Sea lice are the most problematic marine pathogens the salmon industry has to deal with, significantly affecting Europe and America. The worst offenders are genera: Pseudocaligus, Caligus, and Lepeophtheirus. Over €305 million in losses are estimated. Recent results have suggested that subolesin/akirin/myosin32 are good candidate antigens for the control of arthropod infestations such as sea lice. The aim of this study was to design and optimize the purification step of MY32/Ls protein to obtain the active pharmaceutical ingredient against sea lice. Non-chromatographic purification strategies were employed, based on published works, to establish rupture, washing, solubilization, and refolding conditions…