Fig. 2: Hierarchical clustering dendrogram of S. pneumoniae metabolic types amongst carriage isolates (June 2015–June 2019).

The dendrogram is based on of the hamming distance between the different allelic profiles of the metabolic genes. Coloured strips represent the Metabolic type, the serotype, and the carriage survey group (early = survey 1 to 4, late = survey 5 to 8). MTs are defined by curtailing the dendrogram at half the maximum distance, indicated by the red line (n = 148 discrete MTs, containing only MTs with more than 15 observations). The inset show a magnification of the dendrogram around serotype 17F/MT109.