| Sumario: | Investigates the influence of age and sex on the serum concentrations of total protein(TP), immunoglobulin(LG), blood urea nitrogen(BUN), aspartate aminotransferase(AST), and alanine amino-transferase(ALT) in apparently healthy sheep raised on the Ethiopian highlands; the results shows that males had significantly (P<0.05) higher TP concentrations than females, that one to two-months-old sheep had significantly lower TP (P<0.05) and lg (P<0.01) concentrations than other age groups. In sheep above 4 months of age, males had significantly (P<0.01) higher lg concentrations than females. Neither age nor sex significantly (P>0.05) effect on AST and ALT concentrations. These findings may aid the interpretation of values of the studied parameters which are obained during the process of clinical diagnosis.
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