Analysis of the alanine aminotransferase levels in the 23 confirmed hepatitis A cases showed a mean of 2340.1 ± 1091.5 IU/l and the levels ranged from >3000 IU/l (n = 5), 2001–3000 IU/l (n = 9), 1000–2000 IU/l (n = 6) to <1000 IU/l (n = 2). Here, GPT is linked to hepatitis A virus infection.