| Johne's Disease Program |
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| Johne's testing options |
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Serum ELISA
The ELISA test detects 85% of moderate-to-high shedding animals. It detects a proportionally lower percentage of low shedding animals.
The ELISA misses up to 15% of moderate-to-high shedders.
When the ELISA test is used in conjunction with effective management the outcome is a significantly reduced level of infection within a herd. The ELISA test results are available within one week. The ELISA test is most effective when used regularly in a dry cow testing regime. The fee is $13.00 for the first test, then $4.50 for each additional test up to 10 samples, then $4.00 for each additional test over 10 samples.
Fecal culture
The fecal culture is more sensitive than the ELISA. The culture test can detect all moderate-to-high shedding animals.
The culture test detects a greater percentage of low shedding animals than the ELISA.
Very low counts (1 or 2 colony forming units) may be due to pass through:
1/3 will show increased shedding and eventually become clinical
1/3 continue to shed very low levels of organism
1/3 may not culture positive again
The fecal culture test requires six weeks to detect high shedders and 12 weeks to receive full results.
The culture test is effective in vaccinated herds.
The fecal culture test may be a desirable method in herds that are not seeing enough progress with ELISA testing, or in herds that are close to eradication.
In herds with low prevalence of Johne's (<10% culture positive), pooling may be considered to reduce cost.
The fecal culture test should be most effective when used regularly in a pre-dry test regime.
The fee is $12 per test.
Fecal real time PCR -
A rapid tool for detecting high shedders.
Results available within one week
Effective in vaccinated herds.
Should be most effective when used regularly in a dry cow testing regime.
$45 first test, then $12.00 each additional test.
For further information regarding Johne's testing options
Bruce Mueller, ODA field veterinarian
503-986-4685
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| Testing through ODA |
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USDA funding has been reduced to 10 percent of 2006 levels. With this limited funding, ODA will offer the following options to Oregon cattle producers.
Johne's subsidized testing (at cost of test materials)
- Participants must have a current Risk Assessment and Management Plan
- All test results are confidential
- Tests are available as follows:
- Blood ELISA: $2.75/test
- Fecal culture: $10.00/test
- Fecal PCR: $15 test (requires 30 or more head for this price)
Risk assessments and management plans
- Contact your private practitioner or ODA to conduct a risk assessment and prepare a management plan. This assessment and plan provides as effective means of dealing with Johne's and all other fecal borne diseases.
- There are 150 Oregon dairy herds enrolled in the Johne's Management Program.
Johne's status herds
- There are twenty herds in the Johne's Test Negative program and more herds applying.
- If you want to participate, call 503-986-4680, for a free level one qualifying test.
Johne's program questions
- Contact your herd veterinarian
- Bruce Mueller, field veterinarian for the Oregon Department of Agriculture -503- 986-4680
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| 2008 management update |
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With approximately 150 participating herds, well over 30,000 animals tested annually and 19 Johne’s status herds, Oregon continues to achieve a nationally recognized Johne’s program. This work is accomplished through the cooperative efforts of dairy farmers, creameries, private veterinarians, Dairy Farmers of Oregon, OSU Extension, the United States Department of Agriculture and the Oregon Department of Agriculture.
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| Johne's status herds |
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The following herds are enrolled in the Johne’s status program in the state of Oregon. These herds have tested negative for Johne’s, have up-to-date risk assessments and management plans, and have requested to make their Johne’s status public.
Negative results on annual herd tests increase herd status levels.
Level four: (99 percent confident of having a non-infected herd)
Mistvale Farms, The Fletchers
| Buz Gibson, Lockmead Dairy
| The Johnstons, Spring Valley Farm
| | Oregon State University Dairy | Jack Perrin
| Dean and Patty Tohl
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Level three: (98 percent confident of having a non-infected herd)
Level two: (95 percent confident of having a non-infected herd)
Tim Jenck
| John and Gloria Lekerkerker
| | River Bend Jerseys, The Mahaffy's | Bill Mast
| Lynne & Randall Miller (testing pending for level three)
| | Rocha Jerseys | | Sun Valley Jerseys, The Seals | Milky Way Dairy, The Williamsons
| | Mission Lane Farm, The Zielinskis |
Level One: (85% confident of having a non-infected herd)
Little River Jerseys, The Heathershaws
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Level A: (achieved whole herd negative test)
Dan Leuthold*
| The Mann's, Mann's Guernsey Dairy*
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* Both of these are vaccinated herds. By USDA rules these herds are not eligible for higher than level A status.
Johne's status of a herd and herd health management practices are important considerations when purchasing breeding stock.
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