Laquinimod Phase IIa Study in Active Crohn's Disease

Inclusion Criteria: 1. Subjects diagnosed with Crohn's disease for at least 3 months prior to screening. 2. Moderate to severe Crohn's disease patients as determined by the CDAI score Exclusion Criteria: 1. Subjects who have had recent bowel surgery 2. Subjects with clinically significant GI obstructive symptoms 3. Subjects with a clinically significant or unstable medical or surgical condition 4. Subjects with unstable doses of standard of care medications (5-ASA, antibiotics, oral corticosteroids, immunosuppressants ) 5. Women who are pregnant or nursing or who intend to be during the study period. 6. Women of child-bearing potential who do not practice an acceptable method of birth control