Fig 1.
Geographic distribution and host species of fish trypanosomiasis outbreaks in aquacultures in Southern China.
The left panel shows a map with outbreak locations in freshwater (blue label) and marine (orange label) aquacultures. Coastlines are shown in blue and national borders in black. An inset map in the lower right corner shows the full geographic extent of China (The base map is using data from the Aliyun Atlas platform (https://datav.aliyun.com/portal/school/atlas/area_selector). The right panel summarizes each outbreak location and the parasitized fish species.
Fig 2.
Representative clinical and pathological features of large yellow croaker (Larimichthys crocea) infected with Trypanosoma carassii.
(A) High-density cage culture at a coastal mariculture farm in Ningde, Fujian Province. (B) Diseased and moribund fish showing abnormal swimming behavior and loss of equilibrium. (C) Gross pathology of infected fish displaying pale and enlarged liver and dark, swollen spleen. Scale bar, 2 cm. (D) Giemsa-stained blood smear showing numerous trypomastigotes (approximately 1 × 10⁹ parasites/mL). Scale bar, 10 μm. Photographer: Ju-feng Wang.