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Abstract
1. The aim in this study was to evaluate cleaning and disinfection programmes in battery cage and on-floor layer houses in France.
2. Cleaning and disinfection efficiency was assessed by a visual evaluation of cleaning and a bacteriological monitoring of surface contamination from counts of thermotolerant streptococci on contact agar plates.
3. In battery cage houses, dropping belts, manure conveyors, and house floors remained highly contaminated due to poor cleaning in half of the buildings examined.
4. In on-floor houses, a high standard of cleaning was achieved but errors in the planning of cleaning and disinfection operations sometimes led to a high residual contamination of nest boxes and egg sorting tables.
Acknowledgement
This project was supported financially by the Food Safety Department of the French Ministry of Agriculture, the National Office for Meat and Dairy Products (aid for technological development OFIVAL), the French Union for Egg Promotion (CNPO) and the Région Bretagne with the Breton Union of Meat Producers (UGPVB). The authors gratefully acknowledge the poultry production companies and the farmers for their cooperation in this project.