James, J.E.; James, D.M.; Martin, P.A.; Davis, D.L.
(Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1982)
Embryos were transferred from two pseudorabies infected herds to recipients
from a pseudorabies free herd. All 38 donor sows had serum titers for pseudorabies but no recipients or pigs that were farrowed had clinical signs ...