1000 resultados para Qualidade do leite


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As bebidas lácteas fermentadas são produtos formulados contendo iogurte, soro de leite, polpa de frutas, além de outras matérias-primas e aditivos permitidos. O produto final deve apresentar os micro-organismos de forma viável e abundante. Sua popularidade vem aumentando significativamente, principalmente devido aos seus benefícios nutricionais, ao menor custo do produto para o fabricante, à redução do preço final para o consumidor e por apresentar baixa viscosidade, sendo consumida como bebida suave e refrescante. Apesar do processo de fabricação ser considerado simples, utilizando-se principalmente os equipamentos disponíveis nas indústrias lácteas, estes produtos podem estar sujeitos à contaminação microbiana, quando não atendidas as condições elementares de higiene e sanidade. Tal contaminação pode ser representada por leveduras, coliformes totais, termotolerantes e bolores. Considerando os aspectos mencionados, o objetivo deste trabalho foi avaliar a qualidade microbiológica de bebidas lácteas fermentadas, com adição de polpas de frutas, comercializadas na região de São José do Rio Preto û SP, por meio das seguintes análises microbiológicas: contagem de bolores e leveduras, determinação do Número Mais Provável (NMP) de coliformes totais, temotolerantes e pesquisa de Escherichia coli e de Salmonella spp. Foi ainda efetuada a determinação do pH eletrométrico. Após a obtenção dos resultados verificou-se que 20% das amostras analisadas não atenderam ao padrão microbiológico estabelecido na legislação vigente, para coliforme termotolerentes, evidenciando positividade na pesquisa de Escherichia coli, sendo por este motivo, considerados como produtos em condições sanitárias insatisfatórias, portanto, produtos impróprios para o consumo humano.(AU)

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To determine the prevalence and intensity of orofacial pain in adults that participated in a health program at Ribeirão Preto. Methodology: The study was conducted by a self-administered questionnaire, with 19 questions in 99 people aged 18 to 66 years. The method used for data collection was the index Oral Impacton Daily Performances (OIDP), which evaluated the six months preceding the survey, pain experiences in the mouth, teeth or dentures and how these factors interfere with daily activities. Statistical analysis was performed using Epi Info version 3.4. Results: The majority of the adults who participated in this survey (52.5%) reported having an excellent or good oral health, reported having problems with their teeth (60.6%), no problems with the gums (77.8%), no bad taste in mouth (77.8%) or bad breath (77.8%). Among the participants of the study, 56.6% felt orofacial pain in the last six months and the pain were more frequently caused by cold or hot liquids (30.3%), spontaneous pain (17.2%), during the mouth opening (17.2%), pain in the face (13.1%) and ATM (13.1%). Regarding the severity rate, the highest proportion varied from mild to moderate. Conclusions: Even observing a low severity of orofacial pain, its prevalence was high, which probably has a negative effect on life quality of these people.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Hazard analysis and critical control points (HACCP) is one of the main tools currently used to ensure safety, quality and integrity of foods. So, the aim of this study was to develop and implement the HACCP program in the processing of pasteurized grade A milk Checklists were used to assess on the level of the pre requisites programs and on the sanitary classification of the dairy industry and the results were used as references for the development of the HACCP system. A "decision tree" protocol was used for the identification of the critical control points (CCP). No physical or chemical CCP were identified, whereas pasteurization and packaging were considered biological CCP For these CCP, the limits for prevention, monitoring needs, corrective actions, critical limits and verification procedures were established. The pre requisites program was essential for the establishment of the system. The implementation of the HACCP for the processing of grade A pasteurized milk was efficient to control the biological hazards and enabled the product to comply with the legislation specifications and achieve safety.

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Pós-graduação em Zootecnia - FMVZ

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Time series tendencies are an important tool for different sectors such as the scientific community, industries and environmental protection agencies who can evaluate the variability of a specific parameter in time, what is very important piece of information for establishing corrective and preventive actions. This work presents a time series model of main physical, chemical and biological parameters of the Water Quality Index (WQI) determined for different selected points of a hydrographical basin form May/2006 to Aug/2010. The statistical model Arima enabled a better understanding of the physical, chemical and biological processes that most clearly influences WQI. The Arima model allowed the assessment of the trend of several parameters used in the calculation of the WQI, showing that dissolved oxygen, turbidity, total nitrogen, and fecal E. coli were highly correlated and are the parameters that caused the index changes over time.

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Milk that is adequate for consumption must be of hygienic quality, nutritional value, and should maintain its organoleptic properties. Isolation of fecal and/or total coliforms from bovine milk is considered an indicator of hygiene and good management practices, and can be used as a quality indicator. This study aimed to isolate, identify, and assess the resistance profile of coliforms isolated from collective bulk tanks and individual milk tanks. A total of 89 milk samples were collected from collective bulk tanks and, from these, 21 Klebsiella spp., one E. coli, and 29 Enterobacter spp. were isolated, whereas 102 milk samples from individual tanks showed isolation of one Klebsiella spp. and seven Enterobacter spp. In collective bulk tanks, at least 47% of Klebsiella spp. and Enterobacter spp. were resistant to cephalexin and 30% to ampicillin. From these, at least 24% showed multidrug resistance. Among the microorganisms isolated from the individual tanks, 85% or more were resistant to ampicillin. The ESBL phenotype and the blaTEM gene were detected in strains of Klebsiella spp. isolated from both tanks. It was concluded that contamination of milk with resistant total coliforms, and especially the storage of raw milk from several small producers in the collective bulk tank increase the risk of contamination.

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O objetivo deste estudo foi avaliar a qualidade global da dieta e a adequação do consumo de cada componente da dieta de adolescentes segundo fatores demográficos, socioeconômicos e índice de massa corporal (IMC). Trata-se de estudo transversal, de base populacional, que analisou amostra representativa de 409 adolescentes, de 12 a 19 anos, utilizando o Índice de Qualidade da Dieta (IQD). Foram estimadas as prevalências de dietas classificadas no 1º quartil do IQD e as médias de escores de cada componente do IQD. Regressões múltiplas linear e de Poisson foram utilizadas nas análises. O escore médio do IQD foi de 59,7. Observou-se menor prevalência de dietas inadequadas no segmento de melhor escolaridade do chefe da família. Os estratos de menor nível socioeconômico, avaliados por renda e escolaridade, mostram um consumo inferior de verduras e legumes, frutas, leite e derivados e menor variedade da dieta e uma ingestão superior de cereais e derivados e leguminosas. Adolescentes com sobrepeso/obesidade consomem mais carnes e ovos e menos frutas comparados aos que apresentam baixo peso/eutrofia. As meninas tiveram maior ingestão de gordura total e menor ingestão de sódio. Os resultados identificam os componentes que merecem atenção nas estratégias de promoção de alimentação saudável e os segmentos mais vulneráveis à má alimentação.

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