chilling tanks effectiveness on the reduction of bacterial contamination of poultry carcasses/
eficácia dos tanques de pré-resfriamento na redução de contaminação bacteriana em carcaças de frango

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ID: 133556
2006
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Abstract
The aim of this research was to evaluate the chilling tanks effectiveness on the reduction of microbial contamination of poultry carcasses from an abattoir, from March to September 2005. Poultry samples were taken in three times, in the beginning, middle and in the end of morning turn, in a total of 60 samples, 20 in each sampling time before the entrance in the chilling tank and other 60 samples, 20 in each sampling time after the exit of the chilling tank. Poultry samples were tested to total coliforms (CT), thermotolerant coliforms (CTT), mesophilic aerobes (AM) and psychrotrophic microorganisms (MP). For CT and CTT research were used the multiple tube fermentation technique, for AM were usedPetrifilm™C system and for MP Plate Count Agar. The higher mean of the Most Probable Number of CT and CTT (3,83 log MPN/g and 3,78 log MPN/g) and AM and MP counts (6,61 log UFC/g and 4,58 log UFC/g) on poultry carcasses occurred in the first time of sampling, before the entrance in the pre-chiller tank.There was a significant (p<0,05) decrease on the MPN of CT and CTT and the AM counts on poultry, before the entrance and after the exit of the chilling tanks, in the first sampling time. It is possible to conclude that, in this slaughterhouse, the chilling tanks were effective on the reduction of microbial contamination of poultry carcasses only in the first sampling time. CT and CTT were not found in abattoir water-supply samples.

O objetivo desta pesquisa foi avaliar eficácia dos tanques de pré-resfriamento na redução da contaminação microbiana de carcaças de frango. As amostras foram coletadas de um abatedouro no período de março a setembro de 2005, totalizando 20 coletas. Foram coletadas amostras de carcaças em três horários representando o início, meio e final do turno matutino de abate sendo 60 amostras (20 em cada horário) antes da entrada no pré-chiller e 60 amostras (20 em cada horário) após a saída do chiller. As amostras de frango foram submetidas à pesquisa de coliformes totais (CT), coliformes termotolerantes (CTT), aeróbios mesófilos (AM) e psicrotróficos (MP). A enumeração de CT e CTT foi realizada através da técnica dos tubos múltiplos, a de AM através do sistema Petrifilm™C e a contagem de MP em Agar Padrão para Contagem. As médias mais elevadas do número mais provável de CT e CTT (3,83 log NMP/g e 3,78 log NMP/g, respectivamente) e das contagens de AM e MP (6,61 log UFC/g e 4,58 log UFC/g, respectivamente) nas carcaças ocorreram no primeiro horário de coleta, antes da entrada no pré-chiller. Observou-se uma diminuição significativa (p < 0,05) do NMP de CT e CTT e contagem de AM nas carcaças, após a saída dos tanques de resfriamento, no primeiro horário de coleta, indicando que os tanques de pré-resfriamento, no frigorífico estudado, foram eficazes na remoção de microrganismos das carcaças apenas no início dos trabalhos de abate. Não foi detectada a presença de CT e CTT nas amostras de água de abastecimento.

Reference Key
mller2006semina:chilling Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ernst Eckehardt Müller, Julio Cesar de Freitas, Samuel Fabre Sanches, Ronaldo Tamanini, Juçara Tinasi de Oliveira, Melissa Lopes, Juliana Arena Galhardo
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Journal frontiers in neuroendocrinology
Year 2006
DOI
10.5433/1679-0359.2006v27n4p647
URL
http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/2529
Keywords
Agriculture (General)

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