2 4 ii 8 9 10 12 13 14 i5 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 evaluation of the potential for bovine spongiform encephalopathy in united states joshua t cohen keith duggar george m gray silvia kreindel harvard center risk analysis school public health hatim abdelrahman tsegaye habtemariam david oryang berhanu tameru computational epidemiology college veterinary medicine tuskegee university november 200l revised october 2003 31 acknowledgments 32 33 34 35 36 37 38 40 41 42 43 44 4s 46 47 48 49 50 51 52 53 54 5 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 this project benefited from information and advice many individuals any errors or misstatements are due to authors not contributors gratefully acknowledge alwynelle ah1 usda oracba nathan e bauer fsis paul brown nih linda detwiler aphis w harlan taylor byproducts inc pedro piccardo indiana their scientific input critical review different sections manuscript we