Project Number: 6612-32000-067-00
Start Date: Mar 06, 2012
End Date: Mar 05, 2017
There is a pressing need to identify the novel viruses present in the poultry gut—an important first step in determining their role(s) in enteric disease and production losses. Recent efforts in our laboratory using the next generation of nucleic acid sequencing and related techniques to discover and characterize novel viruses in the poultry gut have been very successful, and suggest that our knowledge of the poultry gut virus community is incomplete. It is possible that unidentified viruses or viral communities may play specific roles in enteric disease syndromes and can act as predictors of enteric disease. Therefore, the use of high-throughput, sequence-independent pyrosequencing technology (next generation sequencing and associated technologies) and metagenomic analysis techniques will allow the discovery and characterization of novel RNA and DNA poultry enteric viruses and viral communities, allowing the association of certain etiologic agents with the poultry enteric disease syndromes noted in the field. Proper and effective management of poultry enteric disease will require novel, up-to-date diagnostic assays in order to determine the prevalence of enteric viruses on farms and to characterize the pathology caused by enteric viral infection. Based upon the full genome and/or gene sequences of novel poultry enteric viruses discovered and initially characterized using high-throughput pyrosequencing and metagenomic analyses, conserved sequences will be identified as targets for molecular diagnostic tests. These tests will be designed and validated in our laboratory and made available to industry partners and the research community at large. Finally, a successful control strategy for poultry enteric disease must include novel vaccine platforms that have been specifically designed to improve flock performance, lessen disease severity, and reduce viral transmission in the field. A targeted approach will be used to design recombinant (viral) vaccines using live turkey/chicken enterotropic viruses as expression vectors for specific enteric virus proteins deemed to be disease-associated using bioinformatic approaches to analyze enteric viral nucleic acid.