Show Mysterious X X Disease Termed Serious Threat Is the jaw- jaw breaking name of a baffling cattle disease now causing trouble on thousands of farms particularly In southeastern states Known also by the simpler terms of X Y disease and double X Y disease dis dis- ease the new malady has caused serious loss in at least 26 states and poses a serious threat to output of meat milk and other animal prod prod- One symptom of the disease is isa isa isa a marked thickening of ot the skin So far efforts to transmit it and to treat it with drugs have been un un- successful Agriculture department scientists are arc cooperating with specialists of several southeastern states in an Intensive study of ot the disease |