[patlin]

Any c@#p spread on food whether human or animal is dangerous to human health, period. But the fact is, feces/manure is not spread on the produce, it is spread on the ground & worked into the soil prior to planting, thus anything that touches the soil becomes contaminated, from the farm equipment to the hands that work the fields.

[HiTech RedNeck]

Poop existed long before farms, and it’s difficult to keep a range of animals having a range of poops (carnivore to herbivore) out of any low tech farm. Nature mitigates the harm through many mechanisms. Bacteria which survive in soil for weeks are unlikely to be harmful to humans.