Th2/Th1 ratios, as well as IL-4/IFN-γ and IL-10/IFN-γ, were also calculated; significantly higher IL-4/IFN-γ ratios were obtained in children with moderate-to-heavy infections by A. lumbricoides (0.020 [0.010–0.042]), compared to those without (0.011 [0.08–0.014]) or light infections (0.007 [0.002–0.022]) (p = 0.046 and p = 0.021, resp). This evidence concerns the gene IL4 and infection.