Insecticide susceptibility of Anopheles stephensi to DDT and current insecticides in an elimination area in Iran

Table 1 Probit regression line parameters of An. stephensi exposed to DDT (4 %) and Lambda-cyhalothrin (0.05 %) in southeastern Iran

Insecticides	A	B ± SE	LT₅₀ 95 % C.I. (min)	LT₉₀ 95 % C.I. (min)	χ ² (df)	P-value
DDT (4 %)	-4.097	1.94 ± 0.246	130.25	597.35	5.23 (3)	> 0.05
Lambda-cyhalothrin (0.05 %)	-7.33	4.65 ± 1.096	37.71	71.12	16.44 (2)	< 0.05

Abbreviations: A, intercept; B, slope; SE, standard error; LT₅₀, 95 % CI, lethal time causing 50 % mortality and its 95 % confidence interval; LT₉₀, 95 % CI, lethal time causing 90 % mortality and its 95 % confidence interval; χ ², heterogeneity about the regression line; df, degrees of freedom

ISSN: 1756-3305