Arsalan Amirkafi; Seyed Massoud Madjdzadeh; Mohammad Amin Gorouhi; Alireza Sanei-Dehkordi; Ismaeil Alizadeh; Abbas Aghaei Afshar
Abstract
Background: Malaria is the most important mosquito-borne disease in Iran in recent decades. This disease is endemic in the south to the southeastern Iran. Knowledge about larval habitats, species diversity, and distribution pattern of malaria vectors will help authorities in the appropriate management ...
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Background: Malaria is the most important mosquito-borne disease in Iran in recent decades. This disease is endemic in the south to the southeastern Iran. Knowledge about larval habitats, species diversity, and distribution pattern of malaria vectors will help authorities in the appropriate management of this disease. Qaleh Ganj county is one of the main endemic areas for malaria in the south of Iran. Little information is available about the fauna of mosquitoes and their characteristics in this area.Methods: This study aims to assess the fauna, larval habitats, species diversity, and distribution pattern of Anophelinae mosquitoes using the Geographic Information System (GIS) in Qaleh Ganj County, the southeast of Iran. The potential aquatic habitats for Anopheles larvae were selected based on the variety of topography and history of the malaria epidemic. The mosquito larvae were collected using dipping method from April to December 2018. Finally, the diversity, richness, and evenness indices were calculated.Results: A total of 1042 larvae were found. The dominant species was Anopheles culicifacies s.l. Giles, 1901. The Shannon diversity index ranged from 0.76–1.54 between different collection sites, while the other indices showed the highest and lowest diversity, evenness, and richness of species in each area.Conclusion: Due to the fact that some of the species in this region are species complexes, molecular studies are needed to find better information about the genetic diversity of these species which can be helpful for the malaria elimination program in Iran.
Kourosh Azizi; Mohammad Djaefar Moemenbellah-Fard; Mousa Khosravani-Shiri; Mohammad Reza Fakoorziba; Aboozar Soltani
Volume 2, Issue 1 , January 2014, , Pages 30-35
Abstract
Background: Human malaria remains a major malady in Eastern Iran. Vector control interventions such as indoor residual spraying are used to fight with the disease. This study was undertaken to determine the lethal and residual effects of three different pyrethroid insecticides on adult mosquitoes of ...
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Background: Human malaria remains a major malady in Eastern Iran. Vector control interventions such as indoor residual spraying are used to fight with the disease. This study was undertaken to determine the lethal and residual effects of three different pyrethroid insecticides on adult mosquitoes of Anopheles stephensi on different surfaces in Iran, as part of a national program to monitor insecticide resistance in endemic areas. Methods: Two main endemic foci were selected as collection sites. Wild adult females of An. stephensi (mysoriensis strain) from the first focus were subjected to standard susceptibility tests, using lambdacyhalothrin, deltamethrin and cyfluthrin insecticides within holding tubes according to the method proposed by WHO. In Kazerun, the residual effects of these compounds were examined by conical bioassay tests of An. stephensi (type strain) on plaster and cement walls. Data were analyzed using Mann-Whitney test to determine the differences in susceptibility and residual effects of An. stephensi mosquitoes to these insecticides. Results: The susceptibility of females of An. stephensi to three concentrations of lambdacyhalothrin, deltamethrin and cyfluthrin insecticides culminated in full scale mortality at the highest diagnostic dose. The maximal residual time of these three insecticides on plaster and cement walls was estimated to be about three months. There was no significant difference in the mortalities of An. stephensi on different sprayed surfaces (P=0.653). Conclusion: All field-collected An. stephensi populations exhibit gross susceptibility to all diagnostic doses of the three evaluated insecticides. In endemic areas, lambdacyhalothrin reveals a slightly longer residual activity than the other two insecticides.
Hamzeh Alipour; Mohammad Reza Abaie; Hossein Ladonni; Ali Akbar Kadivar
Volume 1, Issue 2 , October 2013, , Pages 94-97
Abstract
Background: Malaria is the most important vector-borne disease in many tropical countries all over the world. Because of the widespread use of pyrethroid insecticide treated mosquito nets in the world, the effects of excito-repellency (ER) phenomenon of pyrethroids against main malaria vector, Anopheles ...
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Background: Malaria is the most important vector-borne disease in many tropical countries all over the world. Because of the widespread use of pyrethroid insecticide treated mosquito nets in the world, the effects of excito-repellency (ER) phenomenon of pyrethroids against main malaria vector, Anopheles stephensi were studied.Methods: The ER phenomenon of three concentrations of two synthetic pyrethroids (permethrin and deltamethrin) as well as etofenprox was evaluated against Anopheles stephensi under laboratory conditions. Female 5-7 day unfed mosquitoes were exposed to animal bait in holder and the animal’s back and head were covered with impregnated bed net in -ER test chamber.Results: Deltamethrin was more effective compared to other insecticides in killing the mosquitoes. The mean of entry to exit trap showed significant differences in all concentrations of insecticides (P<0.05).Conclusion: This study showed that ER phenomenon of insecticides should be noticed in vector control programs. The ranked data indicated the relative potency of both pyrethroids and etofenprox. Deltamethrin repels the female mosquitoes more than other insecticides tested.