Skip to main content
Fig. 1 | Porcine Health Management

Fig. 1

From: Initial vaccination and revaccination with Type I PRRS 94881 MLV reduces viral load and infection with porcine reproductive and respiratory syndrome virus

Fig. 1

Percentage of PRRSV RNA-positive gilts after challenge with PRRSV strain 190,136. Viral load was assessed using RT-qPCR. All gilts were challenged with PRRSV strain 190136 on Day 91. Prior to challenge (Day 0–91), 0% of gilts were PRRSV RNA-positive. On Day 94, 100% tested positive for PRRSV RNA. The percentage of PRRSV RNA-positive gilts then declined sharply in both the revaccination and single-vaccination groups. By Day 98 both vaccination groups had significantly lower percentages of PRRSV RNA-positive gilts than the challenge control group (P < 0.0001). Challenge control group (n = 16); Revaccination group (n = 16); Single-vaccination group (n = 16). aP < 0.0001 for challenge control vs revaccination group; bP < 0.001 for challenge control vs single-vaccination group; cP < 0.05 for revaccination group vs single-vaccination group

Back to article page