Fig. 2

Cluster analysis of 53 Citrobacter freundii isolates

Cladogram visualising cgMLST hierarchical clustering results, sampling dates and sequence types (ST) from 53 selected Citrobacter freundii isolates and NCBI assembly ASM381234v1 (root). Isolates that have been assigned to a cluster have < = 20 allele differences and isolates in an associated cluster have < = 40 allele differences based on minimum spanning tree analysis. All others (> 40 allele differences) are categorised as ‘sporadic’. Hierarchical clustering analysis fails to confirm cluster assignment by minimum spanning tree analysis of isolates ‘Patient16’, ‘Patient24’ and ‘Environment08’.