MARCH-APRIL 2018 FPT food protection trends Vol. 38, No. 2 | ISSN: 1541-9576 | Periodicals 6200 Aurora Avenue, Suite 200W, Des Moines, Iowa 50322-2864, USA Visible Soil as an Indicator of Bacteria Concentration on Farmworkers' Hands SCIENCE AND NEWS from the International Association for Food Protection