Dynamics of influenza infection in swine populations - Ontario Pork - Completed Research
Monday, August 10, 2020

Completed Research

Ontario Pork has a call for research proposals once a year. These projects were approved for funding by the board on recommendation of the research committee. If you have questions or need further information about the research posted here please contact Cristiane Mesquita at cristiane.mesquita@ontariopork.on.ca.

Completed Research

Dynamics of influenza infection in swine populations

Dynamics of influenza infection in swine populations

Project 14-010 - Researcher: Zvonimir Poljak

Dynamics of influenza infection in swine populations ( Swine Innovation Porc # 1348)
Researcher: Zvonimir Poljak, University of Guelph
Project funded in 2014 and completed in 2017.

The influenza virus continues to have a major impact on Canadian swine production. Significant genetic diversity and the emergence of new variants have complicated the control of this virus. In this project, jointely funded by Ontario Pork and Swine Innovation Porc, researchers analyzed the diversity of influenza A viruses in swine in Canada. They also studied the circulation of influenza A viruses and have worked on developing a real-time outbreak detection system. 

Researchers conducted a comprehensive genomic analysis of 16 influenza A virus samples from different clinical outbreaks within swine herds in Alberta, Manitoba, Ontario, and Saskatchewan in 2014. Out of the 16 influenza A virus samples, three were identified as H1N2 and 13 as H3N2. 

Results have shown that even in herds where new animals are rarely introduced, growing pigs continuously circulate the influenza A virus. Sows were also detected to be positive and, in rare instances, they could repeatedly test positive for the influenza A virus. Part of this research also focused on processing and summarizing the laboratory swine influenza information in a user-friendly report for producers, swine veterinarians, and regulatory experts. Different approaches have been used to display trends, detect the weeks and months where more samples have been submitted to laboratories and/or results of laboratory analysis have showed more positive samples to swine influenza. 


Additional reading:

· Geddes, G. (2018) Analyzing Influenza a Shot in the Arm for Industry. Electronic article. Swine Innovation Porc’s R&D Featured Articles. 2(8). Retrieved from: http://www.swineinnovationporc.ca/resources-e-newsletters.php 2016

· Poljak, Z., Arruda, A. (2016) Managing the Health Status of the Sow. Conference proceedings. Proceedings of the London swine conference, pp. 37-42. Retrieved from: http://www.londonswineconference.ca/images/pdfs/Proceedings/LSCProceedings2016.pdf

· Poljak, Z. (2016) Swine Influenza Series 1c. Dr. Zvonimir Poljak - A Review of Swine Influenza Research Currently Being Conducted at the Ontario Veterinary College (OVC) and by Other Researchers. Podcast. Ontario Animal Health Network Veterinary Podcasts, January 22, 2016. Retrieved from: https://oahn.podbean.com/page/5/ 2015

· Ferreira, J., Grgić H., Friendship, R., Wideman, G., Nagy Ѐ., Poljak, Z. (2015) Dynamics of influenza virus transmission in a swine herd and analysis of risk factors for recurrent infections. Conference proceedings. The 12th Mike Wilson Swine Research Day, p. 2. Retrieved from: https://www.uoguelph.ca/osrn/swine-research-day/proceedings-archives 2014

· Poljak, Z. (2014) Spread and control of influenza in swine populations: insight from analysis of infectious disease data. Conference proceedings. The 11th Mike Wilson Swine Research Day Proceedings, p. 1. Retrieved from: https://www.uoguelph.ca/osrn/swineresearch-day/proceedings-archives



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