Fig. 1From: Coinfection with Haemophilus parasuis serovar 4 increases the virulence of porcine circovirus type 2 in pigletsSerum PCV2 viral loads in the infected piglets. The amounts of PCV2 in serum were determined by real-time PCR and expressed as the mean logarithm of PCV2 ORF2 DNA copy numbers per milliliter (n = 6 in each group). Error bars represent standard deviations. *p < 0.05Back to article page