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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Listeria spp. E Listeria monocytogenes NA PRODUÇÃO DE SALSICHAS TIPO HOT DOG E HÁBITOS DE CONSUMO / Listeria spp. e L. monocytogenes in the hot dog frankfurters production and consuption practices

CESAR, Alessandra Paro Rodrigues 12 December 2008 (has links)
Made available in DSpace on 2014-07-29T15:07:47Z (GMT). No. of bitstreams: 1 Dissertacao_Alessandra_Cesar.pdf: 697265 bytes, checksum: 10184ff73bda2eae43f740e932f05ea9 (MD5) Previous issue date: 2008-12-12 / Listeria monocytogenes is a gram-positive bacterium, anaerobic facultative, that grows under refrigerator temperature and it can cause listeriosis in human and animals. It is widely distributed in the environment and it has been isolated from food of animal and vegetal origin that was associated to outbreaks of high lethality in many coutries. Thus, this bacterium represents an important pathogen to the public health. Ready-to-eat products, like cooked stuffed food, within them, frankfurters are associated to human listeriosis in many countries. Taking into consideration the importance of the subject and the need of data about it, the occurrence of Listeria spp. and L. monocytogenes in industrial plants, in meat raw materials, in slurry and frankfurters was investigated. Theses samples were harvest in this two production plants with FIS; in one of them GMP, HACCP and SOP were implemented. The results of the microbiological analysis were submitted to the program @Risk to obtain the danger analysis; the mean values results showed that 7 to 9% of the frankfurters in the market may have L. monocytogenes. After serological typification, performed by Oswaldo Cruz Institute, 88 strains of L. monocytogenes were obtained from 106 samples; among them, 76 were harvest in the industrial plants that participate in the experiment, during a day shift production and 30 were harvest in the market. In serological typification, 95% of these strains were classified as serotypes 4b, 1/2a and 1/2b. Impressions about the behavior of the population that consumes frankfurters in the matters of storage proceedings and the pattern of consumption were obtained by the application of 500 questionnaires at random. The results of these questionnaires showed that the presence of the pathogenic serotypes of L. monocytogenes in meat raw materials, as well in frankfurters commercialized by heaps, and purchased like this by about 75% of the consumers interviewed, may represent a danger to the susceptible population, especially when considering the fact of 40% of the consumers said that they eat the frankfurters directly from the package, without cooking them. Besides the consumption practices, as unknown risk factors of the presence of L. monocytogenes found in frankfurters consumed in the country, we also have lack of epidemiological data, absence of patterns as well the deficient information given to the consumer associated to the incipient relation between federal regulatory agencies and the people / Listeria monocytogenes é uma bactéria Gram-positiva, anaeróbia facultativa, que se multiplica sob temperatura de refrigeração e pode causar listeriose em humanos e outros animais. Amplamente distribuída no ambiente, tem sido isolada de alimentos de origem animal e vegetal associados a surtos de elevada letalidade em diversos países, representando, portanto um patógeno importante para a saúde pública. Produtos prontos para consumo, como embutidos cozidos, entre os quais as salsichas, estão associadas à listeriose humana em alguns países. Considerando a relevância do tema e a necessidade de dados, analisou-se a ocorrência de Listeria spp. e L. monocytogenes no ambiente industrial, nas matérias-primas cárneas, emulsões e em salsichas produzidas nesses dois estabelecimentos com SIF, sendo que em um deles as ferramentas de autocontrole estavam implantadas. Os resultados das análises microbiológicas submetidos a análise de perigos, utilizando o programa @Risk, apresenta valores médios de que 7 a 9% das salsichas destinadas ao consumo possam conter L. monocytogenes. Na sorotipificação, realizada no Instituto Oswaldo Cruz, obteve-se 88 isolados de L. monocytogenes a partir de 106 amostras, sendo 76 colhidas durante um turno de produção diurno nas indústrias que participaram do experimento e 30 no varejo, sendo 95% dos sorotipos patogênicos 4b, 1/2a e 1/2b. Noções acerca do comportamento da população consumidora de salsichas quanto aos procedimentos de estocagem e as formas de consumo praticadas foram obtidas por meio da aplicação de 500 questionários de forma aleatória, demonstrando que a presença de sorotipos patogênicos de L. monocytogenes nas matérias-primas cárneas, bem como em salsichas comercializadas a granel, adquiridas nessa apresentação por cerca de 75% dos entrevistados, oferece riscos à população susceptível, especialmente relacionando-se aos fatos de que cerca de 40% dos consumidores admitem consumir salsichas diretamente da embalagem, sem antes submetê-las ao calor. Além das práticas de consumo, como fatores do risco desconhecido da presença de L. monocytogenes em salsichas consumidas no país, ressalta-se a escassez de dados epidemiológicos, a ausência de padrãos, bem como a falta de informação ao consumidor, associada a relação incipiente entre órgãos regulamentadores e cidadãos

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