Hatching eggs sanitized with chlorine dioxide foam: egg hatchability and bactericidal properties

Area of Science:

• Poultry Science
• Food Safety
• Microbiology

Background:

• Formaldehyde fumigation is a common method for sanitizing hatching eggs.
• Health and environmental concerns are driving the search for safer alternatives to formaldehyde.

Purpose of the Study:

• To investigate the efficacy of chlorine dioxide (ClO2) as an alternative sanitizing agent for hatching eggs.
• To compare the effects of ClO2 and formaldehyde on egg hatchability and bacterial contamination.

Main Methods:

• Chicken and duck eggs were treated with varying concentrations and durations of ClO2 solutions, ClO2 foam, and formaldehyde fumigation.
• Hatchability rates were recorded and compared to untreated control groups.
• A novel method was developed to assess the bactericidal potential of sanitizing agents against inoculated bacteria on sterile eggs.

Main Results:

• Dipping chicken eggs in ClO2 solutions for over 5 minutes or at concentrations >100 ppm Cl reduced hatchability.
• ClO2 foam treatment and formaldehyde fumigation did not adversely affect chicken egg hatchability.
• ClO2 foam significantly improved hatchability (>10%) and hatch rates (>6%) in soiled duck eggs.
• Both ClO2 foam and formaldehyde fumigation effectively reduced inoculated bacteria on sterile chicken eggs.

Conclusions:

• Chlorine dioxide foam is a potentially viable and safer alternative to formaldehyde fumigation for sanitizing hatching eggs.
• Optimized application methods (foam) are crucial for ClO2 efficacy and safety in poultry operations.
• The developed bactericidal assessment method provides a valuable tool for evaluating egg sanitizers.