Fig. 2
From: Spread of avian pathogenic Escherichia coli ST117 O78:H4 in Nordic broiler production
Maximum likelihood tree of 83 ST117 E. coli based on 2,617 purged core SNPs. The analysis includes 62 ST117 poultry isolates and 21 international strains. A distinct clade of 53 closely related APEC isolates collected from both broilers and parents (P) on Danish (DK), Finnish (FIN) and Norwegian (NO) chicken farms was identified. Fourty-seven of these isolates were of serotype O78:H4 (blue), whereas a single was O53:H4 (red). All isolates from this study were from diseased birds and the reference strain E. coli strain CFT073 is not included. The scale indicates substitutions per site