ferme (exploitation) (2) maladie (2) Milk plants (2) Farms (2) Dairy plants (2) Blood (2) maladie (2) exploitation agricole (2) test (1) enquête (1) mise sous écran protecteur (1) santé publique (1) animal (1) production animale (1) information (1) histoire (1) danger (1) adulte (1) Deterioration (1) Causes (1) Causative (1) History (1) Control (1) Area (1) Prevention (1) Programs (1) Area (1) Animal feeding (1) Chlamydia (1) Technique (1)