Figure 4From: Concurrent infection with porcine reproductive and respiratory syndrome virus and Haemophilus parasuis in two types of porcine macrophages: apoptosis, production of ROS and formation of multinucleated giant cells Growth of H. parasuis on MDMs (A) or PAMs (B) was measured by spectrophotometry (A 600 nm). Mock curves serve as a baseline which includes cell debris from cultivated macrophages after freezing and thawing process. Data are presented as mean with SEM of three animals measured in culture duplicates. Significant differences between co-infected cells and cells infected with H. parasuis only are denoted by *(p < 0.05).Back to article page