While in the HF B. atrox snakebite group, it is possible to observe a predominance of a chemotactic process with positive and negative, moderate, and strong correlations between chemokines (CXCL-8, CXCL-9, CCL-2, and CXCL-10), both among these molecules as with cytokines (IL-10, IL-6, IFN-γ, IL-4, and IL-17A), with a more polarized profile for Th2 response (IL-4). The gene discussed is CCL2; the disease is hydrops fetalis.