The E. Coli outbreaks that have become so prevalent overseas lately are enough to make one’s spinach wilt at the mere thought. It does soldify in my mind one simple lesson for the home gardener :
NEVER put fresh manure on your vegetable garden. ALWAYS make sure it is composted well, with lashings of lime.
Also foragers beware. With the amount of fecal matter escaping from this country’s bovine masses, cooking the greens you source from riverbanks might be a mighty clever idea. The CDC says E. coli in spinach can be killed by cooking at 70°C for 15 seconds. (Water boils at 100°C.)