First record of Aedes japonicus in Liguria region, Northwest of Italy
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Aedes japonicus
Invasive mosquito species
Entomological surveillance

How to Cite

Listorti, V., Accorsi, A., Riina, M. V., Peletto, S., Acutis, P. L., Carta, V., Ferrari, A., Corona, C., Casalone, C., Ercolini, C., Guardone, L., Brunelli, F., & Razzuoli, E. (2023). First record of Aedes japonicus in Liguria region, Northwest of Italy. Veterinaria Italiana, 59(2). https://doi.org/10.12834/VetIt.3115.21678.2


Aedes japonicus is an invasive Asian mosquito species, and to date it is widespread in many European countries. In Italy, it was first recorded in 2015 at the Austrian border and it then spread throughout the Northeast of the country. In 2019, it was also identified in Piedmont region, near the Swiss border. In the framework of the Italian program for prevention, surveillance, and response to Arboviruses, from June to November 2021, biweekly entomological surveillance was performed in the Liguria region (Northwest Italy). The collected mosquitoes were morphologically and genetically identified and molecularly analysed for the detection of West Nile and Usutu viruses. Six female mosquitoes, trapped on the 6th of July 2021 using a gravid trap in Albenga (Savona province), were morphologically identified as Ae. japonicus and the identification was genetically confirmed. The pool tested was negative for the presence of West Nile and Usutu viruses. The detection of Ae. japonicus was performed in a coastal area characterized by the presence of many floriculture activities. Considering the distance from the established Ae. japonicus mosquito populations in Italy and other European countries, this could represent an independent introduction in this country.

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Tanaka K., Mizusawa K. & Saugstad E.S. 1979. A revision of the adult and larval mosquitoes of Japan (including the Ryukyu Archipelago and the Ogasawara Islands) and Korea (Diptera: Culicidae). Contrib Am Entomol Inst, 16, 1-987.

Kampen H. & Werner D. 2014. Out of the bush: the Asian bush mosquito Aedes japonicus japonicus (Theobald, 1901) (Diptera, Culicidae) becomes invasive. Parasit Vectors, 7, 59.

Laird M., Calder L., Thornton R.C., Syme R., Holder P.W. & Mogi M. 1994. Japanese Aedes albopictus among four mosquito species reaching New Zealand in used tires. J Am Mosq Control Assoc, 10, 14-23.

Peyton E.L., Campbell S.R., Candeletti T.M., Romanowski M. & Crans W.J. 1999. Aedes (Finlaya) japonicus japonicus (Theobald), a new introduction into the United States. J Am Mosq Control Assoc, 15, 238-41.

Schaffner F., Chouin S. & Guilloteau J. 2003. First record of Ochlerotatus (Finlaya) japonicus japonicus (Theobald, 1901) in metropolitan France. J Am Mosq Control Assoc, 19, 1-5.

Versteirt V., Schaffner F., Garros C., Dekoninck W., Coosemans M. & Van Bortel,W. 2009. Introduction and establishment of the exotic mosquito species Aedes japonicus japonicus (Diptera: Culicidae) in Belgium. J Med Ent, 46, 1464-7.

Schaffner F., Kaufmann C., Hegglin D. & Mathis A. 2009. The invasive mosquito Aedes japonicus in central Europe. Med Vet Ent, 23, 448-51.

Ibaňez-Justicia A., Kampen H., Braks M., Schaffner F., Steeghs M., Werner D., Zielke D., Hartog W. Den Brooks M., Dik M., van de Vossenberg B. & Scholte E.- J. 2014. First report of established population of Aedes japonicus japonicus (Theobald, 1901) (Diptera, Culicidae) in the Netherlands. J Eur Mosq Control Assoc, 32, 9-13

Seidel B., Duh D., Nowotny N. & Allerberger F. 2012. Erstnachweis der Stechmücken Aedes (Ochlerotatus) japonicus japonicus (Theobald, 1901) in Österreich und Slowenien in 2011 und für Aedes (Stegomyia) albopictus (Skuse, 1895) in Österreich 2012 (Diptera: Culicidae). Entomol Zeitschrift, 122, 223-6.

Seidel B., Nowotny N., Bakonyi T., Allerberger F. & Schafner F. 2016. Spread of Aedes japonicus japonicus (Theobald, 1901) in Austria, 2011–2015, and first records of the subspecies for Hungary, 2012, and the principality of Liechtenstein, 2015. Parasit Vectors, 9, 356.

Klobucar A., Lipovac I., Žagar N., Mitrović-Hamzić S., Tesic V., Vilibić-Čavlek T. & Merdic E. 2019. First record and spreading of the invasive mosquito Aedes japonicus japonicus (Theobald, 1901) in Croatia. Med Vet Ent, 33, 171-6.

Eritja R., Ruiz-Arrondo I., Delacour-Estrella S., Schaffner F., Álvarez-Chachero J., Bengoa M., Puig M.Á., Melero-Alcíbar R., Oltra A. & Bartumeus F. 2019. First detection of Aedes japonicus in Spain: an unexpected finding triggered by citizen science. Parasit Vectors, 12, 53.

Janssen N., Graovac N., Vignjević G., Bogojević M. S., Turić N., Klobučar A., Kavran M., Petrić D., Ćupina A. I., Fischer S., Werner D., Kampen H. & Merdić E. 2020. Rapid spread and population genetics of Aedes japonicus japonicus (Diptera: Culicidae) in southeastern Europe (Croatia, Bosnia and Herzegovina, Serbia). PloS one, 15, e0241235.

Seidel B., Montarsi F., Huemer H.P., Indra A., Capelli G., Allerberger F. & Nowotny N. 2016. First record of the Asian bush mosquito, Aedes japonicus japonicus, in Italy: invasion from an established Austrian population. Parasit Vectors, 9, 284.

Montarsi F., Martini S., Michelutti A., Da Rold G., Mazzucato M., Qualizza D., Di Gennaro D., Di Fant M., Dal Pont M., Palei M. & Capelli G. 2016. The invasive mosquito Aedes japonicus japonicus is spreading in northeastern Italy. Parasit Vectors, 12, 120.

Mosca A., Perna M.F., Giovannozzi M. & Roberto P. 2022. First report of two Asian invasive mosquito species, Aedes japonicus and Aedes koreicus, in Piedmont, northwest Italy. Ann Ist Super Sanita, 58, 162-5.

Medlock J.M., Hansford K.M., Schaffner F., Versteirt V., Hendrickx G., Zeller H. & Van Bortel W. 2012. A review of the invasive mosquitoes in Europe: ecology, public health risks, and control options. Vector Borne Zoonotic Dis, 12, 435-47.

Huber K., Jansen S., Leggewie M., Badusche M., Schmidt-Chanasit J., Becker N., Tannich E. & Becker S.C. 2014. Aedes japonicus japonicus (Diptera: Culicidae) from Germany have vector competence for Japan encephalitis virus but are refractory to infection with West Nile virus. Parasitol Res, 113, 3195-9.

Schaffner F., Vazeille M., Kaufmann C. & Failloux A.B. 2011. Mathis A. Vector competence of Aedes japonicus for chikungunya and dengue viruses. Eur Mosq Bull, 29, 141-2.

Jansen S., Heitmann A., Lühken R., Jöst H., Helms M., Vapalahti O., Schmidt-Chanasit J. & Tannich E. 2018. Experimental transmission of Zika virus by Aedes japonicus japonicus from southwestern Germany. Emerging Microbes Infect, 7, 192.

Turell M.J., O’Guinn M.L., Dohm D.J. & Jones J.W. 2001. Vector competence of North American mosquitoes (Diptera: Culicidae) for West Nile virus. J Med Entomol, 38, 130-4.

De Carlo C.H., Campbell S.R., Bigler L.L. & Mohammed H.O. 2020. Aedes japonicus and West Nile Virus in New York. J Am Mosq Control Assoc, 36, 261-3.

Italian ministry of health website. Available on line: https://www.salute.gov.it/imgs/C_17_pubblicazioni_2947_allegato.pdf (accessed on 7th February 2023).

Becker N., Petric D., Zgomba M., Boase C., Madon M. & Dahl C. 2010. Kaiser A. Mosquitoes and Their Control, 2nd Ed., Heidelberg etc., Springer.

Tsai-Yu H. & Bohart R.M. 1946. The mosquitoes of Japan and their medical importance. Navy Department, Bureau of Medicine and Surgery, Washington, D.C.

ECDC website. Available on line: https://www.ecdc.europa.eu/sites/default/files/media/en/publications/Publications/TER-Mosquito-surveillance-guidelines.pdf (accessed on 7th February 2023).

Dawnay N., Ogden R., McEwing R., Carvalho G.R. & Thorpe R.S. 2007. Validation of the barcoding gene COI for use in forensic genetic species identification. Forensic Sci Int, 173, 1-6.

Cameron E.C., Wilkerson R.C., Mogi M., Miyagi I., Toma T., Kim H.C. & Fonseca D.M. 2010. Molecular phylogenetics of Aedes japonicus, a disease vector that recently invaded Western Europe, North America, and the Hawaiian islands. J Med Entomol, 47, 527-35.

Del Amo J., Sotelo E., Fernández-Pinero J., Gallardo C., Llorente F., Agüero M., Jiménez-Clavero M.A. 2013. A novel quantitative multiplex real-time RT-PCR for the simultaneous detection and differentiation of West Nile virus lineages 1 and 2, and of Usutu virus. J Virol Methods, 189, 321-7.

Cavrini F., Della Pepa M.E., Gaibani P., Pierro A.M., Rossini G., Landini M.P. & Sambri V. 2011. A rapid and specific real-time RT-PCR assay to identify Usutu virus in human plasma, serum, and cerebrospinal fluid. J Clin Virol, 50, 221-3.

Schneider K. 2011 Breeding of Ochlerotatus japonicus japonicus (Diptera: Culicidae) 80 km north of its known range in southern Germany. Eur Mosq Bull, 29, 129-32.

Zielke D.E., Ibáñez-Justicia A., Kalan K., Merdić E., Kampen H. & Werner D. 2015. Recently discovered Aedes japonicus japonicus (Diptera: Culicidae) populations in The Netherlands and northern Germany resulted from a new introduction event and from a split from an existing population. Parasit Vectors, 8, 40.

Reuss F., Wieser A., Niamir A., Bálint M., Kuch U., Pfenninger M. & Müller R. 2018. Thermal experiments with the Asian bush mosquito (Aedes japonicus japonicus) (Diptera: Culicidae) and implications for its distribution in Germany. Parasit Vectors, 11, 81.

Krupa E., Henon N. & Mathieu B. 2021. Diapause characterisation and seasonality of Aedes japonicus japonicus (Diptera, Culicidae) in the northeast of France. Parasite, 28, 45.

Kaufman M.G. & Fonseca D.M. 2014. Invasion biology of Aedes japonicus japonicus (Diptera: Culicidae). Annu Rev Entomol, 59, 31-49.

Cunze S., Koch L.K., Kochmann J. & Klimpel S. 2016. Aedes albopictus and Aedes japonicus - two invasive mosquito species with different temperature niches in Europe. Parasit Vectors, 9, 573.

Ballardini M., Ferretti S., Chiaranz G., Pautasso A., Riina M.V., Triglia G., Verna F., Bellavia V., Radaelli M.C., Berio E., Accorsi A., De Camilli M., Cardellino U., Fiorino N., Acutis P. L., Casalone C. & Mignone W. 2019. First report of the invasive mosquito Aedes koreicus (Diptera: Culicidae) and of its establishment in Liguria, northwest Italy. Parasit Vectors, 12, 334.

Copyright (c) 2024 Valeria Listorti, Annalisa Accorsi, Maria Vittoria Riina, Simone Peletto, Pier Luigi Acutis, Valerio Carta, Alessio Ferrari, Cristiano Corona, Cristina Casalone, Carlo Ercolini, Lisa Guardone, Francesco Brunelli, Elisabetta Razzuoli