Inactivation of Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 9027) in Skimmed Bovine Milk using UltraViolet-C Irradiation
- 1. Department of Food Technology and Human Nutrition, Ecole Nationale Superieure Agronomique, El Harrach, Algiers, Algeria
- 2. Department of Bioresource Engineering, Macdonald Campus, McGill University, Sainte-Anne-de-Bellevue, QC, Canada
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Abstract
The present study showed the effectiveness of UV-C irradiation on the inactivation of 3 strains of bacteria; Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 9027) inoculated in skim milk (0.1% fat content). The treatment chamber was made of stainless steel having 3 germicidal UV-C lamps. The treatments were carried out at different distances from source light: 5, 15, 25 and 45 cm at several treatment times (5, 10 and 15 min) and a constant treatment temperature (26.5 ± 2°C). The maximum inactivation extents were 1.8, 1.95 and 2.05 log reductions for Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa, respectively. Different inactivation kinetic models have been developed to determine the model that best represents the results obtained in this work. Weibull distribution was shown as the model that most accurately represented the data.The most sensitive strain to UV-C treatment was P. aeruginosa, followed by E.coli and S. aureus
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MalekAmiali, Fella-Sara Attal, Arezki Bitam, Ahmed Benchabane, & Lizzette Moreno-Garcia (2015); Inactivation of Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 9027) in Skimmed Bovine Milk using UltraViolet-C Irradiation, Int. J. of Adv. Res., 3 (05), 387-395, ISSN 2320-5407.
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