Studies on the Disinfection of Hatching Eggs:I. The Effect of Formaldehyde Fumigation on Bacteria Contaminating the Egg Shell Surface
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Escherichia coli and Staphylococcus aureus were used to artificially contaminate egg shells for evaluation of formaldehyde fumigation. Formaldehyde was liberated from 40ml of formalin mixed with 20g of potassium permanganate per 1m3 of room capacity. Even after fumigation for 3.0 hours, surviving bacteria were detected when an egg was heavily contaminated with bacteria. No bacteria were recovered when the contaminated egg shell was washed with water before fumigation. This was thought to be due to a decrease in the number of bacteria on the egg shell surface as a result of washing.When producing SPF chicks, dirty eggs including slightly soiled eggs, should not be used for hatching. Only for the the production of commercial chicks, slightly soiled eggs should be used for hatching after washing.
- 日本家禽学会の論文
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