Fig. 3From: Antibiotic resistance pattern, capsular types, and molecular characterization of invasive isolates of Streptococcus pneumoniae in the south of Tunisia from 2012 to 2018Minimal spanning4 tree of MLST for invasive S. pneumoniae iso lates over the 7 –year period. Each circle represents an ST. The area of each circle corresponds to the number of isolates. The numbering shown between the connected nodes indicates the number of loci between the MLST profilesBack to article page