TABLE 2 

Fold changes in antibiotic concentration to cause a 1,000-fold change in the EOP in the presence of a herbicide

AntibioticHerbicideFold change in antibiotic concn with:
E. coliaS. Typhimurium
AmpKamba02.33
2,4-D1.52
RoundupNA0
CamKamba22.2
2,4-D02.33
Roundup1.52.5
CipKamba1.662.66
2,4-D1.661.66
Roundup1.85.8
KanKamba2.52.5
2,4-D1.51.2
RoundupNA5
TetKamba23.33
2,4-D1.662.5
Roundup31.66
  • a NA, not applicable (the EOP did not drop below 0.001 at the highest tested concentration).