Main content

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

Show full item record

Title: Diversity and Cross-Immunity of Eimeria species infecting Turkeys in Commercial Flocks in Canada
Author: Imai, Rachel Kimiko
Department: Department of Pathobiology
Program: Pathobiology
Advisor: Barta, John Robert
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.
Date: 2018-05
Rights: Attribution-NonCommercial-NoDerivs 2.5 Canada

Files in this item

Files Size Format View Description
Imai_Rachel_201805_Msc.pdf 6.949Mb PDF View/Open final thesis

This item appears in the following Collection(s)

Show full item record

Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada
The library is committed to ensuring that members of our user community with disabilities have equal access to our services and resources and that their dignity and independence is always respected. If you encounter a barrier and/or need an alternate format, please fill out our Library Print and Multimedia Alternate-Format Request Form. Contact us if you’d like to provide feedback:  (email address)