Tigermucke becomes the imported dangerous mosquito
In Freiburg the authorities are currently fighting against the Asian Tigermucke – but how dangerous mosquito is the immigrant from Asia really?
Hanover: Freiburg is alarmed. And so much so, that everything is now turned around and dry. Flower pots, rain pans and balcony boxes. After the authorities discovered the Asian Tigermücke in a Kleingartenkolonie, the city called on the citizens to assist in combating the intruder and to eliminate possible breeding grounds.
Experts welcome the actionism of the Freiburgers in the fight against the insect. As soon as a small mosquito can become a big problem, one experienced in 2007 in Italy, where suddenly the fatal Chikungunya virus, which was otherwise known only in the Asian region, ran rampant. At that time an infected Indian had traveled to Northern Italy and had been stabbed by a tiger. The animal carried the virus further – and quite successfully. 200 cases of illness and one dead were registered.
The car tire trade brought the Tigermucke to Europe
In 1990 the Tigermucke, which also transmits dengue fever as well as yellow fever, first appeared on the European continent in Genoa. It was due to global trade in used tires – and Asia is one of the largest tire exporters in the world. The rubber provides the females ideal conditions to lay their eggs: a humid and warm climate. If the tires run full of rain water, the animals hatch. Once in Italy, the Tigermucke spread northwards. The aggressive animals followed drivers into their cars and traveled as secret riders to Baden-Württemberg.
Meanwhile the Asian Tigermücke wintered the third year in Germany. Helge Kampen, mosquito researcher and virologe at the Friedrich-Loeffler-Institut on the island of Riems in Mecklenburg-Vorpommern, explains that the Tigermücke has become almost as good as domestic. “We must be aware that we can not get rid of them. So we have to try to keep the population as small as possible. “Because in the transmission of viruses the day-active and aggressive insect is” extremely efficient “.
The real danger comes from the travelers
As long as it does not affect any infected person, there is no greater danger from the Tigermucke. But this can change at any time. “The higher the population density, the greater the probability that the Tigermücke meets a diseased traveler,” warns Kampen. Doreen Walther, Germany’s best-known Muckenexpertin from the Leibniz Center for Agricultural Landscape Research (ZALF), sees the appearance of the Tigermücke with the serenity of a scientist. After all, mosquito species such as tiger or yellow fever mosquitoes are well researched. Contrary to the conventional mosquito, which is still comparatively little known.
Together with her colleague Helge Kampen, Walther created the German mosquito leaflet – a database with so-called mosquito-relevant data for Germany. To this end, the researchers are using a very simple method: they evaluate applications from all over the Federal Republic. Walthers first Asian bush mosquito, also known as Japanese bush mosquito and transporter of pathogens such as the West Nile virus, arrived in an envelopes from Barsinghausen near Hanover in the ZALF.
With bacteria against the plague glands
When the occurrence of the plague ghosts takes over, Norbert Becker comes into play. Becker is chairman of the KABS, the municipal community of action to fight the Schnakenplage, and thus something like Germany Mückenjager number one. Becker wants to get the leak-tested municipalities on the Rhine without gnats. At the moment he is in his main season, even if the mosquito year 2017 so far was still moderate. So far, because this can change – as the weather report – at any time. Two assignments have already been flown by Becker and his team. From helicopters, they spread the bacterium Bacillus thuringiensis israelensis along the banks of the Rhine, in short Bti. The bacterium causes a slow death of insects by destroying the intestinal wall of the larvae. This sounds brutal, but it is environmentally friendly,