Isn’t it also the case that a lot of these contaminations in produce (like leafy greens) are caused by animal manure being used to fertilize the produce?
Without manure being used the risk is diminished by orders of magnitude.
Maybe so, but how does that explain how E. coli outbreaks on lettuce? From what I understand the waste from animal farms run off into waterways that feed the vegetable farms.
It doesn't seem to rank the causes it lists, but googling it suggests widespread contamination caused by fecal matter runoff from animal ag finding its way into irrigation water.
Here in Canada we have pretty heavy application of manure, primarily in spring and fall. It's part of how we replenish soils at small and large scales.
I suspect we rarely grow greens immediately after applications, but to say only backyard operations use animal manure isn't true.
Without manure being used the risk is diminished by orders of magnitude.