Fig. 1.

Viability of PCV2-infected cells assessed by flow cytometry. EAhy926, PK-15, Vero and HEK293 cell lines and primary cell culture of swine kidney (ST) were infected with 2 log₁₀ virus copies and cell viability assessed 72 h post-infection. Results are expressed as mean ± SEM of twelve biological replicates of uninfected control cells (open bars) and PCV2-infected cells (black bars). Statistical analysis was performed using Student's t-test for unpaired samples, comparing infected and non-infected cells (*p < 0.05).