The activities of enzymes of clinical significance and the concentrations of certain electrolytes, minerals and blood constituents were determined in sera of she-camels, cows and ewes. The activities of creatine kinase, lactate dehydrogenase, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and gamm-glutamyltransferase were measured. The concentrations of sodium, potassium, chloride, magnesium, calcium, inorganic phosphorus, iron, glucose, cholesterol, triglycerides, urea, creatinine, total protein and albumin were determined. Means were compared by performing Duncon`s Multiple Range Test. The results were compared with those reported by other investigators in camels, cattle and sheep.