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The Effects Of Air Quality On Chicken Health

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2012 IX International Livestock Environment Symposium (ILES IX)  ILES12-1770.(doi:10.13031/2013.41590)
Authors:   Huong T.L Lai, Mike G.B Nieuwland, Andre J. A Aarnink, Bas Kemp, Henk K Parmentier
Keywords:   airborne dust, broiler chickens, lipopolysaccharide, modulation, PAMP, intratracheal

We studied effects of concurrent challenge of slow growing broilers with: 1) airborne particles from two sizes: fine dust (FD, smaller than 2.5 micron) and course dust (CD, between 2.5 - 10 micron) which were directly collected from a broiler house, and 2) lipopolysaccharide (LPS) on intratracheal (i.t.) immunizations with the specific antigen human serum albumin (HuSA), and measured primary and secondary systemic (total) Ab responses and (isotype-specific) IgM, IgG and IgA responses at 3 weeks and at 7 weeks of age. All treatments affected immune responses at several time points, heart morphology and body weight gain (BWG), albeit the latter temporarily. Dust particles significantly decreased primary Ab (IgT and IgG) responses to HuSA at 3 weeks of age, but enhanced IgM responses to HuSA at 7 wk of age. Dust particles decreased secondary Ab responses to HuSA albeit not significantly. All the birds that were challenged with dust particles showed decreased BWG after primary, but not after secondary challenge. Relative heart weight was significantly decreased in birds challenged with CD, FD, LPS and HuSA at 3 weeks of age, but not in birds challenged at 7 weeks of age. Morphology (weight, width, and length) of hearts were also affected by dust challenge at 3 weeks of age.

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