On the other hand, we also preliminary tested the effect of neutralizing LTB4 receptor by using a polyclonal antibody (1 μg/ml) targeting BLT2 in the uptake of the bacteria into RAW264.7 cells at 0 and 30 min post-infection and the results showed that lower number of bacteria entered the cells at 30 min post-infection (Fig. 2C). The gene discussed is LTB4R2; the disease is infection.