Dr. Troy Bigelow - Swine Health Program Update


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Swine Health Program Update - Dr. Troy Bigelow, USDA/APHIS/VS, from the 2012 Annual Conference of the National Institute for Animal Agriculture, March 26 - 29, Denver, CO, USA.

More presentations at: http://www.trufflemedia.com/agmedia/conference/2012-decreasing-resources-increasing-regulation-advance-animal-agriculture

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Dr. Troy Bigelow - Swine Health Program Update

  1. 1. Safeguarding Animal Health National Institute of Agriculture Swine Disease Committee Troy Bigelow, DVM Swine Health Programs U.S. Department of Agriculture Animal and Plant Health Inspection Service Veterinary Services March, 2012 1 Swine Health Programs Updates
  2. 2. Safeguarding Animal Health Swine Surveillance and Regulatory Programs Updates • Pseudorabies (PRV) • Swine Brucellosis (SB) • Classical Swine Fever (CSF) • Swine Health Protection • Trichinae Certification • Swine Influenza Virus (SIV) 2
  3. 3. Safeguarding Animal Health Swine Brucellosis FREE 2012 SB High risk herd infections identified and indemnified • HI- Dually infected herd (45 animals) • TX- One animal • GA- One dually infected herd (38) animals 3
  4. 4. Safeguarding Animal Health PRV Surveillance: The Numbers • FY 2011 PRV data 4 FY 2010 FY 2011 Diagnostic laboratory serologic submissions (total) 14,567 27,994 Sick pig submissions 19 1,889 Routine Serology/herd profiling 13,967 24,891 High risk swine population 501 966 Swine with known feral swine exposure 8 153 Epidemiological traceback 58 95 Sow boar testing (SB too) 278,022 290,304 Meat juice 13,318 13,831
  5. 5. Safeguarding Animal Health Pseudorabies Surveillance • All States remain Stage V “Free” for PRV • FY 2012 PRV high risk herd infections identified and indemnified HI- one dually infected herd (45 animals) GA- one dually infected herd (38) animals 5
  6. 6. Safeguarding Animal Health Pseudorabies Surveillance • PRV is a Federal/State/industry regulatory program All samples have a chance for surveillance including slaughter, practitioner submitted or other sampling • Testing feral swine for PRV is monitoring PRV gB ELISA • PRV surveillance program targets to protect the commercial industry 6
  7. 7. Safeguarding Animal Health Coming Soon to the Federal Register A New Approach to Managing Pseudorabies and Swine Brucellosis: A Proposed Framework 7
  8. 8. Safeguarding Animal Health The Concept Paper • Similar to TB/Brucellosis Concept Paper • Proposes Modernizes the regulatory framework to create a comprehensive risk-based, flexible regulatory program Prescribes results vs. actions Reduces the introduction of disease by using science and surveillance methods as necessary to provide assurances that animals in commerce are low-risk for disease 8
  9. 9. Safeguarding Animal Health The Concept Paper • What it proposes (continued) Changes the reporting mechanisms to reduce the burden of annual reports Increases options for managing infected herds and creates a consistent program for indemnity for swine Enhances PRV and swine brucellosis surveillance Eliminates the State classification system and moves to a science-based approach 9
  10. 10. Safeguarding Animal Health Change in Pseudorabies and Swine Brucellosis • Issues needing correction  Indemnity  PRV and SB  Disease eradicated in commercial swine, but program does not take into account changing risk factors  All States are considered disease free, therefore all swine in States are “free.”  Disease still exists in wild/feral swine/swine allowing feral exposure  The regulations pertain to movement of diseased animals  Surveillance needs modification to allow for targeted surveillance 10
  11. 11. Safeguarding Animal Health The Concept Paper • Combines SB and PRV into one program • Establishes interstate movement parameters for swine neither infected or exposed to PRV or SB • Provides conditions for interstate movement of infected or exposed swine 11
  12. 12. Safeguarding Animal Health The Concept Paper • Transparency  The concept proposed is open and transparent  Information will be able to be reviewed by all through Federal Register notices. • Laboratories  The concept paper proposes  To address laboratory concerns  Create consistency between programs and laboratories to ensure reliable results. 12
  13. 13. Safeguarding Animal Health The Concept Paper • The concept paper contains details on current issues the PRV/SB program faces and possible solutions for the future. • We welcome comments.  Remember:  We have to change our way of doing business to provide the best service possible to all stakeholders.  Provide the best program to address risks. • PRV and SB is eradicated from commercial herds.  Is it not time to evolve from an eradication phase to the next step? 13
  14. 14. Safeguarding Animal Health Classical Swine Fever • Surveillance Streams Swine highly suspicious for CSF Sick pigs submitted to veterinary diagnostic labs High-risk slaughter swine Feral swine Swine from waste feeding operations in high-risk States 14
  15. 15. Safeguarding Animal Health CSF Surveillance: The Numbers FY2011 • Sick pigs submitted to diagnostic labs: 2,840 • Slaughter swine sampled with high probability of exposure: 2,489 • Feral swine sampled: 3155 • Swine with a high probability of exposure (garbage feeders and high-risk FL, TX, and PR herds): 3,834 • Swine sampled in lower risk states: 63 • All negative for CSF 15
  16. 16. Safeguarding Animal Health Swine Health Protection Act FY2011 16 • 1,394 licensed premises  653 in PR • Inspections of licensed premises  6,445 premise inspections  956 temperature checks  69 violations • 33,452 searches for non-licensed feeders • 75 non-licensed feeders found
  17. 17. Safeguarding Animal Health 17 August 2011
  18. 18. Safeguarding Animal Health Swine Influenza Virus Surveillance • Swine are susceptible to influenza viruses from swine, avian, and humans. • Influenza viruses are constantly changing and it’s possible for two viruses to swap genes if a “host” is infected with more than one influenza virus at the same time. • This increasing genetic diversity has complicated diagnosis and control in swine populations. • The flu viruses found in swine do not normally infect humans. However, sporadic human infections with variant influenza viruses have occurred. 18
  19. 19. Safeguarding Animal Health Swine Influenza Virus Surveillance • Objectives  Monitor genetic evolution and ecology  Provide isolates for research activities  Provide isolates for progressive development of  Diagnostic reagents  Diagnostic assays  Vaccine products 19
  20. 20. Safeguarding Animal Health Swine Influenza Virus Surveillance • Surveillance streams  Case compatible accessions to diagnostic laboratories  First point of contact or commingling events  Swine linked to a human case of variant influenza 20
  21. 21. Safeguarding Animal Health 21 0 50 100 150 200 250 Oct-09 Nov-09 Dec-09 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Accessions Positive Accessions VI Positives pN1 Positive Accessions Subtyped Accessions USDA SIV Surveillance Program Isolation and Characterization Activities - 10/1/2009-1/31/2012 6855 Samples (not graphed) 2733 Accessions 1059 Positive Accessions 561 Accessions with viral isolates 171 Accessions - pN1 gene 469 Accessions subtyped
  22. 22. Safeguarding Animal Health 22
  23. 23. Safeguarding Animal Health SIV Sequencing through 12/31/2011 •8 genes sequenced (full genome): 12 isolates •3 genes sequenced (H,N,M): 160 isolates •<3 genes sequenced: 75 isolates •Sequenced, not yet reported: 382 isolates 23 Sequencing necessary to meet epidemiology, vaccine decision- making, and diagnostic objectives, due to large variations in SIV genomes within subtypes.
  24. 24. Safeguarding Animal Health Conclusion • Change  Surveillance is changing to focus on surveillance stream vs. disease  PRV/SB concept paper will soon be available for comment • Surveillance activities will continue to evolve and become more comprehensive 24
  25. 25. Safeguarding Animal Health Questions? 25