Only ESBL-E were subjected to whole-genome sequencing (WGS) as described recently (21 (link)). Subsequently, we performed multilocus sequence typing (MLST) and core genome MLST (cgMLST) if a species-specific scheme was available at https://www.cgmlst.org (22 (link)). Based on the allelic profiles of the cgMLST scheme, we constructed a neighbor-joining tree to display the clonal relationship among the ESBL-E and, if applicable, additional reference strains using Ridom SeqSphere+ software version 7 (Ridom GmbH, Münster, Germany) (23 (link)). For extraction of genomic determinants related to the ESBL phenotype, we used the AMRFinder (24 (link)) that is implemented in SeqSphere+. The genome sequences determined here were available at https://www.cgmlst.org.
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