Cattle in this country are fed corn, which upsets their stomachs, so they are given antibiotics, which end up in the beef we eat. Fertilizer made from the manure from these cattle?and other food animals treated with antibiotics?may also put antibiotics into the vegetables we eat. The danger in all this is that it could lead to antibiotic-resistant superbugs.
The USDA has been evaluating the impact of antibiotic feeding in livestock production on the environment, trying to figure out whether food crops accumulate antibiotics from soils spread with manure that contains antibiotics. The irony is that it’s organic farming that relies most heavily on manure fertilizer. In fact, it’s mandated if vegetables are labeled “organic.”