Table 6.

Established oral and inhalational LD₅₀ values

	Oral			Inhalation
Toxin	LD50 (μg kg −1)	Relevant clinical detection levela (ng mL−1)	Relevant detection level in 100 mL food (μg kg −1)	LD50 (μg kg−1)	Relevant clinical detection levela (pg mL−1)	Reference
BoNT	1	14	0.7	0.003	42	1
Ricin	10 000	140 000	7000	3	42 000	73 and 74
SEBb	—	—	—	0.02	280	32
Stx-1c	8	112	5.6	8	112 000	75
Stx-2c	0.29	4	0.2	0.29	4000	76

^aRelevant clinical detection level calculated as the minimal concentration of toxin to detect an exposure equivalent to the LOD assuming an average weight person (70 kg) with 5 L of blood in circulation.

^bFor SEB, the oral LD₅₀ value has not been reported.

^cFor Stx-1 and Stx-2, the oral and inhalational LD₅₀ values are based upon the intraperitoneal LD₅₀.