Radiosensitivities of bacterial isolates on minced chicken and poached chicken meal and their elimination following irradiation and chilled storage |
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| Institution: | 1. Center of Regional and Local Development (CEDER), Cochrane, 1225, Osorno, Chile;2. Departamento de Economía Aplicada II, Facultad de Ciencias Económicas y, Empresariales, Avda. Ramón y Cajal, n.1, 41018 Sevilla, Spain;3. Instituto de Sociología y Estudios Campesinos, Campus de Rabanales, Cordoba, Spain;1. Institute of Agroindustry, Technological University of the Mixteca, Oaxaca, Mexico;2. Department of Food Hygiene and technology, University of León, Campus Vegazana, s/n, 24007, León, Spain;3. Instituto de Ganadería de Montaña (CSIC-Universidad de León), Finca Marzanas, E-24346 Grulleros, León, Spain;4. Department of Agricultural, Food and Nutritional Science, University of Alberta, Lacombe Research Centre, 6000C&E Trail, Lacombe, Alberta T4L 1W1 Canada;5. Instituto Tecnológico Agrario, Junta de Castilla y León, Finca Zamadueñas, Ctra. Burgos, km. 119, E-47071 Valladolid, Spain |
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| Abstract: | The radiosensitivities of Escherichia coli and Staphylococcus aureus on poached chicken meal (PCM) and minced chicken substrate (MCS) were determined. Effect of irradiation (0, 1, 2 kGy) on total viable cells (TVC) of PCM components was determined under chilled (3–5 °C) storage (0, 9, 14, 21 days) and challenge testing of the bacterial isolates with irradiation (0, 2, 3 kGy) was also conducted on PCM under chilled storage (0,7, 14, 21, 28 days). Additionally, sensory evaluation of the PCM components was assessed with irradiation (0, 2, 3 kGy) during chilled storage (0, 7, 14, 21 days). D10 of E. coli on PCM and MCS were 0.18 and 0.25 kGy whiles those of S. aureus were 0.27 and 0.29 kGy, respectively. D10 values for PCM<MCS and values for S. aureus>E. coli. 2 kGy controlled TVC and extended the shelf life of meals to ?14 days but 3 kGy was required to eliminate E. coli and S. aureus. Sensory qualities of the meal were not affected by an irradiation dose of 3 kGy. |
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