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Monitoring udder health using somatic cell counts

Questions belonging to the abstract "Monitoring udder health using somatic cell counts"

1. How is a ‘new infection’ defined using somatic cell count data ?

 a. Any increase in somatic cell count from one test day to the next.
 b. A somatic cell count that is greater than 250,000 at the last test day.
 c. An increase in somatic cell count from less than 250,000 at the previous test day to over 250,000 at the most recent test day.

 

2. What is a reasonable goal for new infections when measured with cell counts ?

 a. < 2%
 b. < 10%
 c. < 15%

 

3. Which of the following factors is associated with new infections ?

 a. Culling policy
 b. Herd treatment protocol
 c. Milking procedures