a decreasing trendP < 0.0001
The inhibition effects of immune sera had a correlation with dilutions of anti-rTsDNase II-1 serum ( r = -0.881, P < 0.0001) and anti-rTsDNase II-7 serum ( r = -0.891, P < 0.0001) and exhibited a decreasing trend with a serum dilution increase ( F 1 = 20.749, F 2 = 27.655, P < 0.0001).