Dr. Bret Marsh - Bovine Tuberculosis: Indiana’s Progress Report
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Bovine Tuberculosis: Indiana’s Progress Report - Dr. Bret Marsh, State Veterinarian, Indiana State Board of Animal Health, from the 2017 NIAA Annual Conference, U.S. Animal Agriculture's Future Role In World Food Production - Obstacles & Opportunities, April 4 - 6, Columbus, OH, USA. More presentations at http://www.trufflemedia.com/agmedia/conference/2017_niaa_us_animal_ag_future_role_world_food_production
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Dr. Bret Marsh - Bovine Tuberculosis: Indiana’s Progress Report
- 1. Bovine TB: Indiana’sBovine TB: Indiana’s Progress ReportProgress Report Bret D. Marsh, D.V.M.Bret D. Marsh, D.V.M. Indiana State VeterinarianIndiana State Veterinarian Indiana State Board of Animal HealthIndiana State Board of Animal Health
- 2. Recent TB Traces to SE INRecent TB Traces to SE IN 2008: Single beef cow trace • No other positives 2009: Cervid herd, infected • Herd depopulated 2010: Two beef traces from PA • Genetically linked to 2011 herd 2011: Beef herd, infected • Investigation complete
- 3. 2016: Index Herd (#1)2016: Index Herd (#1) Positives at slaughter • One herd on two sites • Whole-herd testing identified more • Herd depopulation complete • Launched 3-mi circle testing
- 4. Proximity:Proximity: Bovine TB EventsBovine TB Events w/ 10-mi Buffersw/ 10-mi Buffers 2008-20162008-2016
- 5. Hunter-harvestedHunter-harvested White-tailed DeerWhite-tailed Deer Tested 2009-2015Tested 2009-2015 Q=486Q=486
- 6. 2016: Wild Deer Diagnosis2016: Wild Deer Diagnosis Positive 2-year-old white-tailed doe • Culled from index farm • First wild case in Indiana • Test area from 3 miles to 10 miles Positive raccoon collected
- 7. ExpandedExpanded Testing Area:Testing Area: 10-mi circle10-mi circle ++ Whitewater RiverWhitewater River CorridorCorridor 2-mi buffer2-mi buffer
- 8. Producer Outreach • Public Meetings • Door-to-Door Visits • Telephone Calls • Animal Health Advisories • Email & USPS Mail
- 11. Surveillance Logistics • Staging Area at Franklin Co Fairgrounds • Private Practitioner Testing • Department of Correction Offenders • Federal Testing Teams
- 14. 2016: Positive Herd #22016: Positive Herd #2 December: Surveillance testing •Beef cattle herd tested positive •Within 10-mi testing zone • All nearby herds (within 3 mi) already tested negative •Trace investigations underway
- 19. Cattle Testing StatusCattle Testing Status Circle & Corridor Surveillance •380 test-eligible herds • 376 tested + 2 scheduled = 378 (99%) • Total of 6,490 head • 2 left to test Trace Investigations •Ongoing for second herd
- 20. Cattle: What’s Next?Cattle: What’s Next? • Test remaining cattle herds • Continue traces for 2nd herd • Develop plan for future area testing
- 21. Cervid LesionCervid Lesion Cattle LesionCattle Lesion
- 22. More Info…More Info… www.in.gov/boah BOAH Central Office Contact: Jean Doerflein jdoerflein@boah.in.gov 317-544-2387
Editor's Notes
- Historically, bovine tuberculosis has been found in Southeastern Indiana four times since 2008. Each of these incidents were traced—in and out—and no connections or spread were found. Fast-forward to 2016, genetic testing that is now available revealed that all of these cases are genetically linked. The most interesting of these was a confirmation that the 2010 case (traces from a PA slaughter plant) originated from the herd identified in 2011. We were unable to confirm a connection at the time. All of these are related to the case identified in 2016.
- In April, the Indiana State Board of Animal Health was notified of a TB trace for six animals that tested positive for bovine tuberculosis. They originated from a beef herd in Franklin County, IN. (This was a single herd that was kept on two different sites.) The whole-herd test revealed more infection. Herd was depopulated. This finding launched an effort to test other herds in the area, within a 3-mile circle.
- This map shows the proximity of all cases of bovine TB in the region. Farm A was the 2008 case. B was the 2009 cervid farm. Farm C was the 2010 and 2011 investigations. Farm D is the latest, 2016, herd identified. All were in fairly close proximity, especially when you see an overlay with 10-mile circles.
- After the 2008 discovery, BOAH has worked with the Indiana Department of Natural Resources to test hunter-harvested white-tailed deer in the area. When we look at the two locations of the 2016 infected herd with a 10-mile circle, you can see that between 2009 and 2015, nearly 500 white-tailed deer were tested in the area.