Anti-idiotypic antibodies reduce efficacy of the attenuated vaccine against highly pathogenic PRRSV challenge

BMC Veterinary Research

Table 2 Virus quantity in serum samples detected on different DPCs

DPCs	Virus quantity from six groups of piglets¹
	1	2	3	4	5	6
0	0 (6)	0 (6)	0 (6)	0 (6)	0 (6)	0 (6)
3	7.3 ± 0.3 (6)^a	7.9 ± 0.6 (6)^a	5.5 ± 0.3 (6)^b	5.3 ± 0.2 (6)^b	5.8 ± 0.2 (6)^b	0 (6)
7	8.0 ± 0.2 (6) ^a	8.4 ± 0.4 (6) ^a	6.2 ± 0.3 (6) ^b	6.0 ± 0.4 (6) ^b	7.5 ± 0.3 (6) ^a	0 (6)
10	7.1 ± 0.2 (6)^a	7.5 ± 0.3 (6)^a	6.0 ± 0.4 (6)^b	5.8 ± 0.4 (6)^b	8.2 ± 0.2 (6)^a	0 (6)
14	6.0 ± 0.6 (6)^a	6.4 ± 0.5 (6)^a	4.8 ± 0.5 (6)^b	5.0 ± 0.5 (6)^b	7.2 ± 0.4 (6)^a	0 (6)
21	2.7 ± 1.3 (2)²	3.0 ± 0.7 (2)	0 (3)	0 (3)	2.3 ± 2.3 (2)²	0 (3)

¹Each number represents the mean virus copies/ml (log₁₀) (±S.D.) generated from six groups of piglets on different DPCs and analyzed with ANOVA.
²Same as that in Table 1.
^{a, b}Values with different superscripts were significantly different (P < 0.05).

ISSN: 1746-6148