THE PHENOMENON OF SUPPRESSED RESPIRATORY DISEASE IN THE LITTERS OF OLDER SOWS.
D000818:Animals; D003140:Communicable Disease Control; D005260:Female; D011014:Pneumonia; D011024:Pneumonia, Viral; D012120:Respiration Disorders; D013552:Swine; D013553:Swine Diseases
COMMUNICABLE DISEASE CONTROL; PNEUMONIA, VIRAL; SWINE DISEASES