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Manure and livestock waste as fertilizer pose high risks: antibiotic contamination reaches deep into the soil
Antibiotics, as veterinary drugs and feed additives, are widely used in the livestock and poultry farming industries of countries around the world. According to statistics, China's annual use of veterinary antibiotics had already exceeded 6000 tons by 2000. However, about 60% to 90% of the antibiotics administered to farmed animals are excreted in their original form