Antibiotic regulations are double-edge sword in swine production

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Use of antibiotics at sub-therapeutic levels revolutionised agriculture for the last 65 years.

Though originally introduced to treat disease, the beneficial effects of antibiotics delivered in-feed (or water) on performance, including rate of gain and feed efficiency, became important drivers for their expanded use in livestock, including pigs (Dibner and Richards, 2005).

Additional value was attached to these performance benefits later when use of feed-grade antibiotics was also shown to reduce wasted nutrients, overall farm waste, and farm labour requirements.
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