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Changes of indicators for lung edema. Lung and serum samples were collected on days 0, 3, 5 PI and moribund. Lung wet-to-dry weight ratios (A), histamine (B), platelet activation factor (C), and leukotriene B4 (D) were measured by the methods described in Materials and methods. Data were shown as means ± SD from 3 pigs each group. *p < 0.05 and **p < 0.01 between control and virus infection groups. #p < 0.05 and ##p < 0.01 between HB-1/3.6- and JXwn06-infected groups.
