This is mild elevation in the liver enzymes. Before jumping to any conclusions, I would repeat these tests off alcohol - since this is the most obvious cause.
In addition to being screened for hepatitis C and HIV, I would also consider tests for hepatitis A and B. A liver ultrasound can also be considered to rule out any masses or fatty liver (which can be associated with alcohol consumption).
If these tests are negative, and the enzymes remain elevated, then more specilized tests for Wilson's disease and hemochromatosis can be considered.
Although a liver biopsy is the most comprehensive test, this is typically reserved for patients with greater than twofold elevations in the AST and ALT.
Again, I would repeat these tests in a few weeks off alcohol.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.