The phylogenetic tree based on core genomes of 26 cefiderocol-resistant Escherichia coli strains and the comparison diagram of detected antimicrobial-resistant genes. The blank part represents the absence of the corresponding gene, and the colored parts represent the presence of the corresponding gene. This figure comprised 3,382/9,018 core to total genes. RTIs, respiratory tract infection; UTIs, urinary tract infection; BSIs, bloodstream infection; IAIs, intra-abdominal infection.