Fig. 9

Scatter plots with regression lines representing the association between the number of cattle, the number of sheep, GDP, population density, precipitation, and climate with brucellosis incidence. The blue dots represent those from warm-temperate areas, the yellow squares represent those from mid-temperate areas, the green diamonds represent those from subtropical areas, the red multiplication signs represent those from tropical areas, and the purple upside-down triangles represent those from cold areas. The incidence was higher in the mid-temperate areas than in the other climate areas. In the subtropical areas, the incidence remained at a low level compared with the other climate areas