Fig. 1.

(a) Maximum-likelihood phylogeny based on whole-genome sequences of 401 isolates implicated in the outbreak rooted against an unrelated isolate of S. Enteritidis isolated from Luxembourg. (b) Distribution network for the 167 cases that were both sequenced and documented on the network, with arrows representing likely contaminations. Black circles represent cases, while internal nodes (sources) are represented as coloured disks, with a size proportional to the number of subsequent infections. The five point-source outbreaks associated with three Chinese restaurants (B, C, D), a hospital (E) and kebab grill (A) are coloured on the phylogeny and labelled on the trace-back network. Company X is the blue centroid sphere.