Parasites & Vectors

Table 4 Toxicity of Bacillus thuringiensis israelensis (IPS82) to 3rd instar Aedes aegypti larvae from sampled populations

From: The susceptibility of Aedes aegypti populations displaying temephos resistance to Bacillus thuringiensis israelensis: a basis for management

				LC₅₀^a	LC₉₀^a
Samples	Origin	Temephos status^b	No. larvae	Mean (95% fiducial limits)	RR^c	Mean (95% fiducial limits)	RR^c
Rockefeller	Laboratory	S	1620	0.008 (0.007-0.009)	1.0	0.026 (0.021-0.036)	1.0
F. de Noronha	Field	S	1140	0.013 (0.011-0.015)	1.6	0.030 (0.024-0.042)	1.2
Bacabal	Field	MR	1140	0.014 (0.012-0.016)	1.8	0.043 (0.035-0.058)	1.7
Recife	Field	MR	1440	0.015 (0.014-0.018)	1.9	0.027 (0.024-0.031)	1.0
Macapá	Field	HR	1380	0.012 (0.011-0.014)	1.5	0.031 (0.027-0.038)	1.2
João Pessoa	Field	HR	1380	0.011 (0.009-0.012)	1.4	0.035 (0.027-0.049)	1.3
Salgueiro	Field	HR	1080	0.015 (0.012-0.018)	1.9	0.025 (0.021-0.031)	1.0
G. do Goitá	Field	HR	1080	0.015 (0.013-0.018)	1.9	0.025 (0.022-0.033)	1.0
Oiapoque	Field	HR	1440	0.011 (0.004-0.012)	1.4	0.026 (0.021-0.030)	1.0
Cedro	Field	HR	1200	0.012 (0.010-0.015)	1.5	0.031 (0.024-0.068)	1.2
A. da Ingazeira	Field	HR	1260	0.017 (0.016-0.020)	2.1	0.030 (0.026-0.035)	1.2
S. J. do Egito	Field	HR	1200	0.011 (0.010-0.013)	1.4	0.030 (0.024-0.038	1.2
S. C. do Capibaribe	Field	HR	1260	0.009 (0.008-0.010)	1.1	0.025 (0.018-0.051)	1.0
Agrestina	Field	HR	1320	0.017 (0.016-0.019)	2.1	0.028 (0.026-0.032)	1.1
Araripina	Field	HR	1440	0.013 (0.012-0.015)	1.6	0.035 (0.029-0.045)	1.3

^aLethal Concentrations (mg/L) for 50% (LC₅₀) or 90% (LC₉₀) of larvae after 24 h. ^bClassification adapted from Mazzari and Georghiou (1995): S-Susceptible (RR < 3), LR-Low Resistance (3 < RR < 5), MR-Moderate Resistance (5 < RR < 10), HR-High Resistance (>10).
^cResistance Ratio: LC for sample tested/LC for the Rockefeller reference colony.

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ISSN: 1756-3305

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