easier and less cost effective sample collection. However, there
is only few information about the quantity of virus-specific antibodies
in oral fluids of infected pigs [14] and the development
of oral fluid-based assays and the PRRS evaluation of their results
has only started recently [15]. So, at present time, blood
samples collection remains a precious tool for PRRS
surveillance and virus circulation, even if clinical form rate
decrease. Nevertheless, the offspring evaluation of serum
profiles on affected herds, whereas vaccinated sows, was not
sufficiently reported.