Evaluation of Oxidative Status and Thiol-Disulfide Homeostasis in Cows with Subclinical Hypocalcemia

This study aimed to investigate the effects of subclinical hypocalcemia (SCH), identified on the 10th day postpartum in dairy cows, on serum levels of energy metabolites glucose, triglycerides, and cholesterol, liver enzymes aspartate aminotransferase (AST) and alanine aminotransferase (ALT), minerals calcium (Ca), phosphorus (P), and magnesium (Mg), and oxidative stress markers total thiol (TTHIOL), native thiol (NTHIOL), total oxidant status (TOS), and total antioxidant status (TAS). The study material consisted of 23 cows with SCH, which were clinically healthy but had serum calcium levels 8.5 mg/dL. Serum concentrations of AST, ALT, glucose, triglycerides, cholesterol, Mg, P, and Ca were measured using an autoanalyzer, while TAS, TOS, NTHIOL, and TTHIOL levels were determined spectrophotometrically. Serum Ca concentration was found to be significantly (p