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Diversity and Cross-Immunity of Eimeria species infecting Turkeys in Commercial Flocks in Canada

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dc.contributor.advisor Barta, John Robert Imai, Rachel Kimiko 2018-05-15T17:26:48Z 2018-05-15T17:26:48Z 2018-05 2018-05-10 2018-05-15
dc.description.abstract To determine prevalence and diversity of Eimeria species in commercial turkey flocks, fecal samples (n=39) representing 27 commercial turkey farms (ON-20, SK-2, BC-3, AB-1, NS-1) were screened for coccidia; parasite diversity was determined using nested polymerase chain reactions targeting mitochondrial cytochrome c oxidase subunit I. Most samples (34/39) were Eimeria-positive with 1 to 6 species present (average 3.2 species/sample). An in vivo trial evaluated potential immunological cross-protection among the 6 detected Eimeria species. Protection against lesion development and reduced weight gains, and parasite fecundity were measured following high and low dose challenges, respectively. Significant adaptive immunological protection against lesion development, growth reduction, and parasite replication (95.4-100% reduced oocyst output) was demonstrated following homologous challenges. No adaptive immunological cross-protection between Eimeria species was detected. Diverse Eimeria species were both plentiful and widespread in Canadian commercial turkeys; the data reported herein will assist in the management of coccidiosis in commercial turkey operations. en_US
dc.description.sponsorship NSERC-Discovery Grant: #400566 (J.R.Barta), OMAFRA- Tier II- #200331 (J.R.Barta), OVC Graduate Stipend en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject Turkey en_US
dc.subject Eimeria en_US
dc.subject Coccidiosis en_US
dc.subject Parasitology en_US
dc.subject Genotyping en_US
dc.subject Species Diversity en_US
dc.subject Cross-Immunity en_US
dc.subject Poultry Disease en_US
dc.subject Food Production en_US
dc.subject Canada en_US
dc.title Diversity and Cross-Immunity of Eimeria species infecting Turkeys in Commercial Flocks in Canada en_US
dc.type Thesis en_US Pathobiology en_US Master of Science en_US Department of Pathobiology en_US
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada