Page 25 - Topigs Norsvin 0505

# & !"2000 SPF # 1-4-7

PRRS challenge trial in USA: Over 2000 SPF pigs inoculated with PRRS 1-4-7 strain

Individual samples collected

Body weight Fecal sample Blood sample Clinical score
$

Inoculation Peak clinical disease Viral clearance
' %

Day post-infection

-1 0 7 13 21 28 35 42 … Market

Clinical Clinical
score score