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. 2018 Mar;24(3):562-565.
doi: 10.3201/eid2403.171178.

Molecular and Epidemiologic Analysis of Reemergent Salmonella enterica Serovar Napoli, Italy, 2011-2015

Michela Sabbatucci, Anna Maria Dionisi, Patrizio Pezzotti, Claudia Lucarelli, Lisa Barco, Marzia Mancin, Ida Luzzi

Molecular and Epidemiologic Analysis of Reemergent Salmonella enterica Serovar Napoli, Italy, 2011-2015

Michela Sabbatucci et al. Emerg Infect Dis. 2018 Mar.

Abstract

Human infections with Salmonella enterica serovar Napoli are uncommon in Europe. However, these infections represented 5.9% of salmonellosis cases in Italy during 2014-2015. The source of infection is unknown. We analyzed surveillance data and compared strain genetic similarities and found that contaminated vegetables and surface water are probable sources of human infection.

Keywords: Italy; Salmonella enterica serovar Napoli; bacteria; environment; epidemiology; food contamination; food safety; human infections; infections; molecular analysis; reemergence; salmonellosis; surface water; vegetables; waterborne disease; zoonoses.

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Figures

Figure
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).
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