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Impact of nutrition on the innate immune response to infection in poultry¹

Southern Plains Agricultural Research Center, USDA-Agricultural Research Service, College Station, TX 77845

² Corresponding author: mike.kogut{at}ars.usda.gov

Viral and bacterial diseases remain a threat to the poultry industry and countermeasures to prevent and control them are needed due to production losses. With the continued threat of exotic and emerging diseases and concern over the use of antibiotics in animal production, there is a serious and urgent need to find safe and practical alternatives to prevent or control pathogens. Identification of new tools for the design of new immunological interventions or therapeutic antimicrobials to reduce microbial pathogens in poultry is now required more than ever. Immunological interventions to reduce microbial pathogens in poultry would be of great value to the poultry industry and to the consumer. We have been advocating boosting immunity and encouraging the host to utilize its innate immune system to control and clear infections. Our research has addressed the use of innate immune mechanisms and components to develop new immune modulators (prophylactic and therapeutic) and the characterization and production of antimicrobial peptides as potential immune modulators in poultry. Dietary bioactive food components that interact with the immune response have considerable potential to reduce susceptibility to infectious diseases. With this premise, this paper asks and answers a series of pertinent questions on the utilization of avian immunity for increasing resistance to a variety of potential pathogens problematic in today’s commercial poultry industry. Using experimental data to provide answers to these questions, we hope to stimulate a dialog between avian immunologists and nutritionists that results in coordinating and integrating their expertise into specific practical solutions that will benefit the industry and improve the well-being of commercial poultry.

Key Words: innate immunity • nutrition • poultry • immune function

¹ Papers from the Informal Nutrition Symposium, "Modulating Immunity: The Role of Nutrition, Disease, Genetics, and Epigenetics," were presented at the Poultry Science Association 97th Annual Meeting in Niagara Falls, Ontario, Canada, on July 20, 2008.

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