Add to ORKGNative parasite acquisition provides introduced species with the potential to modify native host-parasite dynamics by acting as parasite reservoirs (with the ‘spillback’ of infection increasing the parasite burdens of native hosts) or sinks (with the ‘dilution’ of infection decreasing the parasite burdens of native hosts) of infection. Exotic salmonids are frequently shown to acquire native parasites; however, as research into the threats posed by exotic salmonids has largely focused on predation and competition, threats posed by shared native parasites are poorly understood. I used a multiple-pronged approach combining field observations, experimental infections and dynamic population modelling to investigate whether native parasite acqu...