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EVALUATING DIFFERENCES IN BODY WEIGHT, GUT MORPHOLOGY, IMMUNE RESPONSE, AND SICKNESS BEHAVIOR IN FAST- AND SLOW- GROWING BROILER CHICKENS WHEN INFECTED WITH SALMONELLA ENTERICA SEROVAR TYPHIMURIUM

dc.contributor.advisorWeimer, Shawnaen_US
dc.contributor.authorSnyder, Ashlyn Marieen_US
dc.date.accessioned2021-09-22T05:39:45Z
dc.date.available2021-09-22T05:39:45Z
dc.date.issued2021en_US
dc.identifierhttps://doi.org/10.13016/oog8-e1ip
dc.identifier.urihttp://hdl.handle.net/1903/27974
dc.description.abstractFast growth rate in broilers comes with welfare concerns and research is needed to determine if fast- and slow-growing broilers differ in pathogen resistance. The objective of this study was to evaluate differences in fast- (FG) and slow-growing (SG) broilers when challenged with Salmonella Typhimurium or broth (control) 14 days post-hatch. Plasma IgA and IgG, jejunum and ileum histomorphology, and behaviors were measured. FG had greater d12 and d24 body weight and d7 jejunum measures, indicating better absorption, and earlier increases in plasma IgA and IgG, indicating earlier immune development. SG had greater d7 IgG, indicating stronger maternal immunity. Post-challenge, FG gut morphology was more impaired, and SG had greater IgA and reduced sham foraging, indicating a stronger immune response to challenge. The results illustrate fast- and slow-growing broilers differ in Salmonella resistance, which can help breeders make selection decisions to prevent Salmonella transmission into the human food supply.en_US
dc.language.isoenen_US
dc.titleEVALUATING DIFFERENCES IN BODY WEIGHT, GUT MORPHOLOGY, IMMUNE RESPONSE, AND SICKNESS BEHAVIOR IN FAST- AND SLOW- GROWING BROILER CHICKENS WHEN INFECTED WITH SALMONELLA ENTERICA SEROVAR TYPHIMURIUMen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentAnimal Sciencesen_US
dc.subject.pqcontrolledAnimal sciencesen_US
dc.subject.pquncontrolledbehavioren_US
dc.subject.pquncontrolledbroileren_US
dc.subject.pquncontrolledgrowth rateen_US
dc.subject.pquncontrolledimmune responseen_US
dc.subject.pquncontrolledSalmonellaen_US


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