This study was undertaken to estimate tissue specific activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatese (ALP), lactate dehydrogenase (LDH), and creatine kinase (CK) in turkey. Tissue samples of liver, kidney, heart, brain, lung, proventriculus, duodenum, and breast muscle breast were collected from freshly killed adult male turkeys. The present study results reveal the presence of all five enzymes activities in studied tissues, although in different quantities. The highest specific activity of the AST and ALT was observed in the liver followed by the kidney, with statistically significant difference between them. The lowest specific activity of both AST and ALT was observed in the lungs. The specific activities of ALP were significantly higher in renal and duodenal tissues of turkey. The lowest ALP levels were seen in brain, lung, proventriculus, and muscle, with no statistically significant difference among them. Highest LDH and CK activities were observed in heart and muscle and their lowest specific activities were found in duodenum and proventriculus, with no statistically significant difference between them. Since each tissue has its characteristic complement of enzymes, such information might provide valuable data for clinical and diagnostic purposes in avian veterinary medicine. However, there is a need for further documentation of the clinical enzymology findings and also sensitivities and specificities of such tests in turkeys and other avian species.

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