Enzyme-Linked ImmunoSorbent Assay (ELISA)
ELISA tests are used for the detection of serum or oral fluid antibodies. It is easy, rapid and cheaper compared to other assays.
At present, there are many commercially available ELISA kits for detection of PRRS virus-specific antibodies; some of them have the ability to identify antibodies against both PRRSV1 and PRRSV2; others can distinguish the species. Recently, some ELISAs have been also adapted to testing oral fluid samples.