Akademik Veri Yönetim Sistemi
Etlik Veteriner Mikrobiyoloji Dergisi, cilt.31, sa.2, ss.115-120, 2020 (Hakemli Dergi)
This study aimed to investigate the effects of ear-tagging on blood malondialdehyde (MDA), reduced glutathione (rGSH), Vitamin C (Vit C) levels, and glutathione peroxidase (GPx) activity in the acute period. Ear-tagged (with polyurethane ear-tag) animals consisted of nine healthy Holstein calves (2-3 months old). Blood samples were taken just before ear-tagging (baseline), at the 20th min, on the 3rd day, and 8th day after the ear-tagging procedure. Six Holstein calves were involved the sham group. In ear-tagged animals, plasma MDA levels increased on the 3rdday compared to baseline values (p<0.01) and returned to baseline values on the 8th day, whereas no change was found in the sham group. In ear-tagged animals, plasma rGSH levels increased at the 20th min, 3rd day, and 8th day (p<0.001) in comparison to baseline values, which in the sham group, there was no change. In ear-tagged animals, erythrocyte rGSH levels on the 3rd and 8th days were higher compared to baseline and 20th min level (p<0.01). In the sham group, the 3rd and 8th day erythrocyte rGSH levels increased compared to baseline values (p<0.01). In ear-tagged animals, the 20th min, 3rd day, and 8th day erythrocyte GPx activities were lower than the baseline values (p<0.001), whereas in the sham group, no change was observed. While Vit C levels increased progressively in the sham group (p<0.05), this increase was not observed in the ear-tagged group. In conclusion, ear-tagging was found to cause oxidative stress and increase antioxidant requirement in calves.