Listeria monocytogenes inoculated into refrigerated chicken breast fillets packed in modified atmosphere and irradiated: shelf life, natural microbiota and bacterial growth parameters

Authors

  • Samira Pirola Santos Mantilla Universidade Federal Fluminense
  • Érica Barbosa Santos Universidade Federal Fluminense
  • Helio de Carvalho Vital Centro Tecnológico do Exército
  • Sérgio Borges Mano Universidade Federal Fluminense
  • Robson Maia Franco Universidade Federal Fluiminense

DOI:

https://doi.org/10.5380/avs.v16i2.18041

Keywords:

carne de aves, fase de latência, irradiação, patógenos psicrotróficos, tempo de duplicação

Abstract

The ability of Listeria monocytogenes and other bacteria to multiply on chicken breast fillets packaged in air, vacuum and modified atmosphere (80%CO2/20%N2),  irradiated (2 and 3kGy), and kept at 1ºC ± 1°C for up to 34 days was evaluated. Microbiological changes and pH occurring in samples were monitored. Bacteriological analyses indicated that both lag phase and shelf life increased with radiation dose. The samples packed in modified atmosphere and exposed to 3.0 kGy exceeded the initial 9-day shelf life of air-packaged fillets in 34 days. Lactic acid bacteria were the most resistant to gamma radiation and high CO2 concentrations while coliforms and enterobacteria were the most sensitive. L. monocytogenes and Aeromonas spp. were able to grow in all samples. Irradiation increased the bacteriostatic effect of modified atmosphere packaging and can be used to improve microbiological quality and increase the shelf life of chicken breast fillets.

Author Biographies

Samira Pirola Santos Mantilla, Universidade Federal Fluminense

Médica Veterinária, Doutoranda em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem Animal. Departamento de Tecnologia dos Alimentos, Universidade Federal Fluminense.

Érica Barbosa Santos, Universidade Federal Fluminense

Médica Veterinária, Mestranda em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem Animal. Departamento de Tecnologia dos Alimentos, Universidade Federal Fluminense.

Helio de Carvalho Vital, Centro Tecnológico do Exército

Físico, Doutor, Pesquisador do Centro Tecnológico do Exército, Guratiba, Rio de Janeiro.

Sérgio Borges Mano, Universidade Federal Fluminense

Médico Veterinário, Professor, Doutor do Departamento de Tecnologia dos Alimentos, Universidade Federal Fluminense.

Robson Maia Franco, Universidade Federal Fluiminense

Médico Veterinário, Professor, Doutor do Departamento de Tecnologia dos Alimentos, Universidade Federal Fluminense.

How to Cite

Mantilla, S. P. S., Santos, Érica B., Vital, H. de C., Mano, S. B., & Franco, R. M. (2011). Listeria monocytogenes inoculated into refrigerated chicken breast fillets packed in modified atmosphere and irradiated: shelf life, natural microbiota and bacterial growth parameters. Archives of Veterinary Science, 16(2). https://doi.org/10.5380/avs.v16i2.18041

Issue

Vol. 16 No. 2 (2011)

Section

Preventive Veterinary Medicine

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