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Advanced Oxidation Process sanitization of hatching eggs reduces Salmonella in broiler chicks

A.C. Rehkopf, J.A. Byrd, C.D. Coufal, T. Duong
Poultry science 2017 v.96 no.10 pp. 3709-3716
Salmonella, automation, biosecurity, broiler chickens, chicks, critical control points, egg contamination, eggs, gastrointestinal system, hatcheries, hatching, hydrogen peroxide, microbiological quality, oxidation, pathogens, poultry production, poultry products, sanitizers, ultraviolet radiation
The microbial quality of eggs entering the hatchery is an important critical control point for biosecurity, pathogen reduction, and food safety programs in poultry production. Developing interventions to reduce Salmonella contamination of eggs is important to improving the microbial food safety of poultry and poultry products. The hydrogen peroxide (H₂ O₂) and ultraviolet light (UV) Advanced Oxidation Process (AOP) has been previously demonstrated to be effective in reducing Salmonella on the surface of experimentally contaminated eggs. The objective of this study was to evaluate the effect of treating eggs with an egg-sanitizing apparatus using the H₂ O₂/UV AOP on Salmonella contamination during incubation, hatching, and in broiler chicks during grow-out. Experimentally contaminated eggs were treated using the automated H₂ O₂/UV AOP egg sanitizer and incubated for 21 d. AOP sanitization reduced Salmonella up to 7 log₁₀ cfu egg⁻¹ (P < 0.05) from the surface of experimentally contaminated eggs and reduced the number of Salmonella positive eggs by up to 75% (P < 0.05) when treated 1 h post-inoculation. AOP treatment also reduced the number of Salmonella-positive eggs during incubation. Additionally, Salmonella was recovered from more chicks hatched from untreated eggs than from eggs treated using the H₂ O₂/UV AOP egg sanitizer (P < 0.05) through 14 d posthatch. These data suggest reduction of Salmonella contamination on the surface of eggs using the H₂ O₂/UV AOP egg sanitizer prior to incubation may reduce the gastrointestinal colonization of chicks by Salmonella.