Coming from East Asia, this insect also adapts to autumn temperatures. Observed for the first time in 2011, it is now the subject of a study by the State of Milan
It is practically on all warheads: Aedes koreicus, the “korean mosquito”, Was also found in Lombardy. The reason why it is making so much talk about itself is that, compared to other insects of the genus Aedes, it adapts easily to lower temperatures typical of‘Autumn of our parts and could exploit this ability for expand rapidly in other parts of Italy, even in areas that usually remain quite free from the plague of mosquitoes, as has already happened in Veneto.
To give news of the presence in Lombardy of this mosquito originating fromfar East (Korean peninsula, Japan, some areas of China and Russia) is a team of researchers from the University of Milan who has just published in the journal Parasites & Vectors one studio conducted as part of a surveillance plan for invasive insects. On 6 thousand larvae taken at various sites in the pre-Alpine belt of from Bergamo in the period of late summer-autumn of the 2020, circa 50 were found to be of the kind NS. koreicus (4800 have been identified as Culex and the rest as genre Backstage).
However, it is not the first time that this “alien” mosquito has been found in Italy, probably arriving through trade and international flights. As reported by the Experimental Zooprophylactic Institute of the Venezie, his first reporting was made in 2011 by the entomologist Simone Martini during the surveillance activities for the tiger mosquito commissioned on the territory by the Ulss 2 company of Feltre. The affected area was one mountainous area of the province of Belluno, in which the presence of mosquitoes was generally classified as scarce. Afterwards NS. koreicus has also been reported in other Italian regions and, according to the authors of the research, has now colonized an area of over 3 thousand square kilometers, from Liguria al Trentino and al Veneto. The infesting insect is now permanently present in several European countries, first of all Belgium which reported it as early as 2008.
NS. koreicus, in short, it seems to adapt very well to lower temperatures (23-28°C) compared to other species of Aedes and feel good in too mountainous regions, a feature that could allow it to expand rapidly in the rest of Italy.
The situation, say the experts, is from to monitor carefully, as is the case for all species of pests that have the potential to be disease vectors for animals and humans. Some laboratory experiments have suggested that NS. koreicus can convey parasites humans like nematodes (Dirofilaria immitis e Brugia Malayi) e virus which are the cause of chikungunya and Japanese encephalitis, although no cases have yet been found in Italy.