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Farhan M, Zhao C, Akhtar S, Ahmad I, Jilong P, Zhang S. Assessment of Nano-Formulated Conventional Insecticide-Treated Sugar Baits on Mosquito Control and the Effect on Non-Target Aphidophagous Coccinella septempunctata. INSECTS 2024; 15:70. [PMID: 38249076 PMCID: PMC10816155 DOI: 10.3390/insects15010070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/06/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024]
Abstract
Mosquitoes, as disease vectors causing global morbidity and mortality through diseases like malaria, dengue, and Zika, necessitate mosquito population control methods. This study investigated the efficacy of nano-formulated insecticide-based sugar baits in controlling Anopheles gambiae populations and assessed their potential non-target impact on Coccinella septempunctata. This laboratory-based study employed thiolated polymer-coated attractive toxic sugar bait (ATSB) nano-formulations, delivering pesticides via nano-carriers. Adult and larvae populations of insects were collected from rice and cotton fields subjected to bioassays with 0.5% and 1% concentrations of each nano-formulated and conventional insecticide within ATSB solution, alongside a control 100% attractive sugar bait (ASB). Mosquitoes interacted overnight with insecticide-treated baits, and mortality was assessed. Further observations up to 72 h were conducted for potential delayed toxic effects. Results highlighted nano-ATSB carbosulfan's effectiveness, particularly among organophosphates and pyrethroids. Among pyrethroids, nano-ATSB cypermethrin exhibited high efficacy, while Deltamethrin displayed lower mortality. Among organophosphates, nano-ATSB chlorpyrifos induced substantial mortality. The nano-formulations of insecticide were harmless against C. septempunctata compared to their conventional form. Nano-formulations demonstrated enhanced mortality rates and prolonged efficacy against mosquitoes, having a benign impact on non-target beetles. We expect these results to aid in developing effective plant protection products suitable for IPM practices.
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Affiliation(s)
- Muhammad Farhan
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China; (M.F.); (P.J.)
| | - Chenchen Zhao
- College of Plant Protection, Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Sohail Akhtar
- Department of Entomology, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Ishtiaq Ahmad
- Department of Horticultural Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Pan Jilong
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China; (M.F.); (P.J.)
| | - Shuai Zhang
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China; (M.F.); (P.J.)
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Shafiq M, Abubakar M, Riaz M, Shad SA. Development of alpha-cypermethrin resistance and its effect on biological parameters of yellow fever mosquito, Aedes aegypti (L.) (Diptera: Culicidae). Parasitol Res 2023; 123:14. [PMID: 38060021 DOI: 10.1007/s00436-023-08051-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 11/02/2023] [Indexed: 12/08/2023]
Abstract
Alpha-cypermethrin interacts with the sodium channel and causes nerve blockage in insects. It is used to manage Aedes aegypti (Linnaeus) (Diptera: Culicidae), a primary vector of dengue worldwide. It not only affects both target and non-target organisms, but overuse of this insecticide increases the chances of resistance development in insect pests. In this study, resistance development, biological parameters, and stability of alpha-cypermethrin resistance were studied in a laboratory-selected strain of Ae. aegypti. The alpha-cypermethrin selected strain (Alpha Sel) developed an 11.86-fold resistance level after 12 rounds of alpha-cypermethrin selection compared to the unselected strain (Unsel). In biological parameters, Alpha Sel and Cross1 (Unsel ♂ and Alpha Sel♀) had shorter larval durations compared to Unsel and Cross2 (Unsel ♀ and Alpha Sel ♂) populations. The pupal duration of Alpha Sel and both crosses was shorter than that in the Unsel strain. The relative fitness of Alpha Sel, Cross1, and Cross2 was significantly less than that of the Unsel strain. These results indicate that alpha-cypermethrin resistance comes with fitness costs. Moreover, the frequency of alpha-cypermethrin resistance decreased when the Alpha Sel population was reared without further selection pressure for four generations. So, resistance was unstable and reversed when insecticide pressure ceased. We concluded that the judicious and rotational use of different insecticides with different modes of action and the adoption of other IPM-recommended practices would suppress resistance development for more extended periods in Ae. aegypti.
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Affiliation(s)
- Maryam Shafiq
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
| | - Muhammad Abubakar
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
| | - Muhammad Riaz
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - Sarfraz Ali Shad
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
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Pai HH, Chang CY, Lin KC, Hsu EL. Rapid insecticide resistance bioassays for three major urban insects in Taiwan. Parasit Vectors 2023; 16:447. [PMID: 38042818 PMCID: PMC10693703 DOI: 10.1186/s13071-023-06055-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 11/13/2023] [Indexed: 12/04/2023] Open
Abstract
BACKGROUND Taiwan's warm and humid climate and dense population provide a suitable environment for the breeding of pests. The three major urban insects in Taiwan are house flies, cockroaches, and mosquitoes. In cases where a disease outbreak or high pest density necessitates chemical control, selecting the most effective insecticide is crucial. The resistance of pests to the selected environmental insecticide must be rapidly assessed to achieve effective chemical control and reduce environmental pollution. METHODS In this study, we evaluated the resistance of various pests, namely, house flies (Musca domestica L.), cockroaches (Blattella germanica L. and Periplaneta americana), and mosquitoes (Aedes aegypti and Ae. albopictus) against 10 commonly used insecticides. Rapid insecticide resistance bioassays were performed using discriminating doses or concentrations of the active ingredients of insecticides. RESULTS Five field strains of M. domestica (L.) are resistant to all 10 commonly used insecticides and exhibit cross- and multiple resistance to four types of pyrethroids and three types of organophosphates, propoxur, fipronil, and imidacloprid. None of the five field strains of P. americana are resistant to any of the tested insecticides, and only one strain of B. germanica (L.) is resistant to permethrin. One strain of Ae. albopictus is resistant to pirimiphos-methyl, whereas five strains of Ae. aegypti exhibit multiple resistance to pyrethroids, organophosphates, and other insecticides. CONCLUSIONS In the event of a disease outbreak or high pest density, rapid insecticide resistance bioassays may be performed using discriminating doses or concentrations to achieve precise and effective chemical control, reduce environmental pollution, and increase control efficacy.
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Affiliation(s)
- Hsiu-Hua Pai
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC).
| | - Chun-Yung Chang
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC)
| | - Kai-Chen Lin
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC)
| | - Err-Lieh Hsu
- Department of Entomology, National Taiwan University, Taipei, Taiwan (ROC)
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Yeo H, Tan HZ, Tang Q, Tan TRH, Puniamoorthy N, Rheindt FE. Dense residential areas promote gene flow in dengue vector mosquito Aedes albopictus. iScience 2023; 26:107577. [PMID: 37680477 PMCID: PMC10481301 DOI: 10.1016/j.isci.2023.107577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/13/2023] [Accepted: 08/04/2023] [Indexed: 09/09/2023] Open
Abstract
Aedes albopictus is a successful disease vector due to its ability to survive in a wide range of habitats. Despite its ubiquity and impact on public health, little is known about its differential gene flow capabilities across different city habitats. We obtained a comprehensive dataset of >27,000 genome-wide DNA markers across 105 wild-caught Ae. albopictus individuals from Singapore, a dengue-endemic tropical city with heterogeneous landscapes from densely populated urban areas to forests. Despite Singapore's challenging small-scale heterogeneity, our landscape-genomic approach indicated that dense urban areas are characterized by higher Aedes gene flow rates than managed parks and forests. We documented the incidence of Wolbachia infections of Ae. albopictus involving two strains (wAlbA and wAlbB). Our results dispel the misconception that substantial dispersal of Ae. albopictus is limited to urban greenery, with wide implications for vector management and critical insights into urban planning strategies to combat dengue transmission.
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Affiliation(s)
- Huiqing Yeo
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Hui Zhen Tan
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Qian Tang
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Tyrone Ren Hao Tan
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Nalini Puniamoorthy
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Frank E. Rheindt
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
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Asgarian TS, Vatandoost H, Hanafi-Bojd AA, Nikpoor F. Worldwide Status of Insecticide Resistance of Aedes aegypti and Ae. albopictus, Vectors of Arboviruses of Chikungunya, Dengue, Zika and Yellow Fever. J Arthropod Borne Dis 2023; 17:1-27. [PMID: 37609563 PMCID: PMC10440498 DOI: 10.18502/jad.v17i1.13198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 12/24/2022] [Indexed: 08/24/2023] Open
Abstract
Background Controlling of Aedes aegypti and Ae. albopictus, vectors of five important mosquito-borne diseases, is known as the most effective method to prevent the transmission of arboviruses to humans, but the emergence of insecticide resistance is threat for control and prevention of vector borne diseases. A better understanding of mosquito resistance to insecticides will help to develop more effective methods to control insecticide resistance in mosquito vectors. Methods Worldwide geographical distribution of insecticide resistance in Ae. aegypti and Ae. albopictus by the available papers and map of the data for carbamates, organochlorines, organophosphates, pyrethroids, microbial and insect growth regulator insecticides were reviewed. Article data published up to December 2022 were investigated by searching the following databases: "Google Scholar", "PubMed", "Scopus", "SID" and "Web of Knowledge". Results The results showed that the susceptibility and resistance status of Ae. aegypti and Ae. albopictus to insecticides in the world is very diverse. Conclusion Due to the importance of Ae. aegypti and Ae. albopictus in the transmission of mosquito-borne arboviruses, resistance management should be given more attention worldwide to prevent insecticide resistance in the arbovirus vector and replace the new approach for vector control.
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Affiliation(s)
- Tahereh Sadat Asgarian
- Department of Vector Biology and Control of Diseases, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Vatandoost
- Department of Vector Biology and Control of Diseases, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Department of Chemical Pollutants and Pesticides, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Ali Hanafi-Bojd
- Department of Vector Biology and Control of Diseases, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Department of Chemical Pollutants and Pesticides, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Nikpoor
- Department of Chemical Pollutants and Pesticides, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
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Fagbohun IK, Oyeniyi TA, Idowu ET, Nwanya O, Okonkwo F, Adesalu KO, Jimoh RT, Oladosu Y, Otubanjo OA, Adeogun AO. Detection and Co-occurrence of kdr (F1534C and S989P) Mutations in Multiple Insecticides Resistant Aedes aegypti (Diptera: Culicidae) in Nigeria. JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:1741-1748. [PMID: 35960164 DOI: 10.1093/jme/tjac114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Indexed: 06/15/2023]
Abstract
The outbreak of yellow fever virus transmitted by Aedes aegypti has been of major concern in Nigeria, this mosquito also transmits several other arboviruses globally. The control of many vectors of mosquito-borne diseases relies heavily on the use of insecticides. Therefore, constant monitoring of insecticide resistance status and associated mechanisms is crucial within the local mosquito population. Here, we determined the resistance profile of adult Ae. aegypti from Majidun and Oke Ota communities, Ikorodu Local Government Area of Lagos State, Nigeria to different classes of insecticides using WHO procedures. The resistant phenotypes of Ae. aegypti were screened for the presence of kdr mutations F1534C, S989P, and V1016G, which have been implicated in insecticide resistance in yellow fever vectors. A high level of resistance to DDT and pyrethroids was recorded in Ae. aegypti in this study, although possible resistance to deltamethrin, one of the pyrethroids was reported in one of the locations. Resistance to bendiocarb was recorded in the Majidun community while Ae. aegypti in both locations were susceptible to malathion. The presence of F1534C mutation associated with DDT and deltamethrin resistance in Ae. aegypti population, and the presence of S989P mutation were detected singly and in co-occurrence with F1534C for the first time in Africa, while V1016G mutation was not detected in this study. The role of these mutations in resistance phenotype expressed in Ae. aegypti in larger populations needs to be established.
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Affiliation(s)
- Ifeoluwa Kayode Fagbohun
- Molecular Entomology and Vector Research Laboratory, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
- Department of Zoology, University of Lagos, Yaba, Lagos State, Nigeria
| | - Tolulope Amos Oyeniyi
- Molecular Entomology and Vector Research Laboratory, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | | | - Oge Nwanya
- Department of Zoology, University of Lagos, Yaba, Lagos State, Nigeria
| | - Felix Okonkwo
- Department of Zoology, University of Lagos, Yaba, Lagos State, Nigeria
| | - Kemi O Adesalu
- Molecular Entomology and Vector Research Laboratory, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | - Romoke T Jimoh
- Molecular Entomology and Vector Research Laboratory, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | - Yusuff Oladosu
- Institute of Tropical Agriculture and Food Security, Universiti Putra, Serdang, Selangor Daruf Ehsan, Malaysia
| | | | - Adedapo O Adeogun
- Molecular Entomology and Vector Research Laboratory, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
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Silalahi CN, Tu WC, Chang NT, Singham GV, Ahmad I, Neoh KB. Insecticide Resistance Profiles and Synergism of Field Aedes aegypti from Indonesia. PLoS Negl Trop Dis 2022; 16:e0010501. [PMID: 35666774 PMCID: PMC9203003 DOI: 10.1371/journal.pntd.0010501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/16/2022] [Accepted: 05/16/2022] [Indexed: 12/05/2022] Open
Abstract
Information on the insecticide resistance profiles of Aedes aegypti in Indonesia is fragmentary because of the lack of wide-area insecticide resistance surveillance. We collected Ae. aegypti from 32 districts and regencies in 27 Indonesian provinces and used WHO bioassays to evaluate their resistance to deltamethrin, permethrin, bendiocarb, and pirimiphos-methyl. To determine the possible resistance mechanisms of Ae. aegypti, synergism tests were conducted using piperonyl butoxide (PBO) and S,S,S-tributylphosphorotrithioates (DEF). The Ae. aegypti from all locations exhibited various levels of resistance to pyrethroids. Their resistance ratio (RR50) to permethrin and deltamethrin ranged from 4.08× to 127× and from 4.37× to 72.20×, respectively. In contrast with the findings of other studies, most strains from the highly urbanized cities on the island of Java (i.e., Banten, Jakarta, Bandung, Semarang, Yogyakarta, and Surabaya) exhibited low to moderate resistance to pyrethroids. By contrast, the strains collected from the less populated Kalimantan region exhibited very high resistance to pyrethroids. The possible reasons are discussed herein. Low levels of resistance to bendiocarb (RR50, 1.24–6.46×) and pirimiphos-methyl (RR50, 1.01–2.70×) were observed in all tested strains, regardless of locality. PBO and DEF synergists significantly increased the susceptibility of Ae. aegypti to permethrin and deltamethrin and reduced their resistance ratio to less than 16×. The synergism tests suggested the major involvement of cytochrome P450 monooxygenases and esterases in conferring pyrethroid resistance. On the basis of our results, we proposed a 6-month rotation of insecticides (deltamethrin + synergists ➝ bendiocarb ➝ permethrin + synergists ➝ pirimiphos-methyl) and the use of an insecticide mixture containing pyrethroid and pyrimiphos-methyl to control Ae. aegypti populations and overcome the challenge of widespread Ae. aegypti resistance to pyrethroid in Indonesia. Insecticide resistance is a major impediment to the successful management of vector-transmitted diseases because it increases the vector’s chances of surviving under insecticide treatment. In Indonesia, the implementation of insecticide resistance management at the national level is particularly challenging due to the vast area and regional disparities in terms of population, health, and socioeconomic status. Previous studies on determining insecticide resistance of Aedes mosquito only focused on several cities in some provinces of Indonesia, making resistance monitoring results difficult to interpret and arguably reflect the generality in Indonesia. To complicate the matter, data released by the Ministry of Agriculture of Indonesia in 2022 showed that approximately 82% of insecticides registered to control Ae. aegypti in Indonesia are pyrethroid-based products. Principally, we found that the synergists PBO and DEF significantly reduce the resistance of field Ae. aegypti from Indonesia toward permethrin and deltamethrin. Bendiocarb and pirimiphos-methyl remain highly toxic to the field strains of Ae. aegypti. We suggest the feasible choice of insecticide group for Ae. aegypti vector management based on the currently registered insecticide inventory. The finding also underscores the urgent need to approve other non-pyrethroid-based insecticides as alternative tools for reducing the risk of resistance development during an outbreak.
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Affiliation(s)
| | - Wu-Chun Tu
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
| | - Niann-Tai Chang
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - G. Veera Singham
- Centre for Chemical Biology, Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
| | - Intan Ahmad
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung, West Java, Indonesia
- * E-mail: (IA); (KBN)
| | - Kok-Boon Neoh
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
- * E-mail: (IA); (KBN)
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Akhir MAM, Wajidi MFF, Lavoué S, Azzam G, Jaafar IS, Awang Besar NAU, Ishak IH. Knockdown resistance (kdr) gene of Aedes aegypti in Malaysia with the discovery of a novel regional specific point mutation A1007G. Parasit Vectors 2022; 15:122. [PMID: 35387654 PMCID: PMC8988349 DOI: 10.1186/s13071-022-05192-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 02/04/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Improved understanding of the molecular basis of insecticide resistance may yield new opportunities for control of relevant disease vectors. In this current study, we investigated the quantification responses for the phenotypic and genotypic resistance of Aedes aegypti populations from different states in Malaysia. METHODS We tested the insecticide susceptibility status of adult Ae. aegypti from populations of three states, Penang, Selangor and Kelantan (Peninsular Malaysia), against 0.25% permethrin and 0.25% pirimiphos-methyl using the World Health Organisation (WHO) adult bioassay method. Permethrin-resistant and -susceptible samples were then genotyped for domains II and III in the voltage-gated sodium channel (vgsc) gene using allele-specific polymerase chain reaction (AS-PCR) for the presence of any diagnostic single-nucleotide mutations. To validate AS-PCR results and to identify any possible additional point mutations, these two domains were sequenced. RESULTS The bioassays revealed that populations of Ae. aegypti from these three states were highly resistant towards 0.25% permethrin and 0.25% pirimiphos-methyl. Genotyping results showed that three knockdown (kdr) mutations (S989P, V1016G and F1534C) were associated with pyrethroid resistance within these populations. The presence of a novel mutation, the A1007G mutation, was also detected. CONCLUSIONS This study revealed the high resistance level of Malaysian populations of Ae. aegypti to currently used insecticides. The resistance could be due to the widespread presence of four kdr mutations in the field and this could potentially impact the vector control programmes in Malaysia and alternative solutions should be sought.
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Affiliation(s)
- Mas Azlin M Akhir
- Insecticide Resistance Research Group (IRRG), School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Mustafa F F Wajidi
- School of Distance Education, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.,Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Sébastien Lavoué
- Insecticide Resistance Research Group (IRRG), School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Ghows Azzam
- Insecticide Resistance Research Group (IRRG), School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Izhan Shahrin Jaafar
- Kota Bharu Public Health Laboratory, Kelantan State Health Department, 16010, Kota Bharu, Kelantan, Malaysia
| | - Noor Aslinda Ummi Awang Besar
- Vector-Borne Disease Control Programme, Penang State Health Department, Anson Road, 10400, George Town, Penang, Malaysia
| | - Intan H Ishak
- Insecticide Resistance Research Group (IRRG), School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia. .,Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.
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Zhou G, Li Y, Jeang B, Wang X, Cummings RF, Zhong D, Yan G. Emerging Mosquito Resistance to Piperonyl Butoxide-Synergized Pyrethroid Insecticide and Its Mechanism. JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:638-647. [PMID: 35050361 PMCID: PMC8924976 DOI: 10.1093/jme/tjab231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Indexed: 06/14/2023]
Abstract
Piperonyl butoxide (PBO)-synergized pyrethroid products are widely available for the control of pyrethroid-resistant mosquitoes. To date, no study has examined mosquito resistance after pre-exposure to PBO and subsequent enzymatic activity when exposed to PBO-synergized insecticides. We used Culex quinquefasciatus Say (Diptera: Culicidae), an important vector of arboviruses and lymphatic filariasis, as a model to examine the insecticide resistance mechanisms of mosquitoes to PBO-synergized pyrethroid using modified World Health Organization tube bioassays and biochemical analysis of metabolic enzyme expressions pre- and post-PBO exposure. Mosquito eggs and larvae were collected from three cities in Orange County in July 2020 and reared in insectary, and F0 adults were used in this study. A JHB susceptible strain was used as a control. Mosquito mortalities and metabolic enzyme expressions were examined in mosquitoes with/without pre-exposure to different PBO concentrations and exposure durations. Except for malathion, wild strain Cx quinquefasciatus mosquitoes were resistant to all insecticides tested, including PBO-synergized pyrethroids (mortality range 3.7 ± 4.7% to 66.7 ± 7.7%). Wild strain mosquitoes had elevated levels of carboxylesterase (COE, 3.8-fold) and monooxygenase (P450, 2.1-fold) but not glutathione S-transferase (GST) compared to susceptible mosquitoes. When wild strain mosquitoes were pre-exposed to 4% PBO, the 50% lethal concentration of deltamethrin was reduced from 0.22% to 0.10%, compared to 0.02% for a susceptible strain. The knockdown resistance gene mutation (L1014F) rate was 62% in wild strain mosquitoes. PBO pre-exposure suppressed P450 enzyme expression levels by 25~34% and GST by 11%, but had no impact on COE enzyme expression. Even with an optimal PBO concentration (7%) and exposure duration (3h), wild strain mosquitoes had significantly higher P450 enzyme expression levels after PBO exposure compared to the susceptible laboratory strain. These results further demonstrate other studies that PBO alone may not be enough to control highly pyrethroid-resistant mosquitoes due to multiple resistance mechanisms. Mosquito resistance to PBO-synergized insecticide should be closely monitored through a routine resistance management program for effective control of mosquitoes and the pathogens they transmit.
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Affiliation(s)
- Guofa Zhou
- Program in Public Health, University of California, Irvine, CA, USA
| | - Yiji Li
- Program in Public Health, University of California, Irvine, CA, USA
| | - Brook Jeang
- Program in Public Health, University of California, Irvine, CA, USA
| | - Xiaoming Wang
- Program in Public Health, University of California, Irvine, CA, USA
| | - Robert F Cummings
- Orange County Mosquito and Vector Control District, Garden Grove, CA, USA
| | - Daibin Zhong
- Program in Public Health, University of California, Irvine, CA, USA
| | - Guiyun Yan
- Program in Public Health, University of California, Irvine, CA, USA
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Vargas-Espinosa JH, Aguirre-Obando OA. Global phylogeography of the flood mosquito, Aedes vexans (Diptera: Culicidae), from mitochondrial DNA. ZOOLOGIA 2022. [DOI: 10.1590/s1984-4689.v39.e21029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Adhikari K, Khanikor B. Gradual reduction of susceptibility and enhanced detoxifying enzyme activities of laboratory-reared Aedes aegypti under exposure of temephos for 28 generations. Toxicol Rep 2021; 8:1883-1891. [PMID: 34900604 PMCID: PMC8639454 DOI: 10.1016/j.toxrep.2021.11.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/01/2021] [Accepted: 11/23/2021] [Indexed: 01/14/2023] Open
Abstract
Aedes aegypti mosquitoes were exposed to temephos for 28 generations. This exposure led to a 7.83-fold decrease in temephos toxicity. With increase in generational time, Ae. aegypti exhibited increased detoxification. Increased detoxification correlated with increase in detoxifying enzymes. Repeated exposure of Ae. aegypti to temephos could lead to pesticide resistance.
Temephos, an organophosphate insecticide, is widely accepted for the control of Aedes aegypti, vector of infectious diseases such as dengue, chikungunya, yellow fever, and zika. However, there are claims that repeated and indiscriminate use of temephos has resulted in resistance development in exposed mosquito populations. The present study attempts to evaluate the continuous performance of temephos on the Ae. aegypti population, in laboratory conditions, in terms of toxicity and the effect on marker enzymes associated with metabolic resistance. Results of the toxicity bioassay showed that after the initial exposure, toxicity increased till F4 generation by 1.65 fold, and continuous exposure resulted in a 7.83 fold reduction in toxicity at F28 generation. Percent mortality result showed a marked reduction in mortality with the passage of generations while using the same series of concentrations, viz. 2 ppm, which was 100 % lethal at the initial nine generations, could kill only 22.66 % at F28. Resistance to organophosphates is mainly governed by metabolic detoxifying enzyme families of esterases, glutathione-s-transferase, and cytochrome P450. Analysis of these metabolic detoxifying enzymes showed an inverse trend to toxicity (i.e. toxicity increased in early generations as enzyme activity dropped and then dropped as enzyme activity increased). At the initial exposure, enzyme activity decreased in 2–4 generations, however, repeated exposure led to a significant increase in all the metabolic detoxifying enzymes. From the toxicity level as well as marker enzyme bioassay results, it can be inferred that mosquitoes showed increased detoxification in generational time with an increase in enzymes associated with metabolic detoxification. In conclusion, repeated application of temephos led to resistance development in Ae. aegypti which may be associated with the increase in metabolic detoxifying enzyme activities.
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Key Words
- ANOVA, analysis of variance
- BSA, bovine serum albumin
- CDNB, 1-chloro-2,4-dinitrobenzene
- CPCSEA, committee for the purpose of control and supervision of experiments on animals
- DEET, NN-diethyl-meta-toluamide
- DEM, diethyl maleate
- DMSO, dimethyl sulfoxide
- Dengue vector
- GSH, reduced glutathione
- GST, glutathione-s-transferase
- IAEC, institutional animal ethical committee
- LC50, lethal concentration 50
- Larvicide
- MAPK, mitogen-activated protein kinases
- NADPH, nicotinamide adenine dinucleotide phosphate hydrogen
- OD, optical density
- OP, organophosphate
- Organophosphates
- PBO, piperonyl butoxide
- PPM, parts per million
- Pesticide resistance
- SE, standard error
- SPSS, statistical package for the social sciences
- TMBZ, 3, 3, 5, 5-tetramethyl benzidine
- TPP, triphenyl phosphate
- Temephos
- WHO, World Health Organization
- ºC, degree celsius
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Amala K, Karthi S, Ganesan R, Radhakrishnan N, Srinivasan K, Mostafa AEZMA, Al-Ghamdi AA, Alkahtani J, Elshikh MS, Senthil-Nathan S, Vasantha-Srinivasan P, Krutmuang P. Bioefficacy of Epaltes divaricata (L.) n-Hexane Extracts and Their Major Metabolites against the Lepidopteran Pests Spodoptera litura (fab.) and Dengue Mosquito Aedes aegypti (Linn.). Molecules 2021; 26:molecules26123695. [PMID: 34204264 PMCID: PMC8234362 DOI: 10.3390/molecules26123695] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/08/2021] [Accepted: 06/10/2021] [Indexed: 11/16/2022] Open
Abstract
The present research investigated the chemical characterization and insecticidal activity of n-Hexane extracts of Epaltes divaricata (NH-EDx) along with their chief derivatives n-Hexadecanoic acid (n-HDa) and n-Octadecanoic acid (n-ODa) against the dengue vector Aedes aegypti and lepidopteran pest Spodoptera litura. Chemical screening of NH-EDx through GC-MS analysis delivered nine major derivatives, and the maximum peak area percentage was observed in n-Hexadecanoic acid (14.63%) followed by n-Octadecadienoic acid (6.73%). The larvicidal activity of NH-EDx (1000 ppm), n-HDa (5 ppm), and n-ODa (5 ppm) against the A. aegypti and S. litura larvae showed significant mortality rate in a dose-dependent way across all the instars. The larvicidal activity was profound in the A. aegypti as compared to the S. litura across all the larval instars. The sublethal dosages of NH-EDx (500 ppm), n-HDa (2.5 ppm), and n-ODa (2.5 ppm) also showed alterations in the larval/pupal durations and adult longevity in both the insect pests. The enzyme activity revealed that the α- and β-carboxylesterase levels were decreased significantly in both the insect pests, whereas the levels of GST and CYP450 uplifted in a dose-dependent manner of NH-EDx, n-HDa, and n-ODa. Correspondingly, midgut tissues such as the epithelial layer (EL), gut lumen (GL), peritrophic matrix (Pm), and brush border membrane (BBM) were significantly altered in their morphology across both A. aegypti and S. litura against the NH-EDx and their bioactive metabolites. NH-EDx and their bioactive metabolites n-HDa and n-ODa showed significant larvicidal, growth retardant, enzyme inhibition, and midgut toxicity effects against two crucial agriculturally and medically challenging insect pest of ecological importance.
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Affiliation(s)
- Kesavan Amala
- Department of Biotechnology, St. Peter’s Institute of Higher Education and Research, Avadi-600 054 Chennai, Tamil Nadu, India;
| | - Sengodan Karthi
- Division of Bio-Pesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India;
| | - Raja Ganesan
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon 200 704, Korea;
| | - Narayanaswamy Radhakrishnan
- Department of Biochemistry, St. Peter’s Institute of Higher Education and Research, Avadi-600 054 Chennai, Tamil Nadu, India; (N.R.); (K.S.)
| | - Kumaraswamy Srinivasan
- Department of Biochemistry, St. Peter’s Institute of Higher Education and Research, Avadi-600 054 Chennai, Tamil Nadu, India; (N.R.); (K.S.)
| | - Abd El-Zaher M. A. Mostafa
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (A.E.-Z.M.A.M.); (A.A.A.-G.); (J.A.); (M.S.E.)
| | - Abdullah Ahmed Al-Ghamdi
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (A.E.-Z.M.A.M.); (A.A.A.-G.); (J.A.); (M.S.E.)
| | - Jawaher Alkahtani
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (A.E.-Z.M.A.M.); (A.A.A.-G.); (J.A.); (M.S.E.)
| | - Mohamed Soliman Elshikh
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (A.E.-Z.M.A.M.); (A.A.A.-G.); (J.A.); (M.S.E.)
| | - Sengottayan Senthil-Nathan
- Division of Bio-Pesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India;
- Correspondence: (S.S.-N.); (P.V.-S.); (P.K.)
| | - Prabhakaran Vasantha-Srinivasan
- Department of Biotechnology, St. Peter’s Institute of Higher Education and Research, Avadi-600 054 Chennai, Tamil Nadu, India;
- Correspondence: (S.S.-N.); (P.V.-S.); (P.K.)
| | - Patcharin Krutmuang
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai, University, Muang, Chiang Mai 50200, Thailand
- Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
- Correspondence: (S.S.-N.); (P.V.-S.); (P.K.)
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Gan SJ, Leong YQ, Bin Barhanuddin MFH, Wong ST, Wong SF, Mak JW, Ahmad RB. Dengue fever and insecticide resistance in Aedes mosquitoes in Southeast Asia: a review. Parasit Vectors 2021; 14:315. [PMID: 34112220 PMCID: PMC8194039 DOI: 10.1186/s13071-021-04785-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 05/11/2021] [Indexed: 12/26/2022] Open
Abstract
Dengue fever is the most important mosquito-borne viral disease in Southeast Asia. Insecticides remain the most effective vector control approach for Aedes mosquitoes. Four main classes of insecticides are widely used for mosquito control: organochlorines, organophosphates, pyrethroids and carbamates. Here, we review the distribution of dengue fever from 2000 to 2020 and its associated mortality in Southeast Asian countries, and we gather evidence on the trend of insecticide resistance and its distribution in these countries since 2000, summarising the mechanisms involved. The prevalence of resistance to these insecticides is increasing in Southeast Asia, and the mechanisms of resistance are reported to be associated with target site mutations, metabolic detoxification, reduced penetration of insecticides via the mosquito cuticle and behavioural changes of mosquitoes. Continuous monitoring of the status of resistance and searching for alternative control measures will be critical for minimising any unpredicted outbreaks and improving public health. This review also provides improved insights into the specific use of insecticides for effective control of mosquitoes in these dengue endemic countries. ![]()
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Affiliation(s)
- Soon Jian Gan
- International Medical University, 57000, Kuala Lumpur, Malaysia
| | - Yong Qi Leong
- International Medical University, 57000, Kuala Lumpur, Malaysia.,Monash University Malaysia, 47500, Subang Jaya, Selangor, Malaysia
| | | | - Siew Tung Wong
- International Medical University, 57000, Kuala Lumpur, Malaysia
| | - Shew Fung Wong
- International Medical University, 57000, Kuala Lumpur, Malaysia. .,Institute for Research, Development and Innovation (IRDI), International Medical University, 57000, Kuala Lumpur, Malaysia.
| | - Joon Wah Mak
- International Medical University, 57000, Kuala Lumpur, Malaysia.,Institute for Research, Development and Innovation (IRDI), International Medical University, 57000, Kuala Lumpur, Malaysia
| | - Rohani Binti Ahmad
- Institute for Medical Research, Jalan Pahang, 50588, Kuala Lumpur, Malaysia
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Insecticide resistance and underlying targets-site and metabolic mechanisms in Aedes aegypti and Aedes albopictus from Lahore, Pakistan. Sci Rep 2021; 11:4555. [PMID: 33633183 PMCID: PMC7907206 DOI: 10.1038/s41598-021-83465-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 01/18/2021] [Indexed: 01/31/2023] Open
Abstract
Insecticide resistant Aedes populations have recently been reported in Pakistan, imposing a threat to their control. We aimed to evaluate the susceptibility of Aedes aegypti and Aedes albopictus populations from Lahore to WHO-recommended insecticides and to investigate metabolic and target-site resistance mechanisms. For this purpose, we first carried out bioassays with the larvicides temephos and pyriproxyfen, and the adulticides malathion, permethrin, deltamethrin, alpha-cypermethrin, and etofenprox. We looked for Knockdown resistance mutations (kdr) by qPCR, High-Resolution Melt (HRM), and sequencing. In order to explore the role of detoxifying enzymes in resistance, we carried out synergist bioassay with both species and then checked the expression of CYP9M6, CYP9J10, CYP9J28, CYP6BB2, CCAe3a, and SAP2 genes in Ae. aegypti. Both species were susceptible to organophosphates and the insect growth regulator, however resistant to all pyrethroids. We are reporting the kdr haplotypes 1520Ile + 1534Cys and T1520 + 1534Cys in high frequencies in Ae. aegypti while Ae. albopictus only exhibited the alteration L882M. PBO increased the sensitivity to permethrin in Ae. aegypti, suggesting the participation of P450 genes in conferring resistance, and indeed, CYP928 was highly expressed. We presume that dengue vectors in Lahore city are resistant to pyrethroids, probably due to multiple mechanisms, such as kdr mutations and P450 overexpression.
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15
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Vasantha-Srinivasan P, Karthi S, Ganesan R, Senthil-Nathan S, Krutmuang P, Chellappandian M, Radhakrishnan N, Ponsankar A, Karthick K, Nelofer AR. The efficacy of methanolic extract of Swietenia mahagoni Jacq. (Meliaceae) and a commercial insecticide against laboratory and field strains of Aedes aegypti (Linn.) and their impact on its predator Toxorhnchites splendens. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Sarma R, Adhikari K, Mahanta S, Khanikor B. Insecticidal activities of Citrus aurantifolia essential oil against Aedes aegypti (Diptera: Culicidae). Toxicol Rep 2019; 6:1091-1096. [PMID: 31687359 PMCID: PMC6819703 DOI: 10.1016/j.toxrep.2019.10.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 08/15/2019] [Accepted: 10/08/2019] [Indexed: 11/29/2022] Open
Abstract
The peel and leaf essential oil of Citrus aurantifolia possess potential larvicidal and ovicidal activity against Aedes aegypti. The leaf and peel essential oil of Citrus aurantifolia was found to differ in their chemical compositions. Citral, the major compound of leaf essential oil of Citrus aurantifolia was more effective than the crude oil against Aedes aegypti.
Background In the recent time, global attention for the control of vectors has shifted from chemical insecticides to botanicals. In the present investigation, authors attempted to evaluate the efficacy of peel and leaf essential oil (EO) of Citrus aurantifolia against Aedes aegypti. Results The results revealed that both the oils possess more ovicidal activity (LC50 value of 5.26 ppm and 17.71 ppm for leaf and peel oil respectively at 72 h) than larvicidal activity. As larvicide, the essential oil from the peel of Citrus aurantifolia showed rapid effect with LC50 value of 128.81 ppm at 24 h which reduced to 106.77 ppm at 72 h while the leaf oil showed slow effect with LC50 value of 188.59 ppm, 107.37 ppm and 104.59 ppm at 24 h, 48 h and 72 h respectively. Again, the two essential oils did not show significant adulticidal activity. GC–MS analysis of both the oils recorded presence of different compounds. As a major constituent compound of the leaf EO of Citrus aurantifolia, citral was tested for their ovicidal, larvicidal and adulticidal activities against Aedes aegypti. The result showed highest ovicidal activities (LC50 value of 4.84 ppm at 72 h) of citral followed by larvicidal (LC50 value of 87.02 ppm at 24 h) and adulticidal (LC50 value of 103.88 ppm at 24 h) activities. Conclusion From this study, it can be concluded that the essential oil extracted from the leaf and peel of Citrus aurantifolia and one of its major constituent compound citral can be included in the mosquito control programme of Aedes aegypti.
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Affiliation(s)
- Riju Sarma
- Department of Zoology, Gauhati University, Guwahati, India
| | - Kamal Adhikari
- Department of Zoology, Gauhati University, Guwahati, India
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17
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Khan HAA, Akram W. Resistance Status to Deltamethrin, Permethrin, and Temephos Along With Preliminary Resistance Mechanism in Aedes aegypti (Diptera: Culicidae) From Punjab, Pakistan. JOURNAL OF MEDICAL ENTOMOLOGY 2019; 56:1304-1311. [PMID: 31028391 DOI: 10.1093/jme/tjz057] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Indexed: 06/09/2023]
Abstract
The use of insecticides such as deltamethrin, permethrin, and temephos has been a primary tool to manage Aedes aegypti (Linnaeus) in Punjab province, Pakistan; however, recent reports of control failure necessitate monitoring insecticide resistance. For this reason, we evaluated 12 field strains of Ae. aegypti from Punjab for resistance against deltamethrin, permethrin, and temephos along with underlying resistance mechanisms. For deltamethrin, high level of resistance was observed in Rawalpindi, Faisalabad, Sheikhupura, Lahore, Pattoki, and Kasur strains (RRLC50 > 10-fold); moderate level of resistance in Sargodha, Gujranwala, and Sialkot strains (RRLC50 = 5- to 10-fold), and low level of resistance in Okara, Multan, and Sahiwal strains (RRLC50 < 5-fold). In the case of permethrin, high level of resistance was found in all the field strains, except the Okara strain that exhibited moderate resistance. For temephos, five field strains, viz. Faisalabad, Rawalpindi, Kasur, Lahore, and Gujranwala, showed high level of resistance; five strains, viz. Sheikhupura, Sialkot, Pattoki, Sahiwal, and Okara, showed moderate resistance, and two strains from Multan and Sargodha showed low resistance to temephos. Synergism bioassays implementing piperonyl butoxide and S,S,S-tributylphosphorotrithioate exhibited a nonsignificant effect on synergizing toxicity of deltamethrin and permethrin in all field strains except the Lahore strain, suggesting the possible role of target-site resistance mechanism. However, both synergists had a significant effect on synergizing toxicity of temephos in all field strains, suggesting the possibility of metabolic-based mechanism of insecticide resistance. In conclusion, the study confirmed the presence of resistance to deltamethrin, permethrin, and temephos in the studied field strains of Ae. aegypti from Punjab, Pakistan.
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Affiliation(s)
| | - Waseem Akram
- Department of Entomology, University of Agriculture, Faisalabad, Pakistan
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18
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Leong CS, Vythilingam I, Liew JWK, Wong ML, Wan-Yusoff WS, Lau YL. Enzymatic and molecular characterization of insecticide resistance mechanisms in field populations of Aedes aegypti from Selangor, Malaysia. Parasit Vectors 2019; 12:236. [PMID: 31097010 PMCID: PMC6521414 DOI: 10.1186/s13071-019-3472-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 04/30/2019] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Dengue is a serious public health problem worldwide, including in Selangor, Malaysia. Being an important vector of dengue virus, Aedes aegypti are subjected to control measures which rely heavily on the usage of insecticides. Evidently, insecticide resistance in Ae. aegypti, which arise from several different point mutations within the voltage-gated sodium channel genes, has been documented in many countries. Thus, this robust study was conducted in all nine districts of Selangor to understand the mechanisms of resistance to various insecticides in Ae. aegypti. Mosquitoes were collected from dengue epidemic and non-dengue outbreak areas in Selangor. METHODS Using the Center for Disease Control and Prevention (CDC) bottle assays, the insecticide resistance status of nine different Ae. aegypti strains from Selangor was accessed. Synergism tests and biochemical assays were conducted to further understand the metabolic mechanisms of insecticide resistance. Polymerase chain reaction (PCR) amplification and sequencing of the IIP-IIS6 as well as IIIS4-IIIS6 regions of the sodium channel gene were performed to enable comparisons between susceptible and resistant mosquito strains. Additionally, genomic DNA was used for allele-specific PCR (AS-PCR) genotyping of the gene to detect the presence of F1534C, V1016G and S989P mutations. RESULTS Adult female Ae. aegypti from various locations were susceptible to malathion and propoxur. However, they exhibited different levels of resistance against dichlorodiphenyltrichloroethane (DDT) and pyrethroids. The results of synergism tests and biochemical assays indicated that the mixed functions of oxidases and glutathione S-transferases contributed to the DDT and pyrethroid resistance observed in the present study. Besides detecting three single kdr mutations, namely F1534C, V1016G and S989P, co-occurrence of homozygous V1016G/S989P (double allele) and F1534C/V1016G/S989P (triple allele) mutations were also found in Ae. aegypti. As per the results, the three kdr mutations had positive correlations with the expressions of resistance to DDT and pyrethroids. CONCLUSIONS In view of the above outcomes, it is important to seek new tools for vector management instead of merely relying on insecticides. If the latter must be used, regular monitoring of insecticide resistance should also be carried out at all dengue epidemic areas. Since the eggs of Ae. aegypti can be easily transferred from one location to another, it is probable that insecticide-resistant Ae. aegypti can be found at non-dengue outbreak sites as well.
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Affiliation(s)
- Cherng-Shii Leong
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, 50603 Malaysia
| | - Indra Vythilingam
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, 50603 Malaysia
| | - Jonathan Wee-Kent Liew
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, 50603 Malaysia
| | - Meng-Li Wong
- The Tropical Infectious Diseases Research and Education Centre (TIDREC), Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Wan Sulaiman Wan-Yusoff
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, 50603 Malaysia
| | - Yee-Ling Lau
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, 50603 Malaysia
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Gonzalez-Morales MA, Romero A. Effect of Synergists on Deltamethrin Resistance in the Common Bed Bug (Hemiptera: Cimicidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:786-791. [PMID: 30535372 DOI: 10.1093/jee/toy376] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Indexed: 06/09/2023]
Abstract
The common bed bug, Cimex lectularius L. (Hemiptera: Cimicidae), is an obligate hematophagous insect that has resurged worldwide since the early 2000s. Bed bug control is largely based on the widespread, intensive application of pyrethroid-based insecticide formulations, resulting in the emergence of insecticide-resistant bed bug populations. Insecticide resistance is frequently linked to metabolic detoxification enzymes such as cytochrome monooxygenase (P450s), esterases, glutathione S-tranferase, and carboxylesterase. Therefore, one way to overcome insecticide resistance could be the formulation of insecticides with synergists that counteract metabolic resistance. To test this hypothesis, we evaluated the impact of four synergists-piperonyl butoxide (PBO), diethyl maleate (DEM), S,S,S-tributyl phosphorotrithioate (DEF), and triphenyl phosphate (TPP)-on deltamethrin efficacy in two pyrethroid-resistant bed bug strains. A statistically significant difference in synergism ratios (SR) of a highly resistant field-derived strain (Jersey City, resistance ratio [RR] = 20,000) was noted when any of the four synergists (PBO SR = 20.5; DEM SR = 11.7; DEF SR = 102.3; and TPP SR = 9.7) were used with deltamethrin. In a less deltamethrin-resistant strain, Cincinnati (RR = 3,333), pretreatment with PBO and DEM significantly synergized deltamethrin (PBO SR = 158.8; DEM = 58.8), whereas application of DEF and TPP had no synergistic effect. The synergism data collected strongly suggest that detoxification enzymes play a significant role in the metabolic mechanisms that mediate deltamethrin resistance in bed bugs. The development and use of safe metabolic synergists that suppress detoxification enzymes offers an interesting avenue for the management of insecticide-resistant field populations.
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Affiliation(s)
- Maria A Gonzalez-Morales
- Department of Entomology, Plant Pathology and Weed Science, New Mexico State University, Las Cruces, NM
| | - Alvaro Romero
- Department of Entomology, Plant Pathology and Weed Science, New Mexico State University, Las Cruces, NM
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20
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Enhanced mortality in deltamethrin-resistant Aedes aegypti in Thailand using a piperonyl butoxide synergist. Acta Trop 2019; 189:76-83. [PMID: 30287252 DOI: 10.1016/j.actatropica.2018.09.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 09/28/2018] [Accepted: 09/28/2018] [Indexed: 11/20/2022]
Abstract
Aedes aegypti is the primary vector of dengue viruses in Thailand. Control of this mosquito continues to rely heavily on use of insecticides in various forms and applications. The synergistic effect of piperonyl butoxide (PBO), combined with deltamethrin against eight populations of Ae. aegypti collected from different regions in Thailand is presented. The standard WHO adult contact bioassays found all populations with low to moderate levels of resistance to deltamethrin alone (using a 0.05% discriminating concentration), with final mortalities ranging from 15.6 to 70%, while a laboratory strain was fully susceptible (100% mortality). Pre-exposure of female mosquitoes to 4% PBO for 1 h, followed immediately by exposure to deltamethrin for 1 h, significantly increased mortality in seven populations (64.8-98.1%) with the exception of mosquitoes derived from Lampang Province. The knockdown time (KDT) synergist ratios between deltamethrin only and PBO + deltamethrin ranged from 1.7 to 2.8 for KDT50 and 1.9 to 4.0 for KDT95. Between deltamethrin alone and mosquitoes exposed to PBO + deltamethrin, all resistant populations produced significant differences (P < 0.05) in final 24-h mortality, except marginally for Lampang (P = 0.053). The synergistic effects of PBO with deltamethrin-resistant Ae. aegypti suggest a combination of this synergist with deltamethrin or other pyrethroid compounds can significantly enhance the effectiveness of these insecticides against pyrethroid-resistant Ae. aegypti found commonly in Thailand.
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Amelia-Yap ZH, Chen CD, Sofian-Azirun M, Lau KW, Suana IW, Syahputra E, Razak A, Low VL. Efficacy of Mosquito Coils: Cross-resistance to Pyrethroids in Aedes aegypti (Diptera: Culicidae) From Indonesia. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:2854-2860. [PMID: 30265353 DOI: 10.1093/jee/toy296] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Indexed: 06/08/2023]
Abstract
Aedes aegypti (L.) (Diptera: Culicidae) is the primary vector of several arthropod-borne viral infectious diseases globally. Relentless vector control efforts are performed to curtail disease transmissions, insecticides remain as the first line of defense in Indonesia. With a dearth of publication on the efficacy of mosquito coil in Indonesia, this is the first report related to mosquito coil despite its common use in households. Ae. aegypti mosquitoes were sampled from nine regencies in Indonesia and tested using the glass-chamber method against three commercially available local pyrethroid-based mosquito coils containing d-allethrin, transfluthrin, and metofluthrin. The 50% knockdown time of female Ae. aegypti tested with d-allethrin, transfluthrin, and metofluthrin containing coils ranged from 0.65 to 14.32; 0.8 to 16.4; and 0.78 to 20.57 min, respectively. Mortality rates in accordance with WHO resistance indicators showed that strains from Denpasar, Mataram, Kuningan, Padang, Samarinda, and Sumba Timur were resistant (<80% mortality rate), whereas strains from Manggarai Barat, Dompu, and Pontianak were susceptible (>98% mortality rate) to the active ingredients assayed. Moreover, the knockdown rates between d-allethrin and transfluthrin, d-allethrin and metofluthrin, as well as transfluthrin and metofluthrin displayed significant associations, portraying the presence of cross-resistance within pyrethroid insecticides. The minimal insecticidal effect of mosquito coils against some Indonesian Ae. aegypti also pointed out the development of pyrethroid resistance, prompting a revamping of the vector control system.
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Affiliation(s)
- Zheng Hua Amelia-Yap
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, Kuala Lumpur, Malaysia
| | - Chee Dhang Chen
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Sofian-Azirun
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Koon Weng Lau
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - I Wayan Suana
- Faculty of Mathematics and Natural Science, University of Mataram, Jl. Majapahit No. 62, Mataram, Nusa Tenggara Barat, Indonesia
| | - Edy Syahputra
- Faculty of Agriculture, Tanjungpura University, Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
| | - Abdul Razak
- Faculty of Mathematics and Natural Science, Padang State University, Jl. Prof. Dr. Hamka, Kampus Air Tawar, Padang, Sumatera Barat, Indonesia
| | - Van Lun Low
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, Kuala Lumpur, Malaysia
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Amelia-Yap ZH, Chen CD, Sofian-Azirun M, Low VL. Pyrethroid resistance in the dengue vector Aedes aegypti in Southeast Asia: present situation and prospects for management. Parasit Vectors 2018; 11:332. [PMID: 29866193 PMCID: PMC5987412 DOI: 10.1186/s13071-018-2899-0] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 05/14/2018] [Indexed: 01/06/2023] Open
Abstract
Human arboviral diseases transmitted by Aedes aegypti such as dengue, Zika, chikungunya and yellow fever remain global public health threats to date. Of these diseases, dengue fever is particularly prevalent in Southeast Asia. Relentless vector control efforts are performed to curtail disease transmissions through which pyrethroid insecticides are broadly used as the first line of defense to control Ae. aegypti, especially in the course of disease outbreaks. Here, we compile the largest contemporary database for susceptibility profiles and underlying mechanisms involved in Ae. aegypti resistant to pyrethroids in Southeast Asia. The extensive use of pyrethroids inevitably elicit different levels of resistance to numerous populations despite the presence of geographical isolation. The most common mechanisms of pyrethroid resistance that have been identified in Ae. aegypti includes mutations in the voltage sensitive sodium channel gene (Vssc gene) and metabolic-mediated insecticide resistance. Aedes aegypti develops resistance to pyrethroids by acquisition of one or several amino acid substitution(s) in this Vssc gene. Enzymes involved in metabolic-mediated detoxification (i.e. monooxygenases, glutathione-S-transferases and esterases) have been reported to be related to pyrethroid resistance but many specific contributory enzymes are not completely studied. An inadequate amount of data from some countries indicates an urgent need for further study to fill the knowledge gaps. Perspectives and future research needs are also discussed.
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Affiliation(s)
- Zheng Hua Amelia-Yap
- Tropical Infectious Diseases Research & Education Centre (TIDREC), University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Chee Dhang Chen
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Mohd Sofian-Azirun
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Van Lun Low
- Tropical Infectious Diseases Research & Education Centre (TIDREC), University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Chellappandian M, Vasantha-Srinivasan P, Senthil-Nathan S, Karthi S, Thanigaivel A, Ponsankar A, Kalaivani K, Hunter WB. Botanical essential oils and uses as mosquitocides and repellents against dengue. ENVIRONMENT INTERNATIONAL 2018; 113:214-230. [PMID: 29453089 DOI: 10.1016/j.envint.2017.12.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/19/2017] [Accepted: 12/30/2017] [Indexed: 05/20/2023]
Abstract
Plants naturally produce bioactive compounds along with many secondary metabolites which serve as defensive chemical against herbivorers including insect pests. One group of these phytochemicals are the 'Essential Oils' (EO's), which possess an extensive range of biological activity especially insecticidal and insect repellents. This review provides a comprehensive viewpoint on potential modes of action of biosafety plant derived Essential Oils (EO's) along with their principal chemical derivatives against larvae and adult mosquito vectors of dengue virus. The development and use of Essential Oils (EO's) effectively applied in small rural communities provides an enormous potential for low cost effective management of insect vectors of human pathogens which cause disease.
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Affiliation(s)
- Muthiah Chellappandian
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Prabhakaran Vasantha-Srinivasan
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Sengottayan Senthil-Nathan
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India.
| | - Sengodan Karthi
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Annamalai Thanigaivel
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Athirstam Ponsankar
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Kandaswamy Kalaivani
- Post Graduate and Research Centre, Department of Zoology, Sri Parasakthi College for Women, Courtrallam, 627 802 Tirunelveli, Tamil Nadu, India
| | - Wayne B Hunter
- United States Department of Agriculture, Agricultural Research Service, U.S. Horticultural Research Laboratory, 2001 South Rock Road, Fort Pierce, FL 34945, USA
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Estep AS, Sanscrainte ND, Waits CM, Louton JE, Becnel JJ. Resistance Status and Resistance Mechanisms in a Strain of Aedes aegypti (Diptera: Culicidae) From Puerto Rico. JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:1643-1648. [PMID: 28981681 DOI: 10.1093/jme/tjx143] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Indexed: 06/07/2023]
Abstract
Puerto Rico (PR) has a long history of vector-borne disease and insecticide-resistant Aedes aegypti (L.). Defining contributing mechanisms behind phenotypic resistance is critical for effective vector control intervention. However, previous studies from PR have each focused on only one mechanism of pyrethroid resistance. This study examines the contribution of P450-mediated enzymatic detoxification and sodium channel target site changes to the overall resistance phenotype of Ae. aegypti collected from San Juan, PR, in 2012. Screening of a panel of toxicants found broad resistance relative to the lab susceptible Orlando (ORL1952) strain. We identified significant resistance to representative Type I, Type II, and nonester pyrethroids, a sodium channel blocker, and a sodium channel blocking inhibitor, all of which interact with the sodium channel. Testing of fipronil, a chloride channel agonist, also showed low but significant levels of resistance. In contrast, the PR and ORL1952 strains were equally susceptible to chlorfenapyr, which has been suggested as an alternative public health insecticide. Molecular characterization of the strain indicated that two common sodium channel mutations were fixed in the population. Topical bioassay with piperonyl butoxide (PBO) indicated cytochrome P450-mediated detoxification accounts for approximately half of the resistance profile. Transcript expression screening of cytochrome P450s and glutathione-S-transferases identified the presence of overexpressed transcripts. This study of Puerto Rican Ae. aegypti with significant contributions from both genetic changes and enzymatic detoxification highlights the necessity of monitoring for resistance but also defining the multiple resistance mechanisms to inform effective mosquito control.
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Affiliation(s)
- Alden S Estep
- Navy Entomology Center of Excellence, CMAVE Detachment, 1700 SW 23rd Drive, Gainesville, FL 32608
- Center for Medical, Agricultural, and Veterinary Entomology, USDA-ARS, 1700 SW 23rd Drive, Gainesville, FL 32608
| | - Neil D Sanscrainte
- Center for Medical, Agricultural, and Veterinary Entomology, USDA-ARS, 1700 SW 23rd Drive, Gainesville, FL 32608
| | - Christy M Waits
- Navy Entomology Center of Excellence, CMAVE Detachment, 1700 SW 23rd Drive, Gainesville, FL 32608
- Center for Medical, Agricultural, and Veterinary Entomology, USDA-ARS, 1700 SW 23rd Drive, Gainesville, FL 32608
| | - Jessica E Louton
- Center for Medical, Agricultural, and Veterinary Entomology, USDA-ARS, 1700 SW 23rd Drive, Gainesville, FL 32608
| | - James J Becnel
- Center for Medical, Agricultural, and Veterinary Entomology, USDA-ARS, 1700 SW 23rd Drive, Gainesville, FL 32608
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Rahim J, Ahmad AH, Ahmad H, Ishak IH, Rus AC, Maimusa HA. Adulticidal Susceptibility Evaluation of Aedes albopictus Using New Diagnostic Doses in Penang Island, Malaysia. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2017; 33:200-208. [PMID: 28854111 DOI: 10.2987/16-6607r.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Insecticide-based vector control approaches are facing challenges due to the development of resistance in vector mosquitoes. Therefore, a proper resistance surveillance program using baseline lethal concentrations is crucial for resistance management strategies. Currently, the World Health Organization's (WHO) diagnostic doses established for Aedes aegypti and Anopheles species are being used to study the resistance status of Aedes albopictus. In this study, we established the diagnostic doses for permethrin, deltamethrin, and malathion using a known susceptible reference strain. Five field-collected populations were screened against these doses, following the WHO protocol. This study established the diagnostic dose of malathion at 2.4%, permethrin at 0.95%, and deltamethrin at 0.28%, which differ from the WHO doses for Aedes aegypti and Anopheles spp. Among the insecticides tested on the 5 wild populations, only deltamethrin showed high effectiveness. Different susceptibility and resistance patterns were observed with permethrin, malathion, and dichloro-diphenyl-trichloroethane (DDT) at 4%. This study may assist the health authorities to improve future chemical-based vector control operations in dengue-endemic areas.
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26
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Lam S, Pham G, Nguyen-Viet H. Emerging health risks from agricultural intensification in Southeast Asia: a systematic review. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2017; 23:250-260. [PMID: 29560804 PMCID: PMC6060873 DOI: 10.1080/10773525.2018.1450923] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 03/07/2018] [Indexed: 11/04/2022]
Abstract
Background Agricultural intensification is having profound impacts on food security and rural livelihoods; however, concerns remain about the potential implications on public health. Objectives We aim to examine and synthesize the evidence for human health risks of agricultural intensification in Southeast Asia. Methods We conducted a systematic review of peer-reviewed articles published between January 2000 and December 2015 from two electronic databases (PubMed, CAB Direct). Results A total of 73 relevant studies were included and evaluated. More than half of the studies used epidemiological methods while others applied alternative methods to quantify or estimate risks. Studies mainly focused on occupational and consumer exposure to pesticides, without often specifying the actual health risk. Conclusion Overall, the current knowledge on health risks appears to be limited. More research on long-term health implications and a wider range of contaminants are needed if sustainable benefits are to be obtained from agricultural intensification.
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Affiliation(s)
- Steven Lam
- Hanoi University of Public Health, Center for Public Health and Ecosystem Research, Hanoi, Vietnam
- Department of Population Medicine, University of Guelph, Guelph, ON, Canada
| | - Giang Pham
- Hanoi University of Public Health, Center for Public Health and Ecosystem Research, Hanoi, Vietnam
- Vietnam Public Health Association, Hanoi, Vietnam
| | - Hung Nguyen-Viet
- Hanoi University of Public Health, Center for Public Health and Ecosystem Research, Hanoi, Vietnam
- International Livestock Research Institute, Hanoi, Vietnam
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Vasantha-Srinivasan P, Senthil-Nathan S, Ponsankar A, Thanigaivel A, Edwin ES, Selin-Rani S, Chellappandian M, Pradeepa V, Lija-Escaline J, Kalaivani K, Hunter WB, Duraipandiyan V, Al-Dhabi NA. Comparative analysis of mosquito (Diptera: Culicidae: Aedes aegypti Liston) responses to the insecticide Temephos and plant derived essential oil derived from Piper betle L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:439-446. [PMID: 28213320 DOI: 10.1016/j.ecoenv.2017.01.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 01/11/2017] [Accepted: 01/16/2017] [Indexed: 06/06/2023]
Abstract
Resistance to treatments with Temephos or plant derived oil, Pb-CVO, between a field collected Wild Strain (WS) and a susceptible Laboratory Strain (LS) of Ae. aegypti were measured. The Temephos (0.1mg/L) showed the greatest percentage of mosquito mortality compared to Pb-CVO (1.5mg/L) in LS Ae. aegypti. However, WS Ae. aegypti was not significantly affected by Temephos (0.1mg/L) treatment compare to the Pb-CVO (1.5mg/L). However, both strains (LS and WS) when treated with Pb-CVO (1.5mg/L) displayed steady larval mortality rate across all instars. The LC50 of Temephos was 0.027mg in LS, but increased in WS to 0.081mg/L. The LC50 of Pb-CVO treatment was observed at concentrations of 0.72 and 0.64mg/L for LS and WS strains respectively. The enzyme level of α- and β-carboxylesterase was reduced significantly in both mosquito strains treated with Pb-CVO. Whereas, there was a prominent deviation in the enzyme ratio observed between LS and WS treated with Temephos. The GST and CYP450 levels were upregulated in the LS, but decreased in WS, after treatment with Temephos. However, treatment with Pb-CVO caused both enzyme levels to increase significantly in both the strains. Visual observations of the midgut revealed cytotoxicity from sub-lethal concentrations of Temephos (0.04mg/L) and Pb-CVO (1.0mg/L) in both strains of Ae. aegypti compared to the control. The damage caused by Temephos was slightly less in WS compared to LS mosquito strains.
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Affiliation(s)
- Prabhakaran Vasantha-Srinivasan
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Sengottayan Senthil-Nathan
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India.
| | - Athirstam Ponsankar
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Annamalai Thanigaivel
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Edward-Sam Edwin
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Selvaraj Selin-Rani
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Muthiah Chellappandian
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Venkatraman Pradeepa
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Jalasteen Lija-Escaline
- óDivision of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India
| | - Kandaswamy Kalaivani
- óPost Graduate and Research Centre, Department of Zoology, Sri Parasakthi College for Women, Courtrallam, 627 802 Tirunelveli, Tamil Nadu, India
| | - Wayne B Hunter
- óUnited States Department of Agriculture, Agricultural Research Service, US Horticultural Research Laboratory, 2001 South Rock Road, Fort Pierce, FL 34945, USA
| | - Veeramuthu Duraipandiyan
- óDepartment of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Naif Abdullah Al-Dhabi
- óDepartment of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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Lysaght T, Lee TL, Watson S, Lederman Z, Bailey M, Tambyah PA. Zika in Singapore: insights from One Health and social medicine. Singapore Med J 2016; 57:528-529. [PMID: 27640519 DOI: 10.11622/smedj.2016161] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Tamra Lysaght
- Centre for Biomedical Ethics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Tsung-Ling Lee
- Centre for Biomedical Ethics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sangeetha Watson
- Centre for Biomedical Ethics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zohar Lederman
- Centre for Biomedical Ethics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Michele Bailey
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Paul Anantharajah Tambyah
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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29
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Vythilingam I, Sam JIC, Chan YF, Khaw LT, Sulaiman WYW. New Paradigms for Virus Detection, Surveillance and Control of Zika Virus Vectors in the Settings of Southeast Asia. Front Microbiol 2016; 7:1452. [PMID: 27679623 PMCID: PMC5020090 DOI: 10.3389/fmicb.2016.01452] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 08/30/2016] [Indexed: 01/15/2023] Open
Abstract
Zika virus (ZIKV) has now become a global public health concern. The vectors for ZIKV are Aedes aegypti and A. albopictus. Both these mosquitoes are predominant in Southeast Asia and are also responsible for the spread of other arboviral diseases like dengue virus and chikungunya virus. The incidence of dengue has been increasing over the years and this is of concern to public health workers. Simple laboratory tools for the detection of ZIKV is also lacking. In the absence of drugs and vaccine for these arboviral diseases, vector control is the main option for surveillance and control. Aedes larval surveys have been the hallmark of dengue control along with larviciding and fogging when cases are reported. However, we need new paradigms and options for control of these vectors. The current situation in Southeast Asia clearly proves that effective strategies for vector control need to be proactive and not reactive. This will be the way forward to control epidemics of these diseases inclusive of ZIKV until a vaccine becomes available.
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Affiliation(s)
- Indra Vythilingam
- Department of Parasitology, Faculty of Medicine, University of Malaya Kuala Lumpur, Malaysia
| | - Jamal I-C Sam
- Department of Microbiology, Faculty of Medicine, University of Malaya Kuala Lumpur, Malaysia
| | - Yoke F Chan
- Department of Microbiology, Faculty of Medicine, University of Malaya Kuala Lumpur, Malaysia
| | - Loke T Khaw
- Department of Parasitology, Faculty of Medicine, University of Malaya Kuala Lumpur, Malaysia
| | - Wan Y Wan Sulaiman
- Department of Parasitology, Faculty of Medicine, University of Malaya Kuala Lumpur, Malaysia
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30
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Involvement of Three Esterase Genes from Panonychus citri (McGregor) in Fenpropathrin Resistance. Int J Mol Sci 2016; 17:ijms17081361. [PMID: 27548163 PMCID: PMC5000756 DOI: 10.3390/ijms17081361] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/06/2016] [Accepted: 08/16/2016] [Indexed: 11/16/2022] Open
Abstract
The citrus red mite, Panonychus citri (McGregor), is a major citrus pest with a worldwide distribution and an extensive record of pesticide resistance. However, the underlying molecular mechanism associated with fenpropathrin resistance in this species have not yet been reported. In this study, synergist triphenyl phosphate (TPP) dramatically increased the toxicity of fenpropathrin, suggesting involvement of carboxylesterases (CarEs) in the metabolic detoxification of this insecticide. The subsequent spatiotemporal expression pattern analysis of PcE1, PcE7 and PcE9 showed that three CarEs genes were all over-expressed after insecticide exposure and higher transcripts levels were observed in different field resistant strains of P. citri. Heterologous expression combined with 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetra-zolium bromide (MTT) cytotoxicity assay in Spodoptera frugiperda (Sf9) cells revealed that PcE1-, PcE7- or PcE9-expressing cells showed significantly higher cytoprotective capability than parental Sf9 cells against fenpropathrin, demonstrating that PcEs probably detoxify fenpropathrin. Moreover, gene silencing through the method of leaf-mediated dsRNA feeding followed by insecticide bioassay increased the mortalities of fenpropathrin-treated mites by 31% (PcE1), 27% (PcE7) and 22% (PcE9), respectively, after individual PcE gene dsRNA treatment. In conclusion, this study provides evidence that PcE1, PcE7 and PcE9 are functional genes mediated in fenpropathrin resistance in P. citri and enrich molecular understanding of CarEs during the resistance development of the mite.
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32
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Insecticide Resistance and Management Strategies in Urban Ecosystems. INSECTS 2016; 7:insects7010002. [PMID: 26751480 PMCID: PMC4808782 DOI: 10.3390/insects7010002] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 12/24/2015] [Accepted: 12/28/2015] [Indexed: 01/02/2023]
Abstract
The increased urbanization of a growing global population makes imperative the development of sustainable integrated pest management (IPM) strategies for urban pest control. This emphasizes pests that are closely associated with the health and wellbeing of humans and domesticated animals. Concurrently there are regulatory requirements enforced to minimize inadvertent exposures to insecticides in the urban environment. Development of insecticide resistance management (IRM) strategies in urban ecosystems involves understanding the status and mechanisms of insecticide resistance and reducing insecticide selection pressure by combining multiple chemical and non-chemical approaches. In this review, we will focus on the commonly used insecticides and molecular and physiological mechanisms underlying insecticide resistance in six major urban insect pests: house fly, German cockroach, mosquitoes, red flour beetle, bed bugs and head louse. We will also discuss several strategies that may prove promising for future urban IPM programs.
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Lv Y, Wang W, Hong S, Lei Z, Fang F, Guo Q, Hu S, Tian M, Liu B, Zhang D, Sun Y, Ma L, Shen B, Zhou D, Zhu C. Comparative transcriptome analyses of deltamethrin-susceptible and -resistant Culex pipiens pallens by RNA-seq. Mol Genet Genomics 2015; 291:309-21. [PMID: 26377942 DOI: 10.1007/s00438-015-1109-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 08/21/2015] [Indexed: 11/26/2022]
Abstract
The widespread and improper use of pyrethroid insecticides, such as deltamethrin, has resulted in the evolution of resistance in many mosquito species, including Culex pipiens pallens. With the development of high-throughput sequencing, it is possible to massively screen pyrethroid resistance-associated gene. In this study, we used Illumina-Solexa transcriptome sequencing to identify genes that are expressed differently in deltamethrin-susceptible and -resistant strains of Culex pipiens pallens as a critical knowledge base for further studies. A total of 4,961,197,620 base pairs and 55,124,418 reads were sequenced, mapped to the Culex quinquefasciatus genome and assembled into 17,679 known genes. We recorded 1826 significantly differentially expressed genes (DEGs). Among them, 1078 genes were up-regulated and 748 genes were down-regulated in the deltamethrin-resistant strain compared to -susceptible strain. These DEGs contained cytochrome P450 s, cuticle proteins, UDP-glucuronosyltransferases, lipases, serine proteases, heat shock proteins, esterases and others. Among the 1826 DEGs, we found that the transcriptional levels of CYP6AA9 in the laboratory populations was elevated as the levels of deltamethrin resistance increased. Moreover, the expression levels of the CYP6AA9 were significantly higher in the resistant strains than the susceptible strains in three different field populations. We further confirmed the association between the CYP6AA9 gene and deltamethrin resistance in mosquitoes by RNA interfering (RNAi). Altogether, we explored massive potential pyrethroid resistance-associated genes and demonstrated that CYP6AA9 participated in the pyrethroid resistance in mosquitoes.
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Affiliation(s)
- Yuan Lv
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
- Department of Nuclear Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Weijie Wang
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Shanchao Hong
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Zhentao Lei
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Fujin Fang
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Qin Guo
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Shengli Hu
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Mengmeng Tian
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Bingqian Liu
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Donghui Zhang
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Yan Sun
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Lei Ma
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Bo Shen
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China
| | - Dan Zhou
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China.
| | - Changliang Zhu
- Department of Pathogen Biology, Nanjing Medical University, 210029, Nanjing, Jiangsu, China.
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Ayorinde A, Oboh B, Oduola A, Otubanjo O. The Insecticide Susceptibility Status of Aedes aegypti (Diptera: Culicidae) in Farm and Nonfarm Sites of Lagos State, Nigeria. JOURNAL OF INSECT SCIENCE (ONLINE) 2015; 15:75. [PMID: 26106087 PMCID: PMC4535572 DOI: 10.1093/jisesa/iev045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 04/29/2015] [Indexed: 06/04/2023]
Abstract
Nigeria is one of the malaria-endemic countries. In Lagos State, Nigeria, various malaria vector control programs including the use of chemical insecticides are currently being implemented. This study was designed to provide information on the susceptibility status of some nontargeted vectors such as Aedes aegypti. Adult Ae. aegypti mosquitoes from two farm sites and a nonfarm site were exposed to World Health Organization test papers impregnated with Deltamethrin (0.05%), Permethrin (0.75%), and DDT (4%) insecticides. The Knockdown time (KdT50 and KdT95) and percentage mortality after 24 h post exposure were determined. In all the exposed mosquito populations to permethrin, mortality rate > 98% (susceptibility) was recorded, whereas mortality rates < 95.8% (resistance) and > 98% (susceptibility) to deltamethrin were observed in the nonfarm site and farm sites mosquito populations, respectively. All the mosquito populations were resistant to DDT in 2 yr. The KdT50 of the populations to DDT increased (60.2-69.6) in one of the farm sites and the nonfarm site (68.9-199.96), while a decrease (243-63.4) in another farm site in 2 yr. Significant difference (P < 0.05) in KdT50 was recorded between the farm and nonfarm sites Ae. aegypti mosquitoes in the second year after exposure to deltamethrin and DDT. An increase in KdT95 after exposure to deltamethrin in the first year was recorded. Higher KdT values and lower mortality rates in Ae. aegypti populations in the nonfarm sites are indications there are existing factors selecting for insecticide resistance outside agricultural use of insecticides.
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Affiliation(s)
- A Ayorinde
- Biological Sciences Department, Redeemer's University, Mowe, Ogun State, Nigeria Department of Cell Biology and Genetics, University of Lagos, Akoka, Lagos, Nigeria
| | - B Oboh
- Department of Cell Biology and Genetics, University of Lagos, Akoka, Lagos, Nigeria
| | - A Oduola
- Biological Sciences Department, Redeemer's University, Mowe, Ogun State, NigeriaDepartment of Cell Biology and Genetics, University of Lagos, Akoka, Lagos, NigeriaDepartment of Zoology, University of Ilorin, Kwara State, Ilorin, NigeriaDepartment of Zoology, University of Lagos, Akoka, Lagos, Nigeria
| | - O Otubanjo
- Department of Zoology, University of Lagos, Akoka, Lagos, Nigeria
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35
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Yadav K, Rabha B, Dhiman S, Veer V. Multi-insecticide susceptibility evaluation of dengue vectors Stegomyia albopicta and St. aegypti in Assam, India. Parasit Vectors 2015; 8:143. [PMID: 25886449 PMCID: PMC4359396 DOI: 10.1186/s13071-015-0754-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 02/18/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dengue is rapidly expanding mosquito-borne viral infection globally facing operational challenges due to insecticide resistance in dengue vectors. We have studied the susceptibility status of potential dengue vectors St. albopicta and St. aegypti to the commonly used insecticides. METHODS Stegomyia larval bioassays were carried out to determine LC10, LC50 and LC99 values and resistance ratios (RR50 and RR99) for temephos. Adult susceptibility bioassay to 4% DDT, 0.05% deltamethrin, 5% malathion was assessed following standard procedure to determine the corrected mortality. Knock-down times (KDT50 and KDT99) were estimated and the knock-down resistance ratios (KRR50 and KRR99) were calculated. RESULTS St. albopicta wild population (WP) of Sotia was resistant to temephos as the LC99 value was 0.12 mg/l and found to be 2.3 fold high than the reference population (RP). St. aegypti WP of Borgong, Kusumtola and Serajuli displayed a RR99 of 2.5, 5.4 and 4.5 respectively suggesting high level of resistance to temephos. Results suggested that both St. albopicta and St. aegypti WP were fully resistant to DDT (mortality < 90%) in all the study locations. Both the species were completely susceptible to deltamethrin and malathion (corrected mortality > 98%), except for St. albopicta at Sotia which displayed low level of resistance to malathion (corrected mortality =95.4%). The estimated KDT values for both the species indicated high level of knock-down resistance to DDT and susceptibility to deltamethrin. CONCLUSION WP of both the dengue vectors showed varied response to temephos, while resistant to DDT and completely susceptible to deltamethrin. Both the species were susceptible to malathion at majority of the testing sites. Current results strongly advocate that DDT is no longer effective against dengue vectors, while thorough monitoring of malathion susceptibility in geographical area at dengue risk is inexorable to ascertain whether or not the resistance to malathion is focal. Information generated herein may be useful in better planning and implementing in dengue control strategy using insecticides.
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Affiliation(s)
- Kavita Yadav
- Defence Research Laboratory, Tezpur, Assam, 784 001, India.
| | - Bipul Rabha
- Defence Research Laboratory, Tezpur, Assam, 784 001, India.
| | - Sunil Dhiman
- Defence Research Laboratory, Tezpur, Assam, 784 001, India.
| | - Vijay Veer
- Defence Research Laboratory, Tezpur, Assam, 784 001, India.
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