TABLE 3.

Pathogenicity of spores from B. thuringiensis wild-type and mutant strains injected into hemocoel of immunized B. mori larvae

Strains	LD50 (no. of spores/ injected larva)a
	Mean	95% CIb
407 Cry−	11.94	7.47-15.39
407 Cry− ΔinhA	9.49	4.85-12.85
407 Cry− ΔinhA2	14.56	5.61-20.81
407 Cry− ΔinhA ΔinhA2	9.22	7.34-10.89

^aValues are LD₅₀s calculated by log-probit analysis at 24 h after infection.

^b95% confidence intervals (14).