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Show Mysterious X Disease' Termed Serious Threat "Hyperkeratosis" is the jaw-breaking 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 disease" and "double X disease," 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 products. prod-ucts. One symptom of the disease is a marked thickening of the skin. So far, efforts to transmit It and to treat It with drugs have been unsuccessful. un-successful. Agriculture department scientists are cooperating with specialists of several southeastern states In an intensive study of the disease. |