Fig. 4

Lateral gene transfer events and integrons in farm samples. Lateral gene transfer events (A) and integrons with at least two ARGs, MRGs, or BRGs found in all samples (B) are shown. Potential integron classes are written in brackets for each gene in accordance with entries in the INTEGRALL database. SFD, swab samples of cleaned feeders and drinkers of empty cleaned pens; SWF, swab sample of walls and floor of the pens prior to introduction of weaned piglets; FW0, faecal samples at the day of weaning; FW1, faecal samples 1 week post-weaning; FW2, faecal samples 2 weeks post-weaning