"
Organic farmers even spread the poop around the field on purpose."
Funny, that word, organic. The old timers used animal manure on farms. Today, cattle farmers continue to spread manure on hay fields. If composted properly, even human manure can safely be used to grow vegetables for human consumption. Chapter 7, on parasites
The Humanure Handbook. See the download link (PDF) to the right of each chapter for reading the book free. Chapter 7, on "Worms and Disease," is especially interesting. Roundworm eggs, the toughest bugs in human manure, croak within 24 hours at 30 degress below zero, Celsius (-22, F). The author has over 30 years of study and practice experience with "humanure."