Figure 3.
Serosurveillance results for IDV in cattle among provinces of China, 2022–2023. (A) The numbers of serum samples positive for IDV antibodies from cattle in each province of China, 2022–2023. The colours indicate seropositive rates of IDV in cattle among provinces according to the legend located at the left bottom of the map. The numbers of serum samples positive for IDV antibodies are given in red colour (bold font), and the numbers of total serum samples collected in cattle in individual provinces are given in yellow colour (bold font). The overall IDV seropositive rate in cattle in China according to this study is indicated in the top of the map. (B) The HI titre of each serum sample obtained from cattle across provinces. The colours indicate different levels (less than 10, 10–20, 20–40, 40–160, and 160–1280) of HI titres. The error bar in red colour represents the geometric mean HI titre. Serum samples with HI titres equal to or higher than 10 are counted as positive. Data on the right y-axis represent the distribution of serum samples with HI titres less than 10, equal to or higher than 10 but less than 40, and equal to or higher than 40.
