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Despite recent efforts by health experts, doctors, and the Food and Drug Administration to pull the meat industry away from its heavy use of antimicrobials, livestock producers seem to have dug in their heels.

From 2009 to 2014, the amount of antimicrobials sold and distributed for use in livestock increased by 22 percent, according to an FDA report released Thursday. Of the antimicrobials sold in 2014, 62 percent were related to drugs used in human health, also called medically important. From 2009 to 2014, sale and distribution of medically important antimicrobials used on farms also jumped—an increase of 23 percent.

That brings the 2014 total of antimicrobials sold for US livestock to 15,358,210 kilograms, including 9,475,989 kilograms of medically important drugs, according to the report.

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