Table 1. LD₅₀ values from Micrurus venoms studied herein, compared with literature data.

	Micrurus species
Source	dumerilii	mipartitus	isozonus	surinamensis	medemi	lemniscatus	spixii
This study	23.72	33.62	6.29	29.17	8.79	22.87	13.89
	(18.09–31.12)	(26.15–43.22)	(5.14–7.69)	(24.42–34.84)	(7.16–10.80)	(17.79–29.4)	(N.D.)
Bolaños et al. [37]	17.00	-	-	5−10	-	5*	10−15*
	(N.S.)			(N.S.)		(N.S.)	(N.S.)
Tanaka et al.[16]		-	-	58**	-	13**	8**
				(43–87)		(7–22)	(6–16)
Silva[38]		-	-	9.43	-	10.12	50.6
				(N.S.)		(N.S.)	(N.S.)
Cohen [14]	16.3	-	-	-	-	-	27.3***
	(N.S.)						(N.S.)
Cohen[13]	11.9	-	-	-	-	-	-
	(N.S.)
Rey-Suarez et al. [23]	22.42	-	-	-	-	-	-
	(14.5–36–1)
Otero et al. [39]	-	9	-	-	-	-	-
		(6.6–9.1)
Oliveira et al. [40]	-	-	-	14**	-	-	-
				(11.3–16.8)
de Roodt et al. [26]	-	-	-	7.6	-	-	-
				(5–19)
de Roodt et al. [41]	-	-	-	20	-	-	-
				(N.S.)
Salazar et al. [42]	-	-	11.4	-	-	-	-
			(N.S.)
Higashi et al. [15]	-	-	-	-	-	-	6.7**
							(N.S.)
Max/Min ratio	1.99	3.74	1.81	11.60	-	4.57	7.55

Values are given in μg/mice (see Materials and Methods for details). 95% confidence intervals are indicated in parenthesis. N.D., not determined because, on the trial doses, only death ratios corresponding to 0% and 100% were recorded; N.S., not specified on the study. Data without asterisk marks correspond to venoms from Colombia;

*unknown origin;

** Brazil;

*** Peru.