Characterization of the spoilage lactic acid bacteria in "sliced vacuum-packed cooked ham".

The lactic acid bacteria are involved with food fermentation and in such cases with food spoilage. Considering the need to reduce the lactic acid bacteria growth in meat products, the aim of this work was to enumerated and investigated the lactic acid bacteria present on sliced vacuum-packed cooked ham stored at 4 °C and 8 °C for 45 days by phenotypic and molecular techniques. The quantification showed that the lactic acid bacteria were present from the first day with mean count of 1.98 log cfu/g for the four batches analyzed. The lactic acid bacteria grew rapidly on the samples, and plate counts around 7.59 log cfu/g and 8.25 log cfu/g were detected after 45 days of storage at 4 °C and 8 °C, respectively; storage temperatures studied showed significant influence on the microorganism in study growth. The predominant lactic acid bacteria associated with the spoilage samples at one day of storage includes Lactobacillus sp., the phenotypic overlap Leuconostoc / Weissella sp. and Enterococcus sp. At 45 days of storage at 4 and 8 °C the mainly specie was Lactobacillus curvatus , following by Lactobacillus sakei and Leuconostoc mesentereoides ; the Enterococcus sp. was not present in the samples.

Characterization of the spoilage lactic acid bacteria in “sliced vacuum-packed cooked ham”

The lactic acid bacteria are involved with food fermentation and in such cases with food spoilage. Considering the need to reduce the lactic acid bacteria growth in meat products, the aim of this work was to enumerated and investigated the lactic acid bacteria present on sliced vacuum-packed cooked ham stored at 4 °C and 8 °C for 45 days by phenotypic and molecular techniques. The quantification showed that the lactic acid bacteria were present from the first day with mean count of 1.98 log cfu/g for the four batches analyzed. The lactic acid bacteria grew rapidly on the samples, and plate counts around 7.59 log cfu/g and 8.25 log cfu/g were detected after 45 days of storage at 4 °C and 8 °C, respectively; storage temperatures studied showed significant influence on the microorganism in study growth. The predominant lactic acid bacteria associated with the spoilage samples at one day of storage includes Lactobacillus sp., the phenotypic overlap Leuconostoc/Weissella sp. and Enterococcus sp. At 45 days of storage at 4 and 8 °C the mainly specie was Lactobacillus curvatus, following by Lactobacillus sakei and Leuconostoc mesentereoides; the Enterococcus sp. was not present in the samples.

Avaliação da qualidade microbiológica, físico-química e sensorial de bebidas lácteas fermentadas, sabor morango, comercializadas na cidade de Medianeira, PR / Evaluation of microbiological, physicochemical and sensory properties of fermented milk drinks, strawberry flavor, commercialized in the city of Medianeira, PR

Foram coletadas seis marcas de bebidas lácteas fermentadas, sabor morango, em triplicata, perfazendo um total de dezoito amostras, comercializadas nos principais supermercados da cidade de Medianeira – PR, para posterior realização de análises microbiológicas e físico-químicas, a fim de avaliar se estavam de acordo com os parâmetros da legislação vigente e realização de análise sensorial utilizando Escala Hedônica de 07 pontos, para verificar a aceitabilidade do produto por parte dos consumidores. Em relação aos resultados obtidos, todas as amostras encontraram-se dentro dos parâmetros estabelecidos para contagem de bactérias ácido láticas, porém uma estava fora dos limites exigidos para a determinação de coliformes a 35 e 45ºC, em todas as repetições. As análises físico-químicas mostraram que, dentro do que é exigido pela legislação, neste caso apenas proteína, todas as amostras obedeciam aos padrões vigentes e as demais, em sua maioria, coincidiram com as bibliografias consultadas. Ao serem submetidas à análise sensorial de escala Hedônica as amostras avaliadas obtiveram notas entre as correspondentes a indiferente e a gostei regularmente, sugerindo que todas precisam ser melhoradas quanto ao aspecto sensorial.