The Union Health Minister Harsh Vardhan said today that Atlanta-based CDC (Centers for Disease Control and Prevention) will be requested to help in the Bihar encephalitis case. They are requested to test theblood samples of children affected by AES (Acute Encephalitis Syndrome) which has taken the death toll to 130 in Bihar. Mr Vardhan told reporters 'This encephalitis disease in Bihar is still a mystery to be solved. We are unaware about the exact cause of the disease. I will request the world-famous CDC institute based in Atlanta to test the blood samples of the infected children and find out