exposition (6) Swine (6) Human beings (6) Control (5) Farmers (5) risque (4) animal (4) santé (4) ferme (exploitation) (4) Risk (4) Health (4) Communities (4) Animals (4) Transmission (4) Health (4) résistance (4) exploitation agricole (4) puits (3) Composition (3) Genes (3) Farms (3) Escherichia coli (3) Design (3) Bacteria (3) Addition (3) Design (3) Influence (3) surveillance (2) santé publique (2) analyse (2)