Global S&T Development Trend Analysis Platform of Resources and Environment
Viruses Could Be Harder to Kill After Adapting to Warm Environments | |
admin | |
2020-09-02 | |
发布年 | 2020 |
语种 | 英语 |
国家 | 美国 |
领域 | 气候变化 |
正文(英文) | Enteroviruses and other pathogenic viruses that make their way into surface waters can be inactivated by heat, sunshine and other microbes, thereby reducing their ability to spread disease. But researchers report in ACS' Environmental Science & Technology that global warming could cause viruses to evolve, rendering them less susceptible to these and other disinfectants, such as chlorine. Enteroviruses can cause infections as benign as a cold or as dangerous as polio. Found in feces, they are released into the environment from sewage and other sources. Their subsequent survival depends on their ability to withstand the environmental conditions they encounter. Because globalization and climate change are expected to alter those conditions, Anna Carratalà, Tamar Kohn and colleagues wanted to find out how viruses might adapt to such shifts and how this would affect their disinfection resistance. The team created four different populations of a human enterovirus by incubating samples in lake water in flasks at 50 F or 86 F, with or without simulated sunlight. The researchers then exposed the viruses to heat, simulated sunlight or microbial "grazing" and found that warm-water-adapted viruses were more resistant to heat inactivation than cold-water-adapted ones. Little or no difference was observed among the four strains in terms of their inactivation when exposed to either more simulated sunlight or other microbes. When transplanted to cool water, warm-water-adapted viruses also remained active longer than the cool-water strains. In addition, they withstood chlorine exposure better. In sum, adaptation to warm conditions decreased viral susceptibility to inactivation, so viruses in the tropics or in regions affected by global warming could become tougher to eliminate by chlorination or heating, the researchers say. They also say that this greater hardiness could increase the length of time heat-adapted viruses would be infectious enough to sicken someone who comes in contact with contaminated water.
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Story Source: Materials provided by American Chemical Society. Note: Content may be edited for style and length. Journal Reference:
Cite This Page: American Chemical Society. "Viruses could be harder to kill after adapting to warm environments." ScienceDaily. ScienceDaily, 2 September 2020.
American Chemical Society. (2020, September 2). Viruses could be harder to kill after adapting to warm environments. ScienceDaily. Retrieved September 2, 2020 from www.sciencedaily.com/releases/2020/09/200902082345.htm
American Chemical Society. "Viruses could be harder to kill after adapting to warm environments." ScienceDaily. www.sciencedaily.com/releases/2020/09/200902082345.htm (accessed September 2, 2020).
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URL | 查看原文 |
来源平台 | Science Daily |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/292104 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | admin. Viruses Could Be Harder to Kill After Adapting to Warm Environments. 2020. |
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