Antibiotic resistance
Antibiotic resistance is a growing problem. Some of this is due to overuse of antibiotics in humans, but some of it is probably due to the use of antibiotics as growth promoters in animal feeds. A study published in the journal "Science" in August 2007 found the rate of adaptative mutations in "E. coli" is "on the order of 10−5 per genome per generation, which is 1,000 times as high as previous estimates," a finding which may have significance for the study and management of bacterial antibiotic resistance.