NA PRRS Symposium


December 4, 2021

Chicago Marriott Downtown Magnificent Mile Hotel
540 North Michigan Avenue
Chicago, IL 60611

The North American PRRS Symposium was initiated in November 2003 as the “International Workshop on PRRS”. The conference continues to focus on the latest knowledge and novel tools for the control of PRRS, one of the most costly viral diseases to ever face a global swine industry. In recent years, the emergence of new swine viruses, including the PEDV and ASFV, has expanded the topics of this symposium to emerging and foreign swine diseases. The symposium has integrated with NC229, which provides the means to deliver a much larger and more comprehensive meeting experience.

This very successful meeting is attended by an internationally recognized group of scientists, researchers, industry and academic professionals and students.

This year’s event will be scheduled in connection with the Conference of Research Workers in Animal Diseases (CRWAD).


All times are in central time.

Friday, December 3, 2021

4:00 – 6:00 pm: Symposium Check-In/Onsite Registration

6:30 – 8:30 pm: NA PRRS/NC229 Organizing Committee Meeting

Saturday, December 4, 2021

6:30 – 11:00 am: Symposium Check-In/Onsite Registration

7:00 – 8:30 am – Zoetis Breakfast Special Session: Field Outreach – Emerging and Foreign Disease Threats
Chicago Ballroom D/E
Moderator: Jose Angulo

8:30 – 8:40 am – Opening Remarks
Chicago Ballroom D/E
Ying Fang and Sheela Ramamoorthy

8:40 – 9:40 am – Plenary Session 1: Viral Infection and Gene Expression: New Features in Nidoviruses
Chicago Ballroom D/E
Moderators: Diego Diel and Hiep Vu

9:40 – 10:10 am – Break

10:10 – 11:30 am – Plenary Session 2: Virus-Host interaction and Host Responses
Chicago Ballroom D/E
Moderators: Scott Kenney and Zhengguo Xiao

  • 10:10 – 10:30 am (S07): PRRS Virus Glycoprotein Interactions With CD163 and Targets of Virus Neutralization
    Raymond (Bob) Rowland, University of Illinois
  • 10:30 – 10:45 am (S08): Expression Levels of CD169, CD163 and CD151 in PRRSV-Infected Peccaries
    Christine Harness, Iowa State University
  • 10:45 – 11:00 am (S09): A Virulent and Pathogenic Infectious Clone of Senecavirus A
    Diego Diel, Cornell University
  • 11:00 – 11:15 am (S10): Mediation of Type 1 IFN Signaling by PRRSV nsp5-related Protein
    Chia-Ming Su, University of Illinois
  • 11:15 – 11:30 am (S11): Phenotypic Effect of a Genetic Variant Linked to DIO2 on Fetal Outcomes in PRRSV-2 Infected Gilts
    Haesu Ko, University of Alberta

11:30 am – 1:00 pm – Lunch Break

1:00 – 2:30 pm – Plenary Session 3: Vaccines and Therapeutics
Chicago Ballroom D/E
Moderators: Andreia Arruda and Federico Zuckermann

  • 1:00 – 1:20 pm (S12): Development of an Effective Vaccine Against the Pandemic Strain of African Swine Fever Virus That Grows in Cell Culture
    Douglas Gladue, PIADC-USDA-ARS
  • 1:20 – 1:40 pm (S13): Targeting Suicidal Replication to Enhance the Safety of Attenuated Viral Vaccines
    Sheela Ramamoorthy, North Dakota State University
  • 1:40 – 2:00 pm (S14): Effective Protection Induced by an Experimental Subunit DIVA Vaccine Against PRRS Virus
    Federico Zuckermann, University of Illinois
  • 2:00 – 2:15 pm (S15): Intranasal Delivery of Inactivated Influenza Virus and Poly(I:C) Adsorbed Corn-Based Nanoparticle Vaccine Elicited Robust Antigen-Specific Cell-Mediated Immune Responses in Maternal Antibody Positive Nursery Pigs
    Veerupaxagouda Patil, The Ohio State University
  • 2:15 – 2:30 pm (S16): Amplification of IgG Genes from Classical Swine Fever Virus C-strain E2 Glycoprotein Specific Single Porcine B Cells
    Lihua Wang, Kansas State University

2:30 – 3:00 pm – Break

3:00 – 4:05 pm – Plenary Session 4: Diagnostics and Disease Control
Chicago Ballroom D/E
Moderators: Roman Pogranichniy and Mariana Kikuti

  • 3:00 – 3:20 pm (S17): PRRSV L1C: A Rapid Response to a National Crisis
    Scott Dee, Pipestone
  • 3:20 – 3:35 pm (S18): Investigation of Vesicular Lesions in Pigs With Unknown Causative Agents
    Ethan Aljets, Iowa State University
  • 3:35 – 3:50 pm (S19): Development of a Blocking Enzyme-Linked Immunosorbent Assay for Detection of Antibodies against African Swine Fever Virus
    Fangfeng Yuan, University of Illinois
  • 3:50 – 4:05 pm (S20): Differentiation of Animals Vaccinated with Flag T4G Against Classical Swine Fever Virus from Infected Pigs Using a Dendrimeric Peptide-Based Approach
    Jose A. Bohorquez, IRTA-CReSA

4:05 – 5:00 pm – NC229 Business Meeting
Chicago Ballroom D/E
Moderators: Roman Pogranichniy and Sheela Ramamoorthy

6:00 – 8:00 pm – Benfield Poster Session and Reception
Chicago Ballroom A/B/C


Pre-Registration for the NA PRRS Symposium has closed. Onsite registration will be available during the following hours at symposium check-in desk located at the Chicago Marriott Downtown Magnificent Mile on the 5th floor:

  • Friday, December 3, 4:00 p.m. – 6:00 p.m.
  • Saturday, December 4, 6:30 a.m. – 11:00 a.m.

Payment must be provided at the time of registration to guarantee enrollment. Early registration is recommended.

  • Pre-Registration (On or before November 30, 2021): $100
  • Onsite Registration: $150

Continuing Education
8.5 hours of continuing education is available for veterinarians. Continuing education will be granted for in-person sessions only.

Cancellation Policy
Full refunds, less a 10 percent cancellation fee, will be given if written notification is received by Tuesday, November 30, 2021. Written cancellation should be sent to Registrations are transferable. After November 30, 2021, refunds will not be made. We reserve the right to cancel sessions and to change speakers if necessary. In the event of a conference cancellation, all registrants will receive a full refund. The University is not responsible for travel expenses in the event of a cancellation or date change.

Please note: registrations for the CRWAD should be submitted separately though the CRWAD website.

Hotel Reservations

Attendees are responsible for making their own hotel reservations prior to November 10. Hotel rooms are available for the NA PRRS Symposium through the CRWAD website.

** Hotel deadline has been extended to Friday, November 19

Abstract Submission

Abstract Information and Instructions

NC229 Annual Report Template

Abstract Submission Deadlines:

  • July 15, 2021: Early Abstract Submission Deadline
  • September 15, 2021: Extended Deadlines for Abstract Submission
  • October 22, 2021: Late-Breaking Abstract Submission Deadline (Poster Only)

Please note: Abstract submissions for the CRWAD should be submitted separately though the CRWAD website.

Travel Fellowship Application

Travel fellowships are provided to aid graduate students and postdoctoral fellows in presenting their experimental results at the symposium.

The awarded funds are determined by the NA PRRSS Travel Fellowship Awards Selection Committee and are given in the form of a reimbursement check (or wire transfer for international recipients) for allowable expenses up to the award amount. Awardees will be notified by October 1, 2021.

Travel Fellowship Information and Instructions

Application Deadline: July 15, 2021

Please note: Awards for the CRWAD should be submitted separately though the CRWAD website.

Job Board

The University of Illinois College of Veterinary Medicine now makes it easier to hire for or find jobs in alignment with the NA PRRS Symposium through the college Job Board.

Those hiring can select “NA PRRS” for the job category allowing those seeking a job to be able to filter for that designation.

Post Job

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COVID-19 Guidelines

The NA PRRS Symposium will adhere to state of Illinois guidelines outlined by local health authorities and the host hotel. Masks must be worn while indoors.

Symposium seating will allow for appropriate distancing. The Chicago Marriott Downtown Magnificent Mile has also installed high level filtering systems to clean and increase airflow in public spaces. The hotel will supply hand sanitizing stations throughout the meeting space, lobby, and near elevators.

We will continue to monitor municipality, hotel, and CDC recommendations and make changes as needed.   At this time, masks are required to be worn indoors unless actively eating or drinking.  Masks are not required in individual sleeping rooms. 

Organizing Committees

NA PRRSS/NC229 Advisor:

  • Dr. Raymond (Bob) R. R. Rowland, University of Illinois

Planning Committee:

  • Executive Director, NA PRRSS – Dr. Ying Fang, University of Illinois
  • Industry Liaison – Dr. Lisa Becton, National Pork Board
  • NA PRRSS Internal Coordinators and Proceedings Editors – Kristen Eighner and Crystal Zulauf, University of Illinois

Joint Scientific Committee:

Co-Chairs, Joint Scientific Committee:

  • Dr. Ying Fang, University of Illinois
  • Dr. Sheela Ramamoorthy, North Dakota State University

Committee Members:

  • Dr. Diego G. Diel, Cornell University
  • Dr. Scott Kenney, The Ohio State University
  • Dr. Pablo Pineyro, Iowa State University
  • Dr. Roman Pogranichniy, Kansas State University
  • Dr. Hiep Vu, University of Nebraska
  • Dr. Zhengguo Xiao, University of Maryland


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Questions, email the Office of Public Engagement at or call 217-333-2907.