Fig. 3From: Longitudinal piglet sampling in commercial sow farms highlights the challenge of PRRSV detectionFARM C. PRRSV RNA detection (,) by week (W), farrowing room (R), and specimen (P - processing fluid, F - family oral fluid). aNo. RNA positive samples (+) and no. samples collected (∑). PRRSV RFLP 1–3-2 (Fostera-like) detected. PRRSV RFLP 1–7-4 detected on week 20 (data not shown). PRRSV RFLP 1–10-4 detected on week 27 (data not shown)Back to article page