Parasite density was the principal predictor of the cytokine levels, as parasitemia positively associated with IL‐10, GM‐CSF, IL‐6, IL‐1β, IFN‐ɣ, and TNF‐α, but negatively associated with IL‐3 and TGF‐β. This evidence concerns the gene TGFB1 and parasitic infectious disease.