Efficacy of single dose of an inactivated porcine circovirus type 2 (PCV2) whole-virus vaccine with oil adjuvant in piglets

Table 3 Demonstration of PCV2 by immunohistochemistry at the necropsy performed 28 days after the intranasal and intramuscular inoculations of the pigs with PCV2, shown as the number of PCV2-positive pigs and mean scores

Groups		Body organ
	Superficial inguinal lymph nodes	Mesenteric lymph nodes	Tonsils	Spleen
Presence of PCV2
Vaccinated group	2 of 5	2 of 5	1 of 5	1 of 5
Control group	5 of 5	5 of 5	4 of 5	3 of 5
Mean score
Vaccinated group	0.40 ± 0.55	0.40 ± 0.55	0.20 ± 0.45	0.20 ± 0.45
Control group	2.40 ± 0.55*	2.00 ± 0.71*	1.00 ± 0.71	0.80 ± 0.84

Values in parentheses are the mean estimated amounts of the PCV2 antigen in lymphoid tissues (range: 0, no antigen detected; 3, high amounts of antigen). * indicates a difference in the mean value scores between the groups (P < 0.05).

ISSN: 1751-0147