Figure 1.

Culturable bacteria during antibiotic exposure. (A) Skin and (B) gut.

Notes: First samples are 5.5 h before rifampicin exposure began (control). Exposure started at time zero, and lasted 165 h (indicated by red bar), so the last three timepoints are 20.5, 165.5, and 400.5 h (skin only) after antibiotic removal by water change, respectively. No colonies were recovered on rifampicin-containing plates at the 5.5- and 17.5-h timepoints from skin. Scales of axes for panels (A) and (B) are identical, for ease of comparison. Viability is reported in CFUs/g of fish weight.

Abbreviations: CFU, colony-forming unit; NA, nutrient agar; rif-NA, rifampicin-containing NA.