ADCC killing of Trichinella spiralis newborn larvae. A: rTsSPc enhanced macrophage cytotoxicity. RAW264.7 macrophages were first stimulated with 25 μg/mL of rTsSPc at 37 °C for 24 h, and incubated with T. spiralis infection serum and 100 newborn larvae (NBL) for 36 h. B: The macrophages were pretreated with specific p-NF-κB p65 inhibitor PDTC for 2 h, and then stimulated with rTsSPc for 24 h, finally incubated with infection serum and NBL. Each test had three replicates. ^*p < 0.05 compared to the DMEM group. ^#p < 0.05 between the two groups. Scale bar: 50 μm.