Differences in the occurrence of selenium, copper and zinc deficiencies in dairy cows, calves, heifers and bulls
Pavlata, L.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Klinika Chorob Prezvykavcu)E-mail:[email protected] | Podhorsky, A. | Pechova, A. | Chomat, P.
Blood samples were collected on 20 farms in various regions of the Czech Republic to diagnose Se, Cu and Zn status of dairy cows, calves, heifers and bulls. Cu and Zn concentrations were determined by flame AAS, Se status assessment was based on the glutathione peroxidase (GSH-Px) activity in whole blood. Dairy cows and calves showed the higher GSH-Px activity in comparison with heifers and bulls (P less than 0.001). Se deficiency was diagnosed in 23% of the studied dairy cows, 31% of calves, 51% of heifers and 58% of bulls. Dairy cows showed lower Zn and higher Cu concentrations than other categories (P less than 0.001). Zn deficiency was diagnosed in 41% of the examined dairy cows, 13% of bulls, 9% of calves and 1% of heifers. Cu deficiency was diagnosed in 28% of dairy cows, 70% of calves, 65% of heifers and 70% of bulls. Deficiency of at least one of the microelements monitored was diagnosed on all investigated farms.
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