Aim: This study aimed to describe the clinicopathological and necropsy findings in neonatal dairy calves affected with right torsion of the abomasum. Materials and Methods: The history and findings of clinical examination, hematology and serum biochemical analyses and necropsy were described in six neonatal Holstein calves with a confirmed diagnosis of right torsion of the abomasum. Furthermore, a review of the literature was carried out using internet search engines such as PubMed and Google Scholar concerning abomasal displacement in calves. Only published papers in scientific and refereed journals were reviewed. Results: Six neonatal Holstein calves (four females and two males) aged between 7 and 21 days were diagnosed with right torsion of the abomasum during necropsy. The calves were presented with peracute signs of anorexia, dehydration, abdominal pain, and abdominal distension. Hematology and serum biochemical analyses revealed hemoconcentration and azotemia, hyponatremia, hypochloremia, and hypokalemia. Conclusion: Abomasal torsion in neonatal calves must be placed on the deferential diagnostic list of calves suffering from peracute signs of abdominal pain and distension. Although the underlying etiopathological factors are not fully known, correction of nutritional mismanagement is required to prevent the condition.

This study was conducted to determine the serum and milk levels of thiobarbturic acid-reactive substances (TBARS), nitric oxide (NO), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), vitamin E and selenium, IL-4 and IL-6 in lactating dairy cows affected with bloody milk using commercially available ELISA kits. Milk and whole blood samples were collected from 60 cows affected with bloody milk and 20 apparently healthy cows for control. In the serum, levels of GSH-Px and SOD were significantly (p˂0.05) higher in healthy cows compared to cows affected with bloody milk while the levels of TBARS and NO were significantly (p˂0.05) higher in affected cows. In the milk, levels of SOD, TBARS and NO were significantly (p˂0.05) higher in affected cows. In the serum, levels of vitamin E were significantly (p˂0.05) lower in affected cows compared to healthy cows, while no significant changes were observed in the levels of this vitamin in the milk between healthy and affected cows. In the serum, levels of selenium were significantly (p˂0.05) lower in affected cows while in milk, selenium levels were significantly (p˂0.05) higher in affected cows compared to healthy ones. Levels of IL-4 were significantly (p˂0.05) lower in the serum and milk of affected cows compared to healthy cows while levels of IL-6 were significantly (p˂0.05) higher in both serum and milk of affected cows. Results of this study suggest a possible role of oxidative stress in the pathogenesis of bloody milk in dairy cows.