| PRRS | porcine reproductive and respiratory syndrome virus |
| PRRSV | porcine reproductive and respiratory syndrome virus |
| PRDC | porcine respiratory disease complex |
| ELISA | enzyme-linked immune-sorbent assay |
| RT-PCR | reverse transcription-polymerase chain reaction test |
| ORFs | open reading frames |
| RNA | ribonucleic acid |
| MLV | modified live vaccine |
| MEGA | molecular evolutionary genetic analysis |
| BMCMC | Bayesian Markov chain Monte Carlo |
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