In recent years, one of the problems that has seriously worried the population of many cities around the world is the sharp increase in the number of rats. In the cities of the USA, the United Kingdom, Canada, the Netherlands, and other developed countries, this situation is being observed more and more often, according to local and international publications.
Specialists explain this dangerous trend in different ways. Among the reasons are problems with the timely collection of urban waste, worn-out sewer systems, the growth of fast food culture, as well as global climate change and mild winter seasons.
According to information provided by the British Pest Control Association (BPCA), over the past five years, requests for rat extermination from member companies have increased significantly. For example, the Cleankill company, operating in the south of England, noted that over the past two years such requests have grown by 20 percent.
The situation has also sharply worsened in the USA and Canada. A scientific study published in the journal Science Advances recorded an increase in rat activity in a number of cities over the past 20 years. In particular, in Washington — by 400 percent, in San Francisco — by 300 percent, in New York — by 160 percent, and in Toronto — by 180 percent.
Scientists emphasize that rats are by nature very fertile animals. One female can produce six litters a year, each with up to twelve pups. If left uncontrolled, just two rats can produce more than a thousand offspring in a single year.
At the same time, the “neophobia” of rats — that is, their cautious fear of new things — makes the process of extermination even more difficult. By testing poison in small amounts and then consuming it carefully, they reduce the possibility of being eliminated by ordinary methods. In addition, some rats have been found to develop genetic mutations that create immunity to certain chemicals.
For this reason, pest control services are switching to the use of modern long-acting preparations and are developing new strategies. However, experts emphasize that the effectiveness of such measures is also limited.
Specialists warn that rats not only damage urban infrastructure but also pose a serious threat to human health. They can spread dangerous diseases such as leptospirosis, hantavirus, and be a source of various infections.
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