Project leader: Dr Elizabeth Ball
The use of antibiotic growth promoters in broiler diets has been almost eliminated within UK from a combination of EU legislation and consumer (supermarket) pressure. A range of possible alternatives is being marketed, including probiotics, organic acids,herbs etc. Feed enzymes have been shown to modify the gut microflora and it has been suggested that this may be beneficial in protecting against Coccidiosis.
Studies on the effects of feed enzymes in combination with organic acids as part of a postgraduate project have shown up interactions affecting microflora and bird performance. There is anecdotal evidence that increasing the dissolved oxygen level in drinking water may alter gut microflora and bird performance. The proposed project will develop these aspects and evaluate the efficacy of lactobacilli strains which have been isolated as potential probiotics.
Murphy, T. C. , McCracken, K. J. , McCann, M.E.E. , George, J. , Bedford, M. R. (2009). Broiler performance and in vivo viscosity as influenced by a range of xylanases, varying in ability to effect wheat in vitro viscosity. British Poultry Science, 50(6):716-724
Owens, B. , McCann, M.E.E. , Preston, C. D. (2009). The effect of substitution of inorganic zinc with proteinated or chelated zinc on broiler performance. Journal of Applied Poultry Research, 18:789-794
Hoey, L. , McNulty, H. , McCann, M.E.E. , McCracken, K. J. , Scott, J. M. , Pentieva, K. (2009). Laying hens can convert high doses of folic acid added to the feed into natural. British Journal of Nutrition, 101:206-212
Pirgozliev, V. , Murphy, T. C. , Owens, B. , George, J. , McCann, M.E.E. (2008). Fumaric and sorbic acid as additive in broiler feed. Research in Veterinary Science, 84(3):387-394
Owens, B. , Tucker, L. , Collins, M. A. , McCracken, K. J. (2008). Effects of different growth promoters alone or in combination on broiler performance, gut microflora and ileal histology. British Poultry Science, 49(2):202-212
Owens, B. , McCracken, K. J. (2007). A comparison of the effects of different yeast products and antibiotic. British Poultry Science, 48(1):49-54
McCann, M.E.E. , Newell, E. , Preston, C. M. , Forbes, K. (2006). The Use of Mannan-oligosaccharides and/or tannin in broiler diets. International Journal of Poultry Science, 5(9):873-879
McCann, M.E.E. , McCracken, K. J. , Hoey, L. , Pentieva, K. , McNulty, H. , Scott, J. (2004). Effect of dietary folic acid supplementation on the folate content of broiler chicken meat. British Poultry Science, 45(1):S65-S65
Griffiths, L. , McCann, M.E.E. (2009). The use of glycerol in broiler diets. Local Farming Press, October 2009
Thompson, J. K. (2009). How does the feeding of supplements affect the growth and survival of bacteria in the gut?. Northern Ireland Pig Event, September 2009
Owens, B. , McCann, M.E.E. (2006). Too much zinc is not good for growth. Poultry World
Owens, B. , McCann, M.E.E. (2006). Organic zinc for broilers. Poultry World, August
McCann, M.E.E. (2007). The effect of maize particle size and enzyme addition on broiler performance. Report prepared for Danisco Animal Nutrition.