Maximum-likelihood tree of all aminoglycoside resistance determinants found in Campylobacter
jejuni CC464, CC353, CC354, and CC574 isolates, Scotland. The tree was built using MEGA7 (https://www.megasoftware.net). The variants (v) listed in G1, G2, G3, G4 groups commonly occur in the 4 CCs. Scale bar indicates nucleotide substitutions per site. Aminoglycoside resistance gene variants identified in representative isolates of 4 CCs are shown by different symbols: black diamonds, aac3; black squares, aph; black triangles, ant; black circle, sat. CC, clonal complex.