On the occurrence of pseudorabies in Sweden. I. Incidence of latent infections in sows and boars.
D000818:Animals; D002353:Carrier State / Q000662:veterinary*; D005260:Female; D008297:Male; D011557:Pseudorabies / Q000453:epidemiology*; D013548:Sweden; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology*