Aspectos higiênicos-sanitários de vegetais minimamente processados e perfil de resistência das leveduras isoladas frente ao hipoclorito de sódio e ozônio
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Data
2010-03-12
Autores
Pereira, Ana Paula Maciel [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A demanda por dietas saudáveis, a participação feminina cada vez maior no mercado de trabalho, reduzindo o tempo gasto no preparo das refeições e a praticidade cada vez mais exigida pelas redes de fast-food e restaurantes, resultaram em uma expansão no setor de vegetais minimamente processados. O objetivo do processamento mínimo é oferecer ao consumidor, frutas e hortaliças prontas para o preparo/consumo, ou seja, alimentos práticos, que economizam tempo, espaço e mão-de-obra. Além disso, devem apresentar características de produto fresco, boa aparência, qualidade nutritiva e segurança para o consumidor. Devido ao alto teor de umidade, à intensa manipulação e à falhas que podem ocorrer durante as etapas do processamento, esse produto alimentício geralmente constitui um ótimo meio para o desenvolvimento de microrganismos deteriorantes ou patogênicos. Nesse sentido, este trabalho teve por objetivo analisar os aspectos higiênico-sanitários de vegetais minimamente processados produzidos por uma microempresa localizada em São José do Rio Preto - SP, por meio do monitoramento microbiológico e aplicação do check-list, e também verificar o perfil de resistência das leveduras isoladas frente ao hipoclorito de sódio e ozônio em diferentes concentrações. Foram realizadas coletas de amostras de água, abóbora, acelga, cenoura, couve, couve-flor, milho, quiabo, repolho e vagem, nas quais foi avaliada a qualidade microbiológica por meio da determinação do Número Mais Provável (NMP) para coliformes totais e termotolerantes, contagem de aeróbios mesófilos, bolores e leveduras e pesquisa de Escherichia coli e Salmonella spp. A contagem de bactérias aeróbias mesófilas foi efetuada apenas nas amostras de água. As análises microbiológicas foram realizadas no dia do processamento dos vegetais (t0) e com 7 dias de fabricação (t7)...
The demand for healthy diets, the larger and larger feminine participation in the job market, reducing the time spent in the preparation of meals, joined to the practicality more and more demanded by the fast-food nets and restaurants, resulted in an expansion in the section of minimally processed vegetables. The minimum processing’s objective is to offer fruits and vegetables ready for preparing / consuming to the consumer, in other words, practical foods, that save time, space and labor. Besides, they must present characteristics of fresh products, good appearance, nutritious quality and safety for the consumer. Due to the high humidity tenor, to the intense manipulation and to flaws that can happen during the processing stages, this food product usually constitutes a great environment for development of deteriorative or pathogenic microorganisms. According to the presented, this work aimed to analyze the hygienic-sanitary aspects of minimally processed vegetables produced by a micro company located in São José do Rio Preto - SP, by microbiological monitoring and check list use, verifying as well as the resistance profile of yeasts isolated in front of sodium hypochlorite and ozone. Samples of water, pumpkin, beet, carrot, collard green, cauliflower, corn, okra, cabbage and green bean were collected, in which the microbiological quality was evaluated through the determination of the Most Probable Number (MPN) for total and thermotolerant coliforms, mesophilic aerobic bacteria counting, molds and yeasts and Escherichia coli and Salmonella sp. research. The mesophilic aerobic bacteria counting was made only in the samples of water. The microbiological analyses were accomplished at the day of the vegetables’ processing (t0) and after 7 days of fabrication (t7). From the molds and yeasts enumeration, 47 yeast cultures of all the existent morphological types were isolated... (Complete abstract click electronic access below)
The demand for healthy diets, the larger and larger feminine participation in the job market, reducing the time spent in the preparation of meals, joined to the practicality more and more demanded by the fast-food nets and restaurants, resulted in an expansion in the section of minimally processed vegetables. The minimum processing’s objective is to offer fruits and vegetables ready for preparing / consuming to the consumer, in other words, practical foods, that save time, space and labor. Besides, they must present characteristics of fresh products, good appearance, nutritious quality and safety for the consumer. Due to the high humidity tenor, to the intense manipulation and to flaws that can happen during the processing stages, this food product usually constitutes a great environment for development of deteriorative or pathogenic microorganisms. According to the presented, this work aimed to analyze the hygienic-sanitary aspects of minimally processed vegetables produced by a micro company located in São José do Rio Preto - SP, by microbiological monitoring and check list use, verifying as well as the resistance profile of yeasts isolated in front of sodium hypochlorite and ozone. Samples of water, pumpkin, beet, carrot, collard green, cauliflower, corn, okra, cabbage and green bean were collected, in which the microbiological quality was evaluated through the determination of the Most Probable Number (MPN) for total and thermotolerant coliforms, mesophilic aerobic bacteria counting, molds and yeasts and Escherichia coli and Salmonella sp. research. The mesophilic aerobic bacteria counting was made only in the samples of water. The microbiological analyses were accomplished at the day of the vegetables’ processing (t0) and after 7 days of fabrication (t7). From the molds and yeasts enumeration, 47 yeast cultures of all the existent morphological types were isolated... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Microbiologia industrial, Alimentos - Microbiologia, Hortaliças - Processamento - Microbiologia, Leveduras - Perfil de resistência - Microbiologia, Minimally processed vegetables, Microbiological quality, Sodium hypochlorite, Ozone
Como citar
PEREIRA, Ana Paula Maciel. Aspectos higiênicos-sanitários de vegetais minimamente processados e perfil de resistência das leveduras isoladas frente ao hipoclorito de sódio e ozônio. 2010. 89 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Biociências, Letras e Ciências Exatas, 2010.