The St. Louis Zoo is grappling with a second case of a potentially deadly strain of herpes that first struck an elephant calf more than a week ago. Tests show Maliha, 2, has the same elephant endotheliotropic herpesvirus, or EEHV, that was diagnosed earlier this month in her half sister Jade. Jade's stable condition is almost as surprising as Maliha's diagnosis. There is no cure or vaccine for EEHV