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. 2018 Dec 28;13(12):e0209784. doi: 10.1371/journal.pone.0209784

Fig 1. Viraemia in pigs challenged with PRRSV.

Fig 1

a) Percentage of PCR positive pigs challenged with <1.5 log virulent PRRSV strain. b) Percentage of PCR positive pigs challenged with 2 log virulent PRRSV strain. c) Percentage of PCR positive pigs challenged with 3 log virulent PRRSV strain. d) Percentage of PCR positive pigs challenged with 4 log virulent PRRSV strain. MLV = modified-live virus; PCR = polymerase chain reaction; PRRS = porcine reproductive and respiratory syndrome; PRRSV = porcine reproductive and respiratory syndrome virus; TCID50 = 50% tissue culture infectious dose.