News Yuma Researchers Take To The Fields To Track Down Food-Borne Pathogens KJZZ | By Maya Springhawk Robnett Published January 30, 2017 at 10:57 AM MST Facebook LinkedIn Email Listen (Photo by Maya Springhawk Robnett - KAWC) Dr. Paula Rivadeneira sets out a bucket of water to collect dust which may be carrying pathogens. Efforts to protect the country's agricultural crops from pathogens and other threats requires some unusual practices in the fields of Yuma.