Fig. 6

Scores of gross lung lesions, microscopic lung lesions and IHE of the infected piglets. (A) The mean scores of the gross lesions of the lungs in each group. Gross lesions were scored based on the percentage of lung area affected. (B) The mean scores of the microscopic lung lesions in each group. (C) Scores of IHC of piglets inoculated with PRRSV. Data are expressed as the Mean ± SD (error bars) of each group. Asterisk indicates significant differences between the FJLIUY-2017- inoculated group and PRRSV2/CN/G8/2018-inoculated group (*p < 0.05). Note: G8 denotes PRRSV2/CN/G8/2018