“…Plasma biochemistry assays are compared with methods of diagnostic imaging and histopathologic examinations of tissue samples obtained by liver biopsy (Divers and Cooper 2000). The plasma activities of ALP, ALT and AST can all rise during liver disease, aspartate aminotransferase elevation seems to be of clinical importance (Divers et al 1996;Divers and Cooper 2000), too. The plasma activities of ALP, ALT, AST and concentration of cholesterol in tortoises from this study are all in the normal range for healthy Russian tortoises, as have been published previously (Knotek et al 1999;Knotek et al 2001).…”