Secreted protein which suppresses the host allergic response by inhibiting the interaction of host IL33 with its receptor in order to maintain parasitic infection (PubMed:29045903). Binds to both host IL33 and host nuclear DNA and this dual binding blocks the interaction of IL33 with its receptor, and tethers IL33 within necrotic cells, preventing its release, and blocking allergic response initiation (PubMed:29045903). Interacts with mouse IL33 (in reduced form).