Cho, JennyDee, ScottDeen, JohnFaaberg, Kay2013-01-142013-01-142005-09-17https://hdl.handle.net/11299/142573en-USswinepigherd healthThe influence of animal age, bacterial co-infection and porcine reproductive and respiratory syndrome virus (PRRSV) isolate pathogenicity on virus load in individual pigsConference Paper