Use of a probiotic formulation in control of Eimeria tenella infection in broiler chickens

dc.contributor.advisorBarta, J.R.
dc.contributor.authorMcPherson-Komorowski, Joanna L.
dc.date.accessioned2020-08-25T16:02:10Z
dc.date.available2020-08-25T16:02:10Z
dc.date.copyright2008
dc.degree.departmentDepartment of Pathobiologyen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractThe effects of probiotics in broiler chickens were evaluated with respect to feed conversion ratio (FCR), body weights, lesion scores, oocyst output, and cytokine and parasite-specific serum antibody production in birds facing a virulent 'Eimeria tenella' challenge infection. In 2 of 3 trials at 6 days post-infection (dpi), weights of chickens given probiotics twice before challenge were significantly greater than challenged birds without probiotics and feed conversion ratios of probiotic-treated birds were not different from non-challenged birds. Cecal interferon-[gamma] expression differed significantly between challenged and non-challenged birds but not within challenged or non-challenged groups. No significant differences in oocyst output were seen; however, 5 of 6 times probiotic-treated groups shed fewer oocysts. In summary, probiotics showed some evidence of reducing negative performance impact associated with coccidiosis. With further refinement, the use of probiotics may lessen the impact of coccidiosis and potentially reduce the poultry industry's reliance on prophylactic in-feed medications.en_US
dc.identifier.urihttps://hdl.handle.net/10214/20991
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectBroiler chickensen_US
dc.subjectProbiotic formulationen_US
dc.subjectControlen_US
dc.subjectEimeria tenella infectionen_US
dc.subjectFeed conversion ratioen_US
dc.titleUse of a probiotic formulation in control of Eimeria tenella infection in broiler chickensen_US
dc.typeThesisen_US

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