Co-expression of Ubiquitin gene and capsid protein gene enhances the potency of DNA immunization of PCV2 in mice

Table 3 Viraemia in mouse serum measured by quantitative PCR

group	No. of mice with viraemia/no. tested (mean lg PCV2 load ± SD) at the following weeks p.c.
	2	4	6	8
Vector	7.56 ± 1.05^a	7.12 ± 0.29a	6.27 ± 0.27^a	5.77 ± 0.23^a
pc-Cap	5.59 ± 0.51^b	3.93 ± 0.18^b	3.41 ± 0.51^b	2.69 ± 0.33^b
pc-Ub-Cap	3.97 ± 0.45^c	3.00 ± 0.55^c	2.45 ± 0.48^c	0c

Shared letters above columns indicate no significant difference (P > 0.05), whilst different letters indicate significant differences among the groups (P < 0.05) (n = 5).
A load value of 0 is equal to < 10² copies ml^-1 (the threshold of sensitivity of the quantitative PCR).

ISSN: 1743-422X