GPT and infection: Since the parasitemia of the bpV(phen)-treated IL-10KO mice was similar to the bpV(phen)-treated WT mice when they died (days 9 to 12 post-infection), we examined whether IL-10 was involved in controlling liver injury by measuring the serum levels of alanine transaminase (ALT) and aspartate transaminase (AST) (Fig. 4a and b).