Swine (9) Animals (6) maladie (5) maladie (5) papier (4) Symptoms (4) Paper (4) virus (3) temps (durée) (3) mortalité (3) information (3) Mortality (3) Diagnosis (3) Control (3) Time (3) Rabbits (3) Percentage (3) Mortality (3) Housing (3) Feeds (3) Examinations (3) Diseases--Causes and theories of causation (3) Diagnosis (3) Average (3) Examinations (3) puits (2) toxine (2) infection (2) santé (2) ammoniac (2)