Impact of Subclinical Mastitis-causing Bacterial Species on the Composition and Chemical Properties of Milk

Background: Here we investigate whether the composition and some chemical properties of milk can correlate with bacterial species causing subclinical mastitis in cows. Methods: One hundred eighty cows were used study. The California Mastitis Test (CMT) was applied to selected divided into four groups: negative CMT (n = 45), Escherichia coli Streptococcus agalactiae 45) Staphylococcus aureus groups. Result: Milk measured. highest fat ratio (5.82±0.34%) found group (p less than 0.05). proportions solid-non-fat (9.67±0.09%), protein (3.51±0.03%), lactose (5.29±05%) mineral matter (0.75±0.01%) lowest electrical conductivity CMT-negative (4.23±0.02 mS/cm), while had value (4.61±0.02 mS/cm) specific gravity lower (1,034.91±0.56 kg/m3) (1,034.24±0.65 groups Based on our findings, propose that parameters are altered mastitis. However, these could not be standardized according responsible species. We recommend monitored regularly dairy farms.