Sand, Jordan M.Arendt, Maria K.Repasy, AlecCook, Mark E.2022-10-052022-10-052015-11-05Sand, J. M. vd. (2015). "Oral antibody to interleukin-10 reduces growth rate depression due to Eimeria spp. infection in broiler chickens". Poultry Science, 95(2), 439-446.0032-57911525-3171https://doi.org/10.3382/ps/pev352https://www.sciencedirect.com/science/article/pii/S0032579119321637http://hdl.handle.net/11452/28968Eimeria spp. must be controlled in floor-reared poultry to prevent the onset of coccidiosis. Here we use an oral antibody to chicken IL-10 to prevent growth depression due to Eimeria spp. infection. Egg antibody directed against an antigenic peptide of IL-10 was produced in laying hens and measured using an ELISA. In the first experiment, egg yolk powder containing antibody to chicken IL-10 (vlpramqt conjugate) (anti-IL-10 yolk powder) was fed at 3.4 g/kg feed to determine growth response following mixed Eimeria spp. challenge. Chicks were fed either anti-IL-10 antibodies or control antibodies and challenged (d3) with either sterile saline or a 10x attenuated Eimeria spp. vaccine. Control-fed and Eimeria-challenged chicks grew 8.8% slower than those challenged with saline (P < 0.04), whereas anti-IL-10-fed Eimeria challenged chicks were not different from untreated controls. In the second trial a dose response was performed with doses of either 0 (control antibody), 0.34-, or 3.4-g anti-IL-10 yolk powder/kg feed. Control-fed, Eimeria-challenged chicks grew 10.6% slower than control saline-challenged chicks (P < 0.05); however, anti-IL-10-fed chicks fed either dose of anti-IL-10 were not different from saline-challenged chicks. Finally, the effect of anti-IL-10 on acquired immunity was investigated. Chicks were fed control or anti-IL-10 yolk powder and vaccinated with a 1x dose of Eimeria vaccine at d 3. After 14 d, antibody was removed from the diet. Chicks were either saline or 10x Eimeria challenged at d 17. We found that the anti-IL-10-fed chickens did not show a reduction in growth due to challenge; hence anti-IL-10 does not appear to affect adaptive immunity during the primary immunization. Overall, use of an antibody to IL-10 is a novel method in preventing adverse effects of Eimeria spp. infection in poultry.eninfo:eu-repo/semantics/openAccessAgricultureCoccidiosisEgg antibodyAnti-IL-10ChickenEimeriaMigration inhibitory factorCytokineExpressionImmunityReceptorIl-10Animal feedAnimalsAntibodies, protozoanAvian proteinsChickensCoccidiosisDietEimeriaFemaleInterleukin-10Poultry diseasesArticle0003710600000222-s2.0-8496387737343944695226772659Agriculture, dairy & animal scienceEimeria Tenella; Chicken; Coccidiostatic AgentAvian proteinInterleukin 10Protozoon antibodyAnalysisAnimalAnimal foodChickenCoccidiosisDietEimeriaFemaleGrowth, development and agingMetabolismParasitologyPhysiologyPoultry diseasesVeterinary