Figure 1. Evolutionary relationship among H. pylori strains isolated from The Gambia.

Evolutionary history was inferred from concatenated sequences of the seven MLST housekeeping gene fragments (3406 bp) from 46 Gambian H. pylori using the neighbor-joining method. The analyses were conducted in MEGA5. The five strains from young children are identified with green circles. There was one subject with three different MLST types shown in red squares.