In summary, the identification of T. spiralis circulating proteins provided several additional diagnostic candidates such as long-chain fatty acid transport protein 1 (for 2 weeks after infection), muscle M-line assembly protein unc-89 (for 4 and 8 weeks after infection) and peroxidasin-like protein (for 2, 4, and 8 weeks after infection. The gene discussed is PXDNL; the disease is infection.