تخمین میانگین ملی تعداد سلولهای سوماتیک شیر وافت تولید ناشی از ورم پستان تحت بالینی در گله های شیری صنعتی ایران

U sing the database of the Animal Breeding Center ofIran and based on the eligible test-day data from 78969 cows in five provinces: Tehran (with 44129 cows), Ghazvin (6668), Zanjan (1767), Isfahan (7572), Khorasan-e-Razavi (14521) and others (4312) the averages of 426850 ± 966840 and 473860 ± 605330 cells/ml of milk somatic cell count (SCC) was calculated for individual cows and herds respectively. A Pearson's correlation coefficient of -0.174 revealed a highly significant negative correlation between test-day milk production and SCC (p