title: Incidence of Maedi (chronic progressive interstitial pneumonia) among sheep in Hungary;.
mesh_terms: D000818:Animals; D002417:Cattle; D002908:Chronic Disease; D005260:Female; D006814:Hungary; D011016:Pneumonia, Atypical Interstitial, of Cattle / Q000453:epidemiology* / Q000473:pathology*; D012756:Sheep