Are mice mammals?

Mouse is a mammal, and its reproduction mode is viviparous, which is the fastest reproduction and the strongest vitality among mammals. There are about 480 kinds of mice in the world. In theory, the growth rate of mice should be a geometric multiple, but in fact, due to various factors, the growth rate of mice is relatively limited. Rats are widely distributed in waterways, toilets, kitchens, fields and so on. The common colors of mice are black, white and gray, and the natural enemies are cats, snakes and eagles.

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Rats often haunt sewers, toilets, kitchens, sundries and garbage dumps. They have a keen sense of smell, and when they smell human beings, they will hide far away. The nest will be set in an unknown place and will never be disturbed. Rats eat all kinds of food, sour, sweet, bitter and spicy, and they like cereals, melon seeds, peanuts and fried foods best.

Rats move in different places every day. They carry many kinds of bacteria. Unconsciously, we ate the food that the mouse had eaten. At this time, the virus transmitted by mice in food will enter our bodies, and we may suffer from epidemic hemorrhagic fever. If treatment is not timely, it is likely to be life-threatening. Moreover, in order to grind their teeth, mice often gnaw at doors, wardrobes and so on. In the wild, rats often steal food, dig fields and destroy trees, which is harmful to the development of forestry and agriculture. In addition, rats digging holes everywhere also endanger the quality of buildings and bring hidden dangers to people's lives.

The harm of rats to human beings: The World Health Organization pointed out that infectious diseases are still the main killers threatening human life and health in the 2 1 century, and the possibility of public health emergencies caused by infectious diseases still exists in the future. The threat of these infectious diseases will be aggravated with the change of human behavior, ecology and climate, land use mode and the development of economy, tourism and immigration. Many human infectious diseases are natural focus diseases. The source of infection is the storage host of wild animals. Some rodents are not only vectors of infectious diseases, but also sources of infection or storage hosts of pathogens. The diseases they transmit are diseases transmitted by rodents. This disease is like a sleeping beast, which may endanger human health at any time. China has identified nearly 80 species of mice that can transmit diseases. 90% rodents in the world can carry more than 200 pathogens, 57 of which can cause diseases. Among them, plague and epidemic hemorrhagic fever have a more serious impact on human health. According to relevant records, since 1990, the epidemic situation of plague in China has obviously increased. For example, in Yunnan, Guizhou, Guangxi, Qinghai, Tibet, Xinjiang, Gansu, Sichuan and Inner Mongolia, there were 860 cases of human plague between198/kloc-0 and 2002. In recent years, with the increase of labor export year by year, a large number of people have entered the epidemic areas to engage in activities such as gold panning, mining, water conservancy construction, herb gathering and tourism. The possibility of contact with infected animals is greatly increased. Besides, the transportation is convenient. Population mobility is high, and the scope of cities is shrinking. Once inadvertently infected with the epidemic, it may cause the occurrence and epidemic of human plague at any time.