(118) examined the cellular and humoral immune response of S. molnari-infected carp over a 63-day period and observed a mild systemic response in the head kidney during the initial stages of the infection, with increased expression of pro-inflammatory cytokines, including ifnγ. A peak in parasite numbers at 28 days post-infection was followed by a massive increase in the number of lymphocytes detected in the blood and a spike in il10 expression (up to 1456-fold) at 56 days post-infection. This evidence concerns the gene IL10 and infection.