- The arrival was confirmed by a team of scientists following receipt of a citizen notification in August 2015 via the Mosquito Alert app.
- With this finding, Huesca is added to the list of Spanish provinces affected by the tiger mosquito and Aragon is the latest Spanish autonomous community to host this invasive species.
The tiger mosquito can now be found in the interior of Spain. The news was related in the Bulletin of the Aragonese Entomological Society vol. 58, published in June 2016 after a control and monitoring team for the invasive species created by the Ministry of Health and based at the University of Zaragoza confirmed the sighting in the city of Huesca.
In August 2015 the Mosquito Alert platform received a photo of a mosquito sent from the city of Huesca, more specifically near Miguel Servet Park. After the persons validating information sent via the platform confirmed that the mosquito met the typical characteristics of a tiger mosquito, a team of entomologists went to carry out an inspection of the area. “There were many places which were likely centers of mosquito breeding, and in some of them which had water we were able to identify tiger mosquito larvae,” explains Sarah Delacour, researcher at the Faculty of Veterinary Science at the University of Zaragoza. The entomologists also set up traps in order to collect eggs and take them to the laboratory, and, in fact, “a proportion of the larvae which hatched were tiger mosquitos,” says Sarah Delacour. The team also captured two tiger mosquito females in the immediate surroundings of the inspected area.
The mosquitos may have been introduced from other countries
Following genetic analysis it was found that the DNA of the tiger mosquitos found in the city of Huesca was a bit different from those found in the rest of the Iberian Peninsula. “Considering that this mosquito moves around the country by means of human transportation, it is possible to imagine that they came from anothercountry,” says Frederic Bartumeus, director of Mosquito Alert, though he also insists on the necessity of additional analyses to confirm this possibility.
The fact of having found the mosquito in an interior, pre-Pyrenean province could indicate that the species is developing an increased tolerance to the continental Mediterranean climate which has colder winters and very dry and mild summers. “Over the past few years, it is not only spreading along the coast, but it is also appearing at different points in the interior,” says Frederic Bartumeus, adding, “in the near future we will know if it is capable of adapting quickly to the continental climate or if these processes of colonization towards the interior of the Peninsula turn out to be unsuccessful”.
Public health agencies have started working on the issue
The detection of the tiger mosquito in Aragon has initiated the dispatching of city-level inspections in order to continue with monitoring and control of the species. Also, in terms of sanitary protocols, the Directorate for Public Health of the Spanish Ministry of Health, Social Services and Equality is adapting the nationally-adopted protocol for the province of Aragon.