1 / 14

Consequence of changing standards for somatic cell count on US Dairy Herd Improvement herds

Consequence of changing standards for somatic cell count on US Dairy Herd Improvement herds. Abstr . 352. U.S. milk quality measures. Bulk tank somatic cell count (BT-SCC) Monitored by USDA Data from 4 of 10 Federal Milk Orders (FMO) Accounts for nearly 50% of U.S. milk supply

lucus
Download Presentation

Consequence of changing standards for somatic cell count on US Dairy Herd Improvement herds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Consequence of changing standards for somatic cell count on US Dairy Herd Improvement herds Abstr. 352

  2. U.S. milk quality measures • Bulk tank somatic cell count (BT-SCC) • Monitored by USDA • Data from 4 of 10 Federal Milk Orders (FMO) • Accounts for nearly 50% of U.S. milk supply • Herd test-day somatic cell count (TD-SCC) • Herds in DHI • Accounts for 94% of U.S. DHI herds

  3. U.S. DHI TD SCC (all breeds)

  4. BT-SCC limits

  5. U.S. versus E.U. SCC monitoring Program characteristic U.S. E.U. SCC sample Individual farm Individual farm BT-SCC limit 750K cells/mL 400K cells/mL Value used Consecutive monthly BT-SCC Geometric mean of 3 monthly BT-SCC Producer suspension 3 of 5 consecutive samples over limit 4 consecutive 3-month means over limit

  6. Export concerns • E.U. change in SCC sampling point from bulk truck or plant silo to individual farm • 3-month mean (E.U.) used as single reference for period, which allows more time to reduce future SCC • Geometric mean (E.U.) mathematically lower than arithmetic mean (U.S.) and requires recalculation

  7. SCC noncompliance comparison • Current E.U. and U.S. SCC standards as well as 3 NMPF proposed standards • Percentage of herds • Percentage of milk supply • Examined by month and herd size

  8. Data • SCS converted to SCC for 14,854 DHI herds • Herd requirements • 15–26 tests (Jan. 2009 – Oct. 2010) • ≥10 cows for all test days • Herd TD-SCC used as proxy for BT-SCC • Each cow SCC weighted by her TD milk yield

  9. SCC herd noncompliance – month

  10. SCC milk noncompliance – month

  11. SCC noncompliance – means* *November 2009 – October 2010

  12. SCC herd noncompliance – herd size

  13. Conclusions • E.U. changes in SCC enforcement led to reconsideration of stricter U.S. standards • If 400K U.S. SCC limits were used, noncompliance would be higher than if current E.U. standard was applied • For U.S. producers to meet stricter SCC standards, sound management and culling for milk quality need to be emphasized

  14. Opinion • There has been a surprisingly large decline in SCC in the U.S. and we believe it’s because of the required payment for quality (on SCC) in 4 FMO plus other voluntary incentives in the other markets. • We hope that whatever regulations are enacted in the future will not disrupt the success of the SCC incentives that seems to be working.

More Related