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Phylogenetic tree of invasive NTHi isolates from clade V (2014–2019). Blue circles indicate the presence of a TEM-1 β-lactamase. Shadowed areas highlight the most common STs (dark grey for ≥3 isolates and light grey for two isolates included in the ST). Relative bootstrap values other than one are given at branch nodes. Relative bootstrap values below 0.75 indicate that the branches are poorly supported. Strain Hi375 was used as the reference.
