Lesser kudus (Tragelaphus imberbis) have been kept in Zoo Basel since 1956. Juvenile mortality used to be high, and a recent study to reveal pathologic findings identified white muscle disease as a major contributor to this problem. Therefore, a retrospective study was initiated using 16 stored serum samples from lesser kudus from 2000 to 2013 to determine the concentration of selected trace elements, including selenium, copper, zinc, and iodine. Additionally, three serum samples were used to measure serum vitamin E values. Serum analysis revealed that copper, zinc, and iodine values were within reference ranges for domestic ruminants, and the supplementation status of these trace elements was assumed to be adequate. In contrast, vitamin E levels were low and selenium levels were scarce in several animals, indicating a deficiency of these essential micronutrients. The results of the analyses are compared with literature references.
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