Fig. 3

Detection levels of the control genes 16S rRNA and ITS of S. parasitica from biofilter room and local degasser aerosol samples. The y-axis displays the inverted mean cycle quantification (Cq) values, while the x-axis represents the study period, with day 0 marking the day when the last fish was introduced to the tanks, i.e. days post-introduction (dpi). Cq values of 40 indicate negative results. ns: P > 0.05, *: P ≤ 0.05, **: P ≤ 0.01, ***: P ≤ 0.001, ****: P ≤ 0.0001.