50 years ago, scientists first investigated antibiotic resistance in livestock
Excerpt from the June 27, 1970 issue of Science News
Decades of research into the effects of feeding antibiotics to cows and other livestock to boost their growth has revealed that the practice can be problematic for humans.
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Panel to study animal feeds, Science News, June 27, 1970
Most animal feeds contain antibiotics … to promote fast weight-gain in species raised for human food.