FIG. 4.

Surviving B. thuringiensis cells after incubation with hemolymph from immunized B. mori larvae. The reaction mixture contained 200 μl of hemolymph and 20 μl of a suspension containing about 7 × 10⁴ viable cells. Aliquots were withdrawn at the time points indicated and the surviving bacteria were counted. Experiments were repeated three times. Vertical bars indicate the standard error of the mean.