50 years ago, scientists first investigated antibiotic resistance in livestock

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.
ARTEM ZAKHAROV/ISTOCK/GETTY IMAGES PLUS
By Jonathan Lambert
JUNE 26, 2020 AT 6:00 AM
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. However, these animals may harbor microorganisms that have developed a resistance to antibiotics, and some scientists fear that these resistant organisms may be passed on to human beings…. [The U.S. Food and Drug Administration has appointed a panel to review whether] antibiotic resistance in man is enhanced by long-term, low-level exposure from foods.
Update
The first hint that antibiotic-resistant bacteria in livestock can jump to humans came in 1976, when scientists found
higher levels of such bacteria in the guts of farmers who fed antibiotics to chickens than in those farmers’ neighbors. In terms of the food supply, the FDA has detected varying levels of antibiotic-resistant bacteria in meat since monitoring began in 1996. Cooking should kill these bacteria, though some have been linked to illness in humans. Since 2013, the FDA has phased out the use of antibiotics for promoting growth in livestock.
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CITATIONS
S.B. Levy et al. Changes in intestinal flora of farm personnel after introduction of a tetracycline-supplemented feed on a farm. New England Journal of Medicine . Vol. 295, September 9, 1976, p. 583. doi: 10.1056/NEJM197609092951103
Food and Drug Administration. NARMS Now. Accessed 4/29/20.
C.M. Liu et al. Escherichia coli ST131-H22 as a Foodborne Uropathogen . mBio . Vol. 9. July/August 2018, p. e00470-18. doi: 10.1128/mBio.00470-18
About
Jonathan Lambert
Jonathan Lambert is the staff writer for biological sciences, covering everything from the origin of species to microbial ecology. He has a master’s degree in evolutionary biology from Cornell University.