, Anna Maria Dionisi, Patrizio Pezzotti, Claudia Lucarelli, Lisa Barco, Marzia Mancin, and Ida Luzzi
Figure. Dendrogram of 182 pulsed-field gel electrophoresis–based profiles of Salmonella enterica serovar Napoli strains isolated from human, environmental, animal, and food samples in Italy, 2011–2015. Four main clusters matched with the 3 main geographic areas in Italy (cluster A in northern Italy, cluster B in central Italy, and clusters C and D in southern Italy). Genetic analysis was based on 80% homology. Human strains (n = 124) are indicated by a solid vertical line. e indicates environmental strains (n = 46), a indicates animal strains (n = 8), and v indicates food (vegetable) strains (n = 4).