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Bactericidal Treatment of Hatching Eggs V: Efficiency of Repetitive Immersions in Hydrogen Peroxide or Phenol to Eliminate Salmonella from Hatching Eggs

USDA-ARS Russell Research Center, PO Box 5677, Athens, Georgia 30604-5677

Correspondence: N. A. Cox, E-mail: ncox{at}saa.ars.usda.gov

In previous studies, immersion in hydrogen peroxide and phenol reduced Salmonella-positive eggs without reducing hatchability. This study was carried out to determine if three consecutive dips in a chemical was more effective than a single immersion to eliminate Salmonella from hatching eggs. Eggs were inoculated with a marker strain of Salmonella typhimurium by submerging the egg in a solution containing low numbers (10³) or high numbers (10⁵) of the organism. After allowing the eggs to dry, they were immersed for 1, 2, and 3 min in water, a 1.4% solution of hydrogen peroxide, or a 0.39% solution of phenol. With the low inoculation, Salmonella were eliminated from an additional 22%of the eggs when three dips were used as compared to a single dip.

Key Words: disinfectant • hatching egg • multiple immersion • Salmonella •