Fig. 1: Geographical distribution of 112 polymyxin-resistant CRKP strains.

a The map depicted the relative prevalence of 112 polymyxin-resistant CRKP isolates among different provinces in China. The map was created based on a map from d-maps.com (https://d-maps.com/index.php?lang=en), which was free for use. b Changes in prevalence rate of polymyxin-resistant CRKP isolates during the period 2000 to 2023. The four pie charts showed the isolation time (c), different types of carbapenemases expressed by the test strains (d), and prevalence the ST type (e) and KL type (f) of the 112 polymyxin-resistant CRKP isolates tested in this study.