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Related Experiment Videos

Mastitis control practices: differences between herds with high and low milk somatic cell counts.

C T Hutton1, L K Fox, D D Hancock

  • 1Department of Veterinary Clinical Medicine and Surgery, Washington State University, Pullman 99164-6610.

Journal of Dairy Science
|April 1, 1990
PubMed
Summary

Effective mastitis control in dairy herds involves specific management strategies. Subtle differences in practices, like milking order and teat disinfection, significantly impact herd somatic cell count (SCC).

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Area of Science:

  • Veterinary Medicine
  • Animal Science
  • Dairy Management

Background:

  • High somatic cell count (SCC) in dairy herds is a significant indicator of mastitis, impacting milk quality and herd health.
  • Effective mastitis control management is crucial for maintaining low herd average SCC.

Purpose of the Study:

  • To investigate the effects of differences in herd mastitis control management on maintaining low herd average SCC.
  • To identify specific management practices that differentiate herds with low SCC from those with high SCC.

Main Methods:

  • Studied Washington State DHI Holstein herds (n=309) enrolled in the SCC program.
  • Ranked herds based on the percentage of cows with SCC ≤ 283,000 cells/ml, identifying "low herds" (n=28) and "high herds" (n=31).
  • Conducted annual herd visits for 2 years, collecting samples and recording data on management practices.

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Main Results:

  • Geometric mean bulk tank SCC was 175,000 cells/ml for low herds and 460,000 cells/ml for high herds.
  • Milking hygiene, teat dipping, and dry cow therapy were practiced similarly in both groups.
  • Low SCC herds more frequently milked highest producers first and clinical cows last, used automatic detachers, maintained lower bedding moisture, and disinfected teats before antibiotic treatment.
  • Managers of low SCC herds were more likely to use computers and attend dairy informational meetings.

Conclusions:

  • Subtle differences in mastitis control strategies, rather than routine practices, differentiate low and high SCC herds.
  • Specific management choices, including milking order, equipment use, bedding management, and adherence to treatment protocols, are key to reducing herd SCC.