Figure 4

Hydrogen peroxide (H2O2) level in carp HK leukocytes and CLC cells exposed to different concentrations ranging from 2.25 to 20 μM of thiacloprid (THI; a), imidacloprid (IMI; b) and their main metabolites: thiacloprid amide (THI-A; c) and desnitro-imidacloprid (DN-IMI; d) for 24 h. Values are expressed as mean ± SE. The asterisk represents a statistical difference at p˂ 0.05.