Investigations on the Effect of Ozone as a Disinfectant of Egg Surfaces |
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| Authors: | PG Braun N Fernandez H Fuhrmann |
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| Affiliation: | 1. Institute of Food Hygiene, Veterinary Faculty , University of Leipzig , An den Tierkliniken 1, D - 04103, Leipzig, Germany;2. Institute of Physiological Chemistry, Veterinary Faculty , University of Leipzig , An den Tierkliniken 1, D - 04103, Leipzig, Germany |
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| Abstract: | The feasibility of gaseous ozone to reduce the number of microorganisms on the shell surface, of Salmonella Enteritidis (S.E.) in particular, of avian hatching eggs was investigated. Shell eggs were externally contaminated with S.E. to contain either 102–104 or 105–106 cfu/shell. Subsequently, the eggs were exposed to several ozone concentrations ranging from 0.5% to 5% wt/wt in combination with two relative humidities (< 30, > 70%) at room temperature. Exposure times varied between 20 minutes and 24 hours. A complete inactivation of 102–104cfu S.E./egg shell was reached by using an ozone concentration of 1% (wt/wt) for 120 min. Considering higher concentrations of S.E. on the shell ozone treatment caused approximately a 6 log10 reduction. This demonstrates that gaseous ozonation is suitable for applications in hatcheries provided that high-power ozone generators are available. The parameters should be verified in large ozone cabinets. |
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| Keywords: | Ozone Ozone Treatment Hatching Eggs Disinfection Salmonella Enteritidis |
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