Bacteria are becoming increasingly resistant to common antibiotics. Often, resistance is mediated by resistance genes, which can simply jump from one bacterial population to the next. It’s a common assumption that the resistance genes spread primarily when antibiotics are used, a rationale backed up by Darwin’s theory: only in cases where antibiotics are actually being used does a resistant bacterium have an advantage over other bacteria. In an antibiotic-free environment, resistant bacteria have no advantage. This explains why health experts are concerned about the excessive use of antibiotics and call for more restrictions on their use.
Source:
EurekAlert by Eth Zurich/Stefan Fattinger
EurekAlert by Eth Zurich/Stefan Fattinger
