“…However, the cell counts of milk from cows with SCM can reach a few million cells per millilitre and usually range from 200,000 to 500,000 cells/ml (Guan, Wu, Xu, Su, & Hu, 2017;Smith, 1996;Sun et al, 2017). Milk from cows with clinical mastitis (CM) generally contains >500,000 cells/ml (Guan et al, 2017;Smith, 1996;Sun et al, 2017). N-acetyl-β-D-glucosaminidase is used to measure cell damage, which is closely correlated with SCC and can be used to diagnose mammary gland infection (Guan et al, 2017;Hovinen et al, 2016;Williams, Marschke, Nottingham, & Kitchen, 1991).…”