Figure 8From: First construction of infectious clone for newly emerging mutation porcine circovirus type 2 (PCV2) followed by comparison with PCV2a and PCV2b genotypes in biological characteristics in vitroGrowth curves of the cloned virus strains after a series of passages. The virus titers increased with the number of passages. The virus titers strikingly increased since the second passage and reached up to 105.7 TCID50/ml at the 10th passage.Back to article page