Preliminary results on an autochthonous dengue outbreak in Lombardy Region, Italy, August 2023

Author:

Cassaniti Irene123,Ferrari Guglielmo12,Senatore Sabrina4,Rossetti Eva4,Defilippo Francesco5,Maffeo Manuel67,Vezzosi Luigi86,Campanini Giulia2,Sarasini Antonella2,Paolucci Stefania2,Piralla Antonio2,Lelli Davide5,Moreno Ana5,Bonini Maira4,Tirani Marcello98,Cerutti Lorenzo10,Paglia Stefano11,Regazzetti Angelo12,Farioli Marco8,Lavazza Antonio5,Faccini Marino4,Rovida Francesca23ORCID,Cereda Danilo138,Baldanti Fausto1323,

Affiliation:

1. These authors contributed equally to this work and share first authorship.

2. SC Microbiology and Virology, IRCCS Policlinico San Matteo, Pavia, Italy

3. Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy

4. Department of Hygiene and Health Prevention, Health Protection Agency, Metropolitan Area of Milan, Milan, Italy

5. Virology Department, Istituto Zooprofilattico Sperimentale della Lombardia ed Emilia Romagna, Brescia, Italy

6. Department of Hygiene and Health Prevention, Health Protection Agency Val Padana, Mantova, Italy

7. Postgraduate School in Public Health, Department Biomedical Sciences for Health, University of Milan, Milan, Italy

8. General Directorate of Welfare, Regione Lombardia, Milan, Italy

9. Health Director Staff, Health Protection Agency, Metropolitan Area of Milan, Milan, Italy

10. SC Chemical-Clinical Analysis and Microbiology Laboratory, ASST Lodi, Lodi, Italy

11. Department of Emergency and Urgency, ASST Lodi, Lodi, Italy

12. SC Infectious and Tropical Diseases, ASST Lodi, Lodi, Italy

13. These authors contributed equally to this work and share last authorship.

Abstract

In August 2023, six locally acquired dengue virus 1 infections were detected in Lodi province, Lombardy Region, in northern Italy, where the vector Aedes albopictus is present. Four cases were hospitalised, none died. The viruses clustered with Peruvian and Brazilian strains collected between 2021 and 2023. This preliminary report highlights the importance of continued integrated surveillance of imported vector-borne virus infections and the potential for tropical disease outbreaks in highly populated regions of northern Italy where competent vectors are present.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Subject

Virology,Public Health, Environmental and Occupational Health,Epidemiology

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