Fig. 3

Relationship between viral load in the serum and viral load in the nasal mucus (log₁₀TCID₅₀) for all Shedder pigs (n = 177 pigs) at 7 dpc_S (a), 9 dpc_S (b) and 13 dpc_S (c). SC: Shedder combination; SIG: Shedder infection group; R+: one copy of the WUR resilience allele; R−: no copy of the WUR resilience allele; light green, SC1, replicate 1; dark green, SC1, replicate 2; dark purple, SC22, replicate 1; light purple, SC2, replicate 2); small symbol: zero log₁₀TCID₅₀; medium symbol: greater than 1 and less than 2 log₁₀TCID₅₀; large symbol: > 2 log₁₀TCID₅₀); closed circle: R+, one copy of the WUR resilience allele; open circle: R−, no copy of the WUR resilience allele. SIG1 were exposed to the barcoded PRRSV-2 and SIG2 were exposed to the identical PRRSV-2 without the barcode