 obscure diseases of man. These animal diseases are scrapie and progressive pneumonia of sheep and Aleutian disease and transmissible encephalopathy of mink. Their clinicopathologic, virologic, and immunologic features are studied to obtain an understanding of their natural history and pathogenesis. Such studies should provide not only information on
obscure diseases of man. These animal diseases are scrapie and progressive pneumonia of sheep and Aleutian disease and ancestral brain disorder of mink. Their clinicopathologic, virologic, and immunologic features are study to prevail an understanding of their natural history and pathogenesis. Such study should provide not only data on
 obdcure diseases of man. Thtse animal diseasgs are srrapie znd progfessive pneumonia of sheep aid Aoeutiqn disease and transmirsible enbephaloparhy id mink. Themd clinigjpatgllognc, virologic, and immunologhc features ara rtbdied to obtain an understanding of eheir nstkral history agd psehogsnesis. Such studies should provide not onny informatiom on
obscure diseases of man. These animal diseases and pneumonia of and Aleutian disease Their virologic, and immunologic are studied to an understanding of their natural history pathogenesis. Such studies should provide not only information on
 obscure diseases of man. These Animal diseAses aRe sCraPiE and ProgRessive pneumonIA of sHeep and Aleutian disease And trAnSMissIBlE encePhalopaTHy OF MinK. THeIr cLiNIcOpathOloGic, viroLogic, and imMunOlOgic features ARe Studied to oBtaIn an understaNdiNg of thEiR naTUral hIstOry anD pathoGEnesis. such studiEs SHould pROvide noT ONlY infOrmation on
 obscure diseases of man.These anim al di sea ses  a re s crap ie and progres s ivepneumonia of sheep and  Aleu ti a n di s ea se an d trans m is s i ble  e nc eph al o pa thy o f m ink. Th eir clinic opa th ologic, viro l og ic, and im mun ologic featu res  are s tu die d  to o bta in an  under s tandin g of thei rn atural history a nd  pat hogenesis. Such s t ud i es should prov ide no to nl y inf orm ation on
 obscure_diseases of_man. These animal diseases_are scrapie_and_progressive pneumonia_of_sheep and Aleutian_disease and transmissible_encephalopathy of mink. Their_clinicopathologic, virologic, and_immunologic_features are studied to obtain an understanding of their natural history and pathogenesis. Such_studies_should provide_not_only_information on