Factors Affecting the Relationship Between Electronic and Microscopic Cell Counts in Bovine Milk

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Abstract
Four hundred and seventy samples of milk were examined to determine the influ- ence of filtration, agitation, cooling, and storage on the relationship of the micro- scopic to the electronic count, and on the concentration of the somatic cells. Counts ranged from 73,000 to five million per milli- liter. Neither the somatic cell concentration nor the regression of microscopic on elec- tronic cell counts was significantly influ- enced by the aforementioned factors. Vari- ation in the regression of microscopic on electronic cell counts was due to differences in the somatic cell concentration of the sample. The regression coefficient in 388 samples with mean cells greater than 300,000 per milliliter was 1.45 and 0.98 in 82 samples with lower cell counts.