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From 2003 through 2008, the consumption of tetracyclines per pig produced increased by 118% in weaning pigs and 40% in fi nishers. The results presented in this report indicated that the majority of the increase was associated with weaning pig herds receiving 10 or more prescriptions of tetracyclines per year. These results indicate that a subset of herds housing approximately 21% of the weaning pigs, accounted for a major part of the increasing consumption of tetracyclines during 2003–2008.
http://www.danmap.org/pdfFiles/Danmap_2008.pdf
