FIG. 2.

Detection of SPPV in nasal secretions of lambs at 0 to 8 days postinoculation. Bars represent body temperature (°C), and the solid horizontal line indicates the cutoff temperature of 39.7°C, above which lambs were considered febrile. Arrows indicate the first day that clinical signs were evident. Empty bars represent samples that were negative both by real-time PCR and VI. Hatched bars represent samples that were positive by real-time PCR but negative by VI. Filled bars represent samples that were positive by both real-time PCR and VI.