Published in Medical Letter on the CDC and FDA, July 26th, 1999
For more than 30 years, antibiotics have been added to animal feed to increase animal growth. The use of antibiotics in animals is estimated to account for more than half the total antibiotic use worldwide. One growth-promoting antibiotic, avoparcin, causes growth of a bacterium (Enterococcus faecium) resistant to the antibiotic vancomycin.
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