Location of the fish farm and of the sampling stations.

<p>The map is from <a href="http://earthobservatory.nasa.gov/" target="_blank">http://earthobservatory.nasa.gov/</a>, image courtesy Jesse Allen.</p

Resistance genes detected before and after sediment incubation in antibiotic-supplemented BHI broth.

*<p>detected both in sediment and in broth.</p

Primer pairs used to detect resistance genes in PCR assays.

<p>Primer pairs used to detect resistance genes in PCR assays.</p

Control strains used in PCR assays.

a<p>American Type Culture Collection.</p

Abundance of benthic enterococci.

<p>Enterococcal abundance in the farm sediments and at the control site was determined by qPCR before and after incubation with antibiotic-supplemented BHI broth. A, St. 1; B, St. 2 and C, St. 3. *Not detectable i.e.</p