1. 1 Materials reviewed by National Johne's Working Group / Johne's Disease Committee / USAHA 2003 Control of Johne's Disease in Beef Herds Don Hansen DVM MPVM College of Veterinary Medicine Oregon State University

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3. 3 1. Maternity/Newborn BREAK THE JOHNE’S CYCLE Build up barriers to infection BREAK THE JOHNE’S CYCLE 5.Colostrum and milk 4.Infection 2. Direct Contact 3. Feed and water Graphic design by C A Rossiter Burhans/B J Tefft

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5. 5 General Control Points for Beef Herds 1Strategy Prevent ingestion of MAP Reduce contamination from and number of infected animals 2Methods Animal density and manure management Test and remove (or manage) Use Critical Management Practices (CMPs) Don Hansen, Oregon State University

6. 6 Critical Management Points for Control 1. Manure management All manure is guilty “All manure is guilty” 2.Colostrum and milk management 3.Management of infected animals 4.Management of replacements 5.Develop management plan Christine Rossiter Burhans

7. 7 Critical Management Practices for manure handling 1.Reduce exposure of newborns to MAP in maternity area Keep area clean and dry as possible Keep cow density low, avoid overcrowding Move new pairs to clean, low animal density pasture as soon as possible after birth Keep high risk cows out of area Don Hansen, Oregon State University

8. 8 Manure handling continued…. 2.Provide clean feed for young stock Limit manure contamination of feed by using bunks or hay racks Forage crops that have had a fresh manure application may be risk to young stock Don Hansen, Oregon State University

9. 9 Manure handling continued…. 3.Provide clean water for young stock Use water troughs and restricting panels to limit access to ponds or creeks Divert manure runoff from water sources Don Hansen, Oregon State University

10. 10 Manure handling continued….. 4.Keep mature animal manure from reaching weaned young stock Raise weaned young stock in separate area Or, provide solid barrier between mature and young stock Prevent MAP transportation by people, equipment, etc Don Hansen, Oregon State University

11. 11 Critical Management for low-risk colostrum supplementation 1.Use healthy cows, with recent negative test results Clean udder and teats before collecting Save extra for others 2.Artificial colostrum supplements Not likely contaminated with MAP Don Hansen, Oregon State University

12. 12 Critical Management for clinical cases 1.Identify and “remove” clinical and late stage cases immediately Watch for clinical signs Isolate from herd and confirm diagnosis Keep them out of maternity areas Consider removing their newest offspring Don Hansen, Oregon State University

13. 13 Critical Management for subclinical animals 2.Identify and manage subclinical cases Use tests to identify subclinical animals  Sample collection coincides with other management activities like preg-checking Manage herd to reduce disease spread  Manage cow density in maternity area  Raise weaned animals separate from cow herd Don Hansen, Oregon State University

14. 14 Critical Management for replacement animals 3.Know risks for disease from herd additions Check risk for diseases like Johne’s, BVD, Salmonellosis, Crypto, etc.. Pre-testing source herd better than individuals  Testing heifers for JD may waste $$$ ? New additions may require further testing after purchase Don Hansen, Oregon State University

15. 15 Critical Management Practices for Prevention and Control Plans (as outlined in the manual) The manual is designed to guide users through a thorough risk assessment and development of an animals disease control plan Don Hansen, Oregon State University

16. 16 The Steps in the Process Define objectives and goals Define operation parameters Assess existing JD problem Assess risks for transmission Discuss management options Discuss testing options Define JD immediate and long-term objectives Don Hansen, Oregon State University

17. 17 GET JOHNE’S OUT MAKE A PLAN ! Don Hansen, Oregon State University

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