A recent study from University of Canterbury in New Zealand shows that glyphosate (Roundup) and other commonly used herbicides can make bacteria quickly adapt and resist antibiotics like ampicillin and tetracycline. Glyphosate, 2,4-D (dioxin) and dicamba (recently approved by the FDA) appear to disable the antibiotics and trigger bacterial resistance to them.
Researchers tested E. coli and Salmonella, two of the most deadly and widespread bacteria in the world, and consistently replicated their results
The dosage required to induce antibiotic resistance was small, comparable to the concentration found in household use or agriculture, but higher than the concentration of incidental residue found in food. However researchers cautioned that people could easily reach this threshold by consuming large quantities of food with small amounts of residue, through children and pets exposed to weed killers used on lawns or via livestock pastured in spray drift zones.
Growing antibiotic resistance is already increasing the death rate from untreatable infectious disease. Epidemiologists estimate drug resistant bacteria kill roughly 23,000 Americans annually.
Given established links between glyphosate, dioxin, dicamba and cancer, this new evidence linking them to antibiotic resistance will only increase global pressure for them to be banned.