Selection of Anopheles stephensi with DDT and dieldrin and cross-resistance spectrum to pyrethroids and fipronil

This study aimed to carry out a malaria situation analysis, species composition and susceptibility levels of the main malaria vector, Anopheles stephensi, to different insecticides in Bashagard. A longitudinal survey was conducted in 2 randomly selected villages in Bashagard. Malaria vectors were sampled by dipping method for the larvae and hand catch, night-biting catch, total catch, and shelter pit collection for the adults. Standard WHO susceptibility tests were used for a variety of insecticides on F1 progeny of An. stephensi reared from wild-caught females. In total, 693 adult anopheline mosquitoes and 839 third and fourth-instar larvae were collected and identified. They comprised 7 species; the most abundant adult and larvae anopheline mosquito was An. dthali (40.7% and 30.5% respectively). An. culicifacies (24.2%) and An. stephensi (16.7%) were the next most common species for adult mosquitoes. An. stephensi was fully susceptible to malathion and pyrethroid insecticides but resistant to DDT and tolerant to dieldrin.

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“…Recent studies have shown that An. stephensi from Bandar Abbas region is the most resistant to DDT [9]. In addition An.…”

Section: Introductionmentioning

confidence: 97%

Vector ecology and susceptibility in a malariaendemic focus in southern Islamic Republic of Iran

Soleimani-Ahmadi

Vatandoost²,

Shaeghi³

et al. 2012

Easter Mediterr Health J

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“…Malaria control activities have been integrated in primary health centers of Iran since 1988 [9]. Resistance of Anopheles stephensi to DDT was first recognized in 1958 [10] and subsequently to dieldrin in 1960 [11] and Malathion in 1976 [12,13]. Many adulticides e.g.…”

Section: Introductionmentioning

confidence: 99%

The Field Practices of Lambdacyhalothrin and Deltamethrin Insecticides Against Adult Mosquitoes of Anopheles stephensi as the Main Vector of Malaria: Residual Effects

Khosravani

Rafatpanah

Amiri

et al. 2017

Zahedan J Res Med Sci

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Background: Various chemical control methods have adopted in anti-malaria interventions. Indoor residual spraying (IRS) has been proven as a candidate in elimination program. On the other hand, resistance to multiple insecticides was implicated as a concern issue in these polices. Pesticides should be evaluated to identify probable resistant and make decision to choose a technique against vectors. Methods:In this cross-sectional study, Bioassay test applied on lambdacyhalothrin WP 10% (0.05 mg a.i. /m 2 ) and deltamethrin WP 5% (0.05 mg a.i./m 2 ) on two surfaces (cement and plaster) against adult mosquitoes of Anopheles stephensi according to WHO criteria to measure the residual activity in Saravan county, southern Iran. Overall, 3960 mosquitoes was used in our research. The mortality rates of An.stephensi Liston (Diptera: Culicidae) measured between selected surfaces and insecticides in several times. Data analyzed by Mann-Whitney (nonparametric test) using SPSS v22 statistic software.Results: This paper illustrated that maximal course of residual efficacy was about 3 months. No statistically significant different was exhibited between type of surface within mortality rates of An. Stephensi (P = 0.724) but lambdacyhalothrin has more durability than deltamethrin Conclusions:We established that lambdacyhalothrin can be used into control and elimination setting of malaria with two rounds of spray at an interval of 3-4 months in south of Iran.

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“…The chemical control of vectors now is restricted to endemic malarious areas of south-eastern part of the country with Deltamethrin and residual spraying and long lasting permethrin impregnated nets (Olyset) for personal protection, while biological control is conducting by Bacillus thuringiensis as larvicide. There are different aspects of malaria including insecticide resistance monitoring [4][5][6][7][8][9][10][11][12][13][14][15] , novel methods for vector control [16][17][18][19][20][21][22][23][24][25][26][27][28] , using bednets and long lasting impregnated nets [29][30][31][32][33][34][35] , vector control [36] , repellent evaluation [37] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of residual effects of deltamethrin wg250 on different surfaces against An.stephensi, in a malarious area, southern Iran

Vatandoost

Abai

Dorzadeh

et al. 2020

Preprint

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Objective: Malaria is one of the public health problem in southern Iran. The main activity of vector control is indoor residual spraying using pyrethrpids. The aims of study was to evaluate the biological assays of deltamethrin WG250 at different surfaces of wall.Materials and methods: The persistency of deltamethrin WG250 at 25 mg/m2 was studied on different local surfaces of rooms such as plaster and mud surfaces (sorbent) as well as wooden and thatch roofs (as non-sorbent). Contact bioassays were carried out using WHO standard cones and lab-bred sugar-fed, 48-72 h old females of Anopheles stephensi (Iranshahr strain). In contact bioassays carried out on sprayed surfaces for 150 days, Results and discussion: deltamethrin WG250 (25 mg/m2) caused 43.43-100.0% on sorbent surfaces and 61.11-100.0% on non-sorbent surfaces and persist about 3.5 months in the environmental condition of Saravan district. The fumigant bioassay of deltamethrin WG250 revealed 50-100% mortalities after one month.

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Selection of Anopheles stephensi with DDT and dieldrin and cross-resistance spectrum to pyrethroids and fipronil

Cited by 35 publications

References 20 publications

Vector ecology and susceptibility in a malariaendemic focus in southern Islamic Republic of Iran

Vector ecology and susceptibility in a malariaendemic focus in southern Islamic Republic of Iran

The Field Practices of Lambdacyhalothrin and Deltamethrin Insecticides Against Adult Mosquitoes of Anopheles stephensi as the Main Vector of Malaria: Residual Effects

Evaluation of residual effects of deltamethrin wg250 on different surfaces against An.stephensi, in a malarious area, southern Iran

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