This notion, however, is mistaken. Bacterial resistance to antibiotics has nothing to do with evolution. Evolution, in the Darwinian sense of undirected (unintelligent) process of random heritable variation and natural selection, is the process by which populations of living things change over time without intelligent agency causing or guiding the process. When the process of change in populations is guided by intelligence, it is called artificial selection -- breeding.Shhhh. Don't tell Michael Behe who wrote a whole book based on resistance to antimalarial drugs.
Of course I'm not the first to point this out. Charles Darwin, in the Origin of Species, made exactly the same argument. In his first chapter, he discussed artificial selection -- animal husbandry and breeding of plants. In subsequent chapters he developed an argument that in nature, changes in population are accomplished by natural selection, without intelligent agency. Darwin distinguished artificial selection from natural selection -- he distinguished breeding from evolution, and of course his theory of evolution is a theory of natural selection, not a theory of animal husbandry or plant breeding, which had been practiced for thousands of years and to which Darwin contributed nothing.
Bacterial resistance to antibiotics is artificial selection. Antibiotics are intelligently designed by medical researchers, deliberately administered to patients by doctors, who understand that there are some bacteria that are not sensitive to the antibiotic and that have the potential to proliferate. Actually, the administration of antibiotics that kill some but not all of the bacteria in the patient is quite deliberate, because there are huge populations of beneficial bacteria (e.g. in the gut) that should not be killed since they are necessary for health.
Thursday, February 26, 2015
Bacterial resistance to antibiotics has nothing to do with evolution according to Michael Egnor MD
No, Despite Often-Heard Claims, Antibiotic Resistance in Bacteria Is Not Evolution.