For example, Park and Choi (2012) showed that Nile tilapia
(O. niloticus) fed with diets containing different doses of mistletoe
(Viscum album coloratum) for a period of 80 days in which immunological
parameters were monitored (lysozyme activity, respiratory burst
activity, alternative complement activity and phagocytic activity),
displayed an increase in activity. After that period, fish were challenged
against Aeromonas hydrophila and treated fish had 42% more survivability
than the control group.