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Munich / Vienna / Claudia Füßler
18.07.2018
The danger of exfoliation "," Record year for ticks "," As many mini-vampires as ever "- there is a hint of panic in summer air if you follow the media headlines.The fault is, among others, Gerhard Dobler.The scientist of the Institute of Microbiology of the German Armed Forces, a partner institute of the German Center for infection research, and his team have published a model that predicts many ticks for this summer .443 ticks per 100 square meters.Last year, it was 180, as expected.
The accurate prediction of the tick population is made possible by a new model developed by researchers in Munich with colleagues from the University of Veterinary Medicine, Vienna, where for the last ten years Munich residents have been collecting standardized ticks every month Furthermore They are hundreds of square meters in the district of Amberg. Meanwhile, they have the world's longest collection of ticks on a site.
The climatologist and epidemiologist Franz Rubel of the University of Veterinary Medicine of Vienna managed the climatic parameters provided by the German Meteorological Service. "We took into account the beech mast in 2016," explains Rubel. "When the beeches carry many fruits, the mice multiply explosively (as host animals) and thus allow many tick larvae to survive.As a result, in 2017 we had many larvae ticks "which have become nymphs.
Because the winter of 2017/2018 was mild, many nymphs survived. In 2018, they are looking for big animals and humans to have a blood meal. Ruble: "This process is synchronized by the large-scale climate and determines the frequency of ticks throughout central Europe.Thus, in February 2018, a seasonal prognosis of ticks could be prepared, which is proved correct. "
The interest of researchers from Munich and Vienna applies to the FMSE virus, which can trigger tick-borne encephalitis. This meningitis can cause serious neurological damage in humans and end in death. Rubles: "Areas of high tick density are very well correlated with FSME distribution areas." These are Bavaria, Baden-Württemberg, South Hesse and South-East Thuringia
. TBE and Lyme borrelia are the best known. Both pathogens are transmitted by the common ibex turtle, which affects humans most frequently in our climates.
Munich DZIF researchers showed that infection with TBE virus is relatively constant, regardless of the number of ticks in one year, Every 50th to 100th tick carries the TBE virus. Things are different for Lyme disease: according to experts, all three to four ticks are infected. It is estimated that between 60,000 and 200,000 people in Germany suffer from Lyme disease each year. The numbers vary so much because the disease is not notifiable in all federal states.
There is no reason to panic despite a record summer. According to Dania Richter, a researcher at TU Braunschweig, in particular for Lyme disease, a large population of ticks brings more diseases. "There is no clear ordinary study that proves that."
It also depends on where you are. "If a tick carrying Lyme borrelia sucks a cow or deer, the pathogen is erased, very simply .This tick can no longer infect humans at the next step," says Richter. On two-hour excursions, she and her team discovered, on average, an infected tick containing pathogenic Lyme borrelias.With two-hour excursions on fallow land, there were 56. [19659012] (function (d, s, id) {
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