Fig. 4

Genetic relatedness of the characterized L. pneumophila isolates and associated mortality. Legend to Fig. 4: Minimum spanning tree showing the sequence types (ST) of L. pneumophila strains isolated from 30 patients with Legionnaires' disease. Blue circles represent serogroup 1 strains and purple circles represent the non-1 serogroups. ST number is shown inside the circle, and circle size is proportional to the number of strains assigned to each ST. Lighter shades of blue and purple denote fatal cases (all-cause 30-day in-hospital mortality). Line length connecting circles is proportional to the number of allele difference (in parentheses) between the defined STs. NT denotes nontypeable