Location: Virus and Prion ResearchTitle: Transcriptome responses to respiratory virus infection of pigs within the tracheobronchial lymphnode following infection with PRRSV, PCV2 or IAV Author
Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/13/2018
Publication Date: 1/13/2018
Citation: Miller, L.C., Fleming, D.S., Harhay, G.P., Kehrli, Jr., M.E., Lager, K.M. 2018. Transcriptome responses to respiratory virus infection of pigs within the tracheobronchial lymphnode following infection with PRRSV, PCV2 or IAV. Plant & Animal Genome Conference XXVI, January 13-17, 2018, San Diego, California. Paper No. P1222.
Technical Abstract: Porcine reproductive and respiratory syndrome virus (PRRSV) is a major respiratory pathogen of swine that has become extremely costly to the swine industry worldwide, often causing losses in production and animal life due to their ease of spread. However, the intracellular changes that occur in pigs following viral respiratory infections are still scantily understood for PRRSV, as well as other viral respiratory infections. The aim of this study was to acquire a better understanding of PRRS disease by comparing gene expression changes that occur in tracheobronchial lymph nodes of pigs infected with either PRRSV, porcine circovirus type 2 (PCV2), or swine influenza virus (IAV) infections. The study identified and compared gene expression changes in the TBLN of 16 pigs following infection by PRRSV, PCV2, IAV, or sham inoculation. Total RNA was pooled for each group and time-point (1, 3, 6, and 14 days post infection) to make 16 libraries for analysis by Digital Gene Expression Tag Profiling. The data underwent standard filtering to generate a list of sequence tag raw counts that were then analyzed using multidimensional and differential expression statistical tests. The results showed that PRRSV, IAV and PCV2 viral infections followed a clinical course in the pigs typical of experimental infection of young pigs with these viruses. Gene expression results echoed this course, as well as uncovered genes related to shared and unique host immune responses to the 3 viruses. By testing and observing the host response to other respiratory viruses, our study has elucidated similarities and differences that can assist in development of vaccine and therapeutics that shorten or prevent a chronic PRRSV infection.