GPT and dengue disease: In the dengue group, AST and ALT levels began to increase slightly in the early febrile period: median (90% range) of 43 IU/L (18–314 IU/L) for AST levels and 40 IU/L (14–236 IU/L) for ALT levels compared with 24 IU/L (13–68 IU/L) for AST levels and 32 IU/L (13–101 IU/L) for ALT levels at follow-up (P < 0.001 for AST and P = 0.02 for ALT, by Wilcoxon signed-rank test).