Changes in selected serum biochemical and EKG values with age in cynomolgus macaques

Normal serum values for alkaline phosphatase were significantly higher in juvenile male cynomolgus monkeys compared to adults. Conversely, blood urea nitrogen (BUN) was significantly lower in juveniles than adults. A comparison of selected EKG parameters from each group revealed no significant differences; however, there was a trend towards mean left axis deviation in adult animals.