Antibiotics have been available as medicines for less than 100 years, and now the drug-resistant "superbugs" have caused headaches in the medical community. How do bacterial resistance develop? Canadian researchers recently reported that they have isolated drug resistance genes from bacterial DNA more than 30,000 years ago. For the first time, rigorous experiments have shown that drug resistance genes are rooted in bacteria, even earlier than Humans have discovered antibiotics. Researchers at McMaster University in Canada drilled sediments from the Yukon region in the northwest of the country and obtained samples of soil that had been frozen for more than 30,000 years to extract bacterial DNA. They used strict methods to ensure that the samples were not contaminated by modern microorganisms and confirmed that the DNA belonged to ancient bacteria. Analysis shows that there are multiple fragments of drug resistance genes in these DNAs, such as genes for penicillin, tetracycline and vancomycin. Based on these ancient DNA fragments, the researchers recovered a vancomycin-resistant gene and the protein it encodes, and found that its function is the same as that of modern vancomycin-resistant substances, and the structure is also very similar. This discovery is not surprising, because most antibiotics are originally natural substances, fungi or bacteria to kill other bacteria "chemical weapons", but today in mass production using artificial synthesis. Some scientists speculate that in the "civil war" of microbes, the co-evolution of drug resistance and natural antibacterial substances "one-foot high, one-foot high" has been a long time. Related papers were published in the new issue of the "Nature" magazine online version on August 31. The new discovery means that there are many existing bacterial resistance genes in nature. Under the evolutionary pressure brought by antibiotics, drug-resistant strains will stand out at any time, and no antibiotic is always effective. The first antibiotic, penicillin, was discovered in the early 20th century and was widely used in the 1940s. Soon people discovered the problem of drug resistance. After each new antibiotic comes out, drug-resistant strains against it will soon appear, preventing abuse and misuse of antibiotics to curb the resistance of bacteria has become an important issue in public health management. There are Other Stainless Steel Kitchenware, such as stainless steel pots, stainless steel pans and more. Retaining the taste of food is the great advantages of Stainless Steel KitchenWare.The stainless steel keeps the taste and flavor unchanged. Moreover, it does not add any metallic taste to the food. Even the Stainless Steel Kitchenware does not react with the alkaline and acidic food and ensures the food safety. If the food safety is maintained properly, then the food value and nutrition of the food will remain unchanged. Other Stainless Steel Kitchenware Kitchen Utensils,Kitchen Skimmer,Onion Chopper,Vegetable Chopper Yangjiang Superwins Trade Co., Ltd. , https://www.superwins-kitchenware.com