Figure 1From: Characterization of homologous and heterologous adaptive immune responses in porcine reproductive and respiratory syndrome virus infection Rectal temperature and body weight gains after inoculation with PRRSV. Evolution of average rectal temperatures and body weight gains in experiments 1 (figure a-c) and 2 (b-d). In experiment 1, animals received initially (day 0 pi) PRRSV strain 3262 (A; black crosses, light grey bars) or were mock-inoculated (Control; empty circles, empty bars). At day +84 pi, four pigs were challenge with strain 3262 again (A + A; black triangles, black bars) or received a heterologous challenge with strain 3267 (A + B; grey rhombus or dark grey bars). Naïve pigs were challenged with strain 3267 (C1 + B; empty squares or diagonal line bars). In experiment 2, pigs were initially inoculated with strain 3267 (B) and later challenged with 3267 (B + B) or 3262 (B + A). Controls were included (Control and C2 + A). Significant (p < 0.05) differences in body temperatures are marked with an asterisk. For weight gains (right side of the figure), bars with a letter above show significant (p < 0.05) differences.Back to article page