a, ELISA analysis depicting TTR-specific antibody cross-reactivity profile to multiple TTR proteins. MAb 12D4, a human IgE mAb specific for WbSXP-1, served as negative control. OD, optical density. b, Proportion of filaria-specific antibodies binding different antigens. c, Binary heatmap showing presence (red) or absence (black) of antibody in indicated patient sera against filarial antigens tested in immunoblot analysis. Two serum samples (284 and 245) from respective mold- and shellfish-allergic patients served as negative controls.