Effect of Different Immersion Tank Water Temperatures on the Microbiological Quality of Rabbit Carcasses

José Luiz Martins Silva, Marta Liliane de Vasconcelos, Joyce Graziella Oliveira, Danielle de Cássia Martins da Fonseca, Elizangela Domenis Marino, Alenia Naliato Vasconcellos, Luciana Oliveira Nascimento, Marcia Delgado da Cruz Gomes, Andreia Cristina Nakashima Vaz, Bruna Maria Salotti de Souza and Ana Maria Centola Vidal ()
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José Luiz Martins Silva: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Marta Liliane de Vasconcelos: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Joyce Graziella Oliveira: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Danielle de Cássia Martins da Fonseca: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Elizangela Domenis Marino: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Alenia Naliato Vasconcellos: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Luciana Oliveira Nascimento: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Marcia Delgado da Cruz Gomes: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil
Andreia Cristina Nakashima Vaz: Department of Technology and Inspection in Animal Products of the Veterinary School, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil
Bruna Maria Salotti de Souza: Department of Technology and Inspection in Animal Products of the Veterinary School, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil
Ana Maria Centola Vidal: Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, Brazil

Agriculture, 2023, vol. 13, issue 2, 1-10

Abstract: The pre-chilling of rabbit carcasses in an immersion tank directly interferes with microbial control. Therefore, this study was developed to examine the influence of different pre-chill tank water temperatures (4, 7, and 10 °C) on the microbiological quality of rabbit carcasses. Samples of rabbit carcasses and water and ice from the pre-chiller tank were collected; mesophilic aerobic heterotrophic microorganisms (MES), enterobacteria (EC), and coagulase-positive Staphylococcus (CPS) were counted; and the presence of Salmonella spp. was investigated. After the carcasses were immersed in the pre-chiller, there was a significant increase ( p < 0.05) in MES (38.69 and 88.06 Log CFU·mL −1 at 4 and 10 °C, respectively) and EC (3.20, 4.15, and 4.84 Log CFU·mL −1 at 4, 7, and 10 °C, respectively). The average EC count tended to increase after the carcasses were immersed in the pre-chiller at different temperatures, but this increase was not significant. Water samples showed MES, EC, and CPS counts only after the immersion of the carcasses; however, the presence of these microorganisms was not detected in any of the ice samples. Salmonella spp. was not identified in the analyzed samples. The microorganisms analyzed at the three pre-chiller water temperatures evaluated did not multiply on the surface of the rabbit carcasses or in the pre-chiller water after carcass immersion. This study showed that none of the three pre-chilling temperatures were able to reduce the count of indicator microorganisms in the carcasses of rabbits. These data provide scientific support to discuss the need for specific norms and guidelines for rabbit meat production.

Keywords: enterobacteria; mesophilic; Staphylococcus; Salmonella spp.; meat; chilling (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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