Abstract
Left abomasal displacement (LAD) is a major disorder occurring in the postpartum period and causes confusion with metabolic diseases in high producing dairy cattle. Surgical correction of abomasal displacement is the most reliable method of treatment. This study aimed to evaluated some hematological and biochemical parameters before and after right omentopexy correction of LAD as well as evaluation of short and long term outcomes after surgery. The study included 85 lactating dairy cows (Holstein-Friesian) with LAD treated surgically with right omentopexy technique (LAD group) and 20 healthy dairy cows at 2-6 week postpartum (control group). In LAD group, the blood samples were collected before surgery (d0), after 3 days (d3) and 7 days (d7) post-surgery. Each sample was analyzed for complete blood count (CBC), serum total protein (TP), albumin (AL), globulin (GL), triglycerides (TG), cholesterol (CL), hepatic enzymes (AST, ALT, GGT), Alkaline Phosphatase (AP), C-reactive protein (CRP) and serum electrolytes as Na and K using commercial available test kits. There were significant hemoconcentration, anemia, and leukopenia with neutropenia in d0 in comparison to control group. Furthermore, there were hypoalbuminemia, hyperglobulinemia, significant decrease in serum triglycerides and cholesterol concentrations in cows at d0. There was significant increase in ALT, AST, GGT, AP and CRP while there were hypokalemia and hyponatremia in cows with LAD at d0. Hematological, biochemical, hepatic function alterations, and inflammatory reaction in LAD cows were relieved after 3 days of surgical correction indicating that these cows were restoring their baseline physiological status and all cows were cured after one week of operation without any incisional complications (short term outcomes). The long term outcomes was also impressive as 94.1% were still alive in a good health condition without recurrent abomasal displacement, and 60% was confirmed to be pregnant within first three months follow up after surgical correction.

Key words: Abomasal displacement, biochemical parameters, dairy cattle, hematological parameters, right omentopexy correction