IL6 and infection: In contrast, the liver load of IL-6 Tg-PbANKA/LISP2 parasites remained low over the course of infection, except at the 48-h time point, when the amount of IL-6 Tg-PbANKA/LISP2 parasites rose but at levels significantly lower than those obtained for WT PbANKA parasites.