Fig. 2. Changes in interleukin-1beta (IL-1β) and IL-10 levels after porcine circovirus type 2 (PCV2) infection. Supernatants from control cultures and porcine alveolar macrophages cultured with PCV2, MyD88 small interfering (si)RNA, or a combination of both were sampled after 6, 12, 24, and 48 h and were underwent enzyme-linked immunosorbent assay to measure the concentrations of IL-1β and IL-10; ^*p < 0.05, ^**p < 0.01.