00326nam a2200121Ia 4500008004100000022001400041040001100055100002000066245002400086260006700110300001700177300001000194251112s9999||||xx |||||||||||||| ||und||  a0022-538x  aCNCLSA  aThomas E. Shenk 0aJournal of Virology  cSeptember, 1999bAmerican Society for MicrobiologyaWashington  aP. 7099-7922  bV. 73