Using bacteria to protect poultry
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CTA. 1988. Using bacteria to protect poultry. Spore 13. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/44801
Dosing chicks with a cocktail of harmless bacteria protects them from being colonised by salmonella, and this could be the best way to reduce salmonella poisoning caused by eating infected poultry meat. More than ten years ago, Finnish scientists...
Dosing chicks with a cocktail of harmless bacteria protects them from being colonised by salmonella, and this could be the best way to reduce salmonella poisoning caused by eating infected poultry meat. More than ten years ago, Finnish scientists were the first to recognise that if a chick's gut is already inhabited by harmless bacteria, then disease-carrvina organisms. including salmonella, are unable to find a suitable site and are expelled. This competitive exclusion process means that carcasses cannot become contaminated during processing. Work on this has been followed up by the British Agricultural and Food Research Council's Institute of Food Research at Bristol, and although the technique has been proved to work, it has been difficult to isolate the necessary alternative bacteria, so the development of a purely defined flora is still some way off. In trials, gut flora containing about 48 strains of bacteria were collected from an adult bird which was known to be free of salmonella. These were then fed to young chicks. The mixture protected them from infection by three strains of salmonella. The next stage is to systematically omit bacteria in that mixture so that the important micro-organisms can be identified. Until the correct bacteria are defined it is not possible to use the technique commercially for fear of spreading harmful pathogens from farm to farm. However, it is possible that bacteria can be collected and used on the same farm. It is important to get the bacteria into the chicks at an early age and including the mixture in drinking water works well. Recent Dutch work has shown that spraying the mixture in the hatchery is also successful. For more details, contact: British Agricultural and Food Research Council Institute of Food Research Langford Bristol BS18 7DY UNITED KINGDOM