Different poultry feeding systems exist to supply the feed to poultry. Every system has own risks for contamination of feed. It is important to prevent fecal contamination of poultry in the feeding pans. These faeces can contain bacteria like Salmonellae and Campylobacter which are a threat to human food safety.
Another aspect in preventing contamination is the disinfection and cleaning of the feed systems. The pans in the stables have to be disinfected every time a new flock of chickens enters the stable. Also the auger tubes which distribute the feed to the feeding pans have to be included. When the tubes are not cleaned accumulation of feed material (fat) can occur and this can cause contamination.
Disinfection of auger systems can be done either dry (prefered) or wet. Wet is difficult, since the auger inside will prevent a proper and thorough cleaning, but it may help to soak the dirt which accumulated inside. Soaking should be accompanied by a detergent. After cleaning an disinfection the system should be allowed to dry.
Dry disinfection can be done by introduction into the auger of high concentrations of organic acids or formaldehyde which is mixed into a carrier such as oat hulls. The product has to remain inside for at least 24 h, but preferably more, and can be removed easily. It may be spread in the house or be stored for futere re-use. The organic acids will evaporate inside the auger tube and kill bacteria.