Show mysterious 7 X disease tem termed ed serious threat I 1 hype ikera tos Is Is the name of a baffling cattle disease now causing bouble on thousands of farms particularly in southeastern states known also by the simpler terms of X disease and double X disease the new malady has caused serious loss in at least 20 states and poses a serious threat to output ol of meat milk and other animal products one symptom of the disease la is a marked thickening of the skin so far efforts to transmit it and to treat it with drugs have been unsuccessful agriculture department scientists are cooperating with specialists ol 01 several southeastern states in an intensive study of the disease |