Proteomic Analysis of Excretory and Secretory Products Co-Immunoprecipitated Using Time Course Infection Sera.

is a widespread pathogen that is known for its harmful effects on the health and productivity of ruminant animals. To identify the proteins present in all periods of infection with but not in those with by shotgun liquid chromatography-tandem mass spectrometry (LC-MS/MS), we collected the ESPs and sera of and . In this study, the sheep were artificially infected with and the sera were collected at five different periods: 3 days post-infection (dpi), 7 dpi, 21 dpi, 63 dpi, and 112 dpi. The interacting proteins were pulled down from the sheep sera of all five periods and the sera with by co-immunoprecipitation (Co-IP) assay, before being identified by LC-MS/MS analysis. Thirty, twenty-two, twenty-three, twenty-seven, and twenty-two proteins were pulled down by the infected sera at 3 dpi, 7 dpi, 21 dpi, 63 dpi, and 112 dpi, respectively. Among them, 12 proteins existed in all periods, while six proteins could be detected in all periods in but not in . Protein relative pathway analysis revealed that these proteins mainly refer to the metabolism, regulation of genetic activity, and signal transduction of . In conclusion, this study provides meaningful data for the diagnosis of fasciolosis and to understand the interactions between and the host.