enquête (1) animal (1) ferme (exploitation) (1) maladie (1) adulte (1) Causes (1) Causative (1) Control (1) Prevention (1) Chlamydia (1) Zoonoses (1) Vaccination (1) Sheep (1) Serology (1) Milk plants (1) Flock (1) Farms (1) Dairy plants (1) Blood (1) Abortion (1) Vaccination (1) Number (1) adulte (1) avortement (1) maladie (1) exploitation agricole (1)