title: [Problems in studying infectious diseases in animals being raised commercially].
mesh_terms: D000820:Animal Diseases / Q000276:immunology / Q000517:prevention & control*; D000822:Animal Husbandry; D000818:Animals; D000829:Animals, Domestic; D002031:Bulgaria; D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000276:immunology / Q000662:veterinary*; D012106:Research; D014586:USSR
vernacular_title: Vŭrkhu niakoi problemi po izuchavaneto na infektsioznite zaboliavaniia po zhivotnite pri promishlenoto im otglezhdane.