Fig. 2

Prevalence and genotypic associations of autotransporter genes in C. jejuni. A total of 5829 genomes were phylogenetically clustered using Feature Frequency Profiling with a word length of 18. This clustering was depicted in a phylogenetic tree using Figtree. The first row beneath the resulting tree labelled isolation source indicates the source of isolation for each genome within the collection via colour coding with labels directly beneath this row. Rows labelled “capC1”, “capC2”, “capC3”, “capC4”, “capD1”, “capD2” and “capD4” indicate whether the corresponding genomes possesses either intact (dark blue colouring) or inactive (red colouring) formats of each of these genes. No colouring in these rows indicates the absence of a particular autotransporter gene. The box in the middle of the figure labelled “capC G-tract” indicates the length of the homopolymeric tract in the putative promoter region of the capC gene detected within a particular genome. Dark blue colouring indicates the capC or capD gene is intact whereas red colouring indicates whether the capC or capD gene is inactive. G-tract length ranges from 4 to ≥10. The final row shows the associated MLST clonal complex of the corresponding C. jejuni genomes