Ramazotti; Destro,Maria Teresa; Landgraf,Mariza; Franco,Bernadette Dora Gombossy de Melo. |
Enumeration of aerobic microorganisms in Brazilian pasteurized bovine milk using PetrifilmTM AC and SimplateTM TPC was shown to be influenced by the nature of autochthonous microbiota. This study was conducted to assess if the same occurs in pasteurized goat milk. Pasteurized frozen goat milk (n=62) was purchased in retail stores in São Paulo, SP, Brazil, and submitted to mesophilic aerobic counts using PetrifilmTM AC and SimplateTM TPC, comparing results with those of conventional pour-plates. Correlation indexes above 0.90 were ranked "excellent"; those between 0.80 and 0.89, "good", those from 0.79 to 0.50, "fair", and those below 0.50, "poor". Correlation indexes for PetrifilmTM AC counts were "good", but "poor" using SimplateTM TPC. Comparison of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rapid methods; Ready-to-use systems; Goat milk; PetrifilmTM AC; SimplateTM TPC. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300017 |
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Lemes-Marques,Eneida Gonçalves; Cruz,Cristina Durante; Destro,Maria Teresa. |
Considering the lack of information available in Brazil concerning listeriosis, the present study aimed to analyze phenotypic and genotypically Listeria monocytogenes clinical isolates from the Southwestern region of the State of São Paulo, Brazil. From January 1995 to May 2005, thirteen isolates of L. monocytogenes from twelve patients with listeriosis were sent to the Adolfo Lutz Institute (Campinas Regional Laboratory, São Paulo, Brazil). The antimicrobial susceptibility of the isolates was evaluated by the microdilution broth method for ampicillin, gentamicin, trimethoprim, sulfamethoxazole and vancomycin. They were also serotyped (Denka Seiken, Japan), and sub-typed by PFGE employing ApaI and AscI and the American CDC protocol. None of the isolates... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Listeria monocytogenes; Serotypes; Antibiotic resistance; Genotypic characterization; Listeriosis. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200019 |
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Froehlich,Ângela; Franco,Bernadette Dora Gombossy de Melo; Destro,Maria Teresa; Landgraf,Mariza. |
ABSTRACTEggs and their products have been implicated in food-borne disease outbreaks due to contamination with SalmonellaEnteritidis. Irradiation, as a food preservation technology, could minimize such contamination. The aim of this study was to determine the effects of irradiation in powdered egg yolk, egg white, and whole egg samples spiked with Salmonella Enteritidis. The powdered egg samples were exposed to doses of 0.5, 1.0, 1.0, 2.0, 2.5, 3.0, 3.5, or 4.0 kGy irradiation. Odors and tastes of raw and cooked non-inoculated, irradiated samples, and non-irradiated samples, were analyzed by a trained panel. A dose of 2.0 kGy resulted in slight to moderate changes in powdered egg yolk samples, compared to non-irradiated controls, while minimal differences... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Elimination; Powder food. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500506 |
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Martins,Cecília Geraldes; Behrens,Jorge Herman; Aragon-Alegro,Lina Casale; Vieira,Vanessa Santos; Costa-Sobrinho,Paulo Souza; Vizeu,Dirceu Martins; Hutzler,Beatriz; Franco,Bernadette Dora Gombossy de Melo; Destro,Maria Teresa; Landgraf,Mariza. |
This study was carried out to evaluate the shelf life of minimally processed (MP) watercress exposed to gamma radiation with doses of 1.0; 3.0; 4.0 kGy. Packaged irradiated and non-irradiated MP watercress was subject to sensory analysis. A panel consisting of 25-30 non-trained members, aged 20-55 years, was used. Sensory evaluation was carried out on days 0, 2, 5, 7, 9 and 12 after treatment with packages maintained at 7 °C. The members of the panel rated each sample for overall liking on a hybrid 10 hedonic scale (0 = extremely dislike; 10 = extremely like). Microbiological analyses were also conducted. Compared to the non-irradiated sample, 1 kGy irradiated watercress increased its shelf life by one day (16 days). Shelf lives of samples exposed to... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Watercress; Vegetable irradiation; Acceptance test. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612007000100008 |
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Registros recuperados: 10 | |
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