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Herath JMMK, De Silva WAPP, Weeraratne TC, Karunaratne SHPP. Efficacy of the insect growth regulator novaluron in the control of dengue vector mosquitoes Aedes aegypti and Ae. albopictus. Sci Rep 2024; 14:1988. [PMID: 38263389 PMCID: PMC10805727 DOI: 10.1038/s41598-024-52384-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: 11/23/2023] [Accepted: 01/18/2024] [Indexed: 01/25/2024] Open
Abstract
Insect Growth Regulator (IGR) novaluron is an alternative to synthetic neuro-inhibitory insecticides. Present study was designed to assess appropriate dosages of novaluron for dengue vector control. Larvae of Aedes aegypti and Ae. albopictus were exposed to a concentration series of novaluron (Rimon EC10) for two fixed exposure periods of 7-days and 14-days to determined LC50 and LC99 values. Inhibition of adult emergence (IE50 and IE99) was determined by a 14-day exposure. Semi-field experiments were conducted by exposing cohorts of Ae. aegypti larvae to IE99, 2 × IE99 and 10 × IE99 novaluron concentrations in water storage buckets (10 L) and plastic barrels (200 L). For the 7-day exposure, LC50 values were 0.047-0.049 ppm and LC99 were 0.144-0.151 ppm. For 14-day exposure, these values were 0.002-0.005 ppm and 0.006-0.01 ppm respectively. For both species, IE99 was 0.001 ppb under semi-field conditions, and was effective for nearly 2 months. Novaluron concentration 0.01 ppb was effective up to 3 months, with an IE of 89-95%. Authorities should critically review a reduction of the presently recommended field dosage of 200 ppm novaluron by × 100 or more. This would provide the same efficacy but mitigate environmental pollution, development of vector resistance, and financial losses.
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Affiliation(s)
- J M Manel K Herath
- Entomological Surveillance Unit, Office of Regional Director of Health Services, Kurunegala, Sri Lanka
- Postgraduate Institute of Science, University of Peradeniya, Peradeniya, Sri Lanka
| | | | - Thilini C Weeraratne
- Department of Zoology, Faculty of Science, University of Peradeniya, Peradeniya, Sri Lanka
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Elia-Amira NMR, Chen CD, Low VL, Lau KW, Haziqah-Rashid A, Amelia-Yap ZH, Lee HL, Sofian-Azirun M. Statewide Efficacy Assessment of Insect Growth Regulators Against Aedes albopictus (Diptera: Culicidae) in Sabah, Malaysia: An Alternative Control Strategy? JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:301-307. [PMID: 34459477 DOI: 10.1093/jme/tjab146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Indexed: 06/13/2023]
Abstract
The efficacy of three groups of insect growth regulators, namely juvenile hormone mimics (methoprene and pyriproxyfen), chitin synthesis inhibitors (diflubenzuron and novaluron), and molting disruptor (cyromazine) was evaluated for the first time, against Aedes albopictus Skuse (Diptera: Culicidae) larvae from 14 districts in Sabah, Malaysia. The results showed that all field populations of Ae. albopictus were susceptible towards methoprene, pyriproxyfen, diflubenzuron, novaluron, and cyromazine, with resistance ratio values ranging from 0.50-0.90, 0.60-1.00, 0.67-1.17, 0.71-1.29, and 0.74-1.07, respectively. Overall, the efficacy assessment of insect growth regulators in this study showed promising outcomes and they could be further explored as an alternative to conventional insecticides.
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Affiliation(s)
- N M R Elia-Amira
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - C D Chen
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
- Rimba Ilmu Botanical Garden, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - V L Low
- Higher Institution Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - K W Lau
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - A Haziqah-Rashid
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Z H Amelia-Yap
- Higher Institution Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - H L Lee
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588, Kuala Lumpur, Malaysia
| | - M Sofian-Azirun
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
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Morgan J, Salcedo-Sora JE, Triana-Chavez O, Strode C. Expansive and Diverse Phenotypic Landscape of Field Aedes aegypti (Diptera: Culicidae) Larvae with Differential Susceptibility to Temephos: Beyond Metabolic Detoxification. JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:192-212. [PMID: 34718656 PMCID: PMC8755997 DOI: 10.1093/jme/tjab179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Indexed: 05/08/2023]
Abstract
Arboviruses including dengue, Zika, and chikungunya are amongst the most significant public health concerns worldwide. Arbovirus control relies on the use of insecticides to control the vector mosquito Aedes aegypti (Linnaeus), the success of which is threatened by widespread insecticide resistance. The work presented here profiled the gene expression of Ae. aegypti larvae from field populations of Ae. aegypti with differential susceptibility to temephos originating from two Colombian urban locations, Bello and Cúcuta, previously reported to have distinctive disease incidence, socioeconomics, and climate. We demonstrated that an exclusive field-to-lab (Ae. aegypti strain New Orleans) comparison generates an over estimation of differential gene expression (DGE) and that the inclusion of a geographically relevant field control yields a more discrete, and likely, more specific set of genes. The composition of the obtained DGE profiles is varied, with commonly reported resistance associated genes including detoxifying enzymes having only a small representation. We identify cuticle biosynthesis, ion exchange homeostasis, an extensive number of long noncoding RNAs, and chromatin modelling among the differentially expressed genes in field resistant Ae. aegypti larvae. It was also shown that temephos resistant larvae undertake further gene expression responses when temporarily exposed to temephos. The results from the sampling triangulation approach here contribute a discrete DGE profiling with reduced noise that permitted the observation of a greater gene diversity, increasing the number of potential targets for the control of insecticide resistant mosquitoes and widening our knowledge base on the complex phenotypic network of the Ae. aegypti response to insecticides.
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Affiliation(s)
- Jasmine Morgan
- Department of Biology, Edge Hill University, Ormskirk, UK
| | - J Enrique Salcedo-Sora
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Omar Triana-Chavez
- Instituto de Biología, Facultad de Ciencias Exactas y Naturales (FCEN), University of Antioquia, Medellín, Colombia
| | - Clare Strode
- Department of Biology, Edge Hill University, Ormskirk, UK
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Bobadilla Alvarez MC, Palomino Cadenas EJ. CONTROL DE Aedes aegypti (DIPTERA: CULICIDAE) MEDIANTE ACTINOBACTERIAS FORMADORAS DE BIOPELÍCULAS. ACTA BIOLÓGICA COLOMBIANA 2021. [DOI: 10.15446/abc.v26n3.86966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
El phylum Actinobacteria incluye miembros productores de compuestos bioinsecticidas. No obstante, la sobreexplotacion de metabolitos derivados de Streptomyces ha conllevado a explorar nuevas moléculas provenientes de bacterias no estreptomicetos para contrarrestar la resistencia a insecticidas químicos en Aedes aegypti. Concordantes con el uso de bioagentes ecológicos, esta investigación caracterizó actinobacterias formadoras de biopelículas con el fin de evaluar su dinámica de crecimiento, actividad larvicida y efectos subletales. La identificación, crecimiento de biopelículas y bioactividades se realizaron por cultivos, análisis de imágenes por fotomicrografía y bioensayos. Los resultados mostraron que las biopelículas pertenecen a Pseudonocardiaceae (PsA1TA) y Corynebacteriaceae (CoA2CA) característicamente dependientes del revestimiento cuticular. PsA1TA coloniza estructuras membranosas de tórax y abdomen con microcolonias aleatoriamente distribuidas que desarrollan a extensas biopelículas mono y biestratificadas, al cubrir cuatro veces la amplitud toracoabdominal (envergadura infectiva entre 1010 µm a 1036 µm). En contraste, CoA2CA envuelve radialmente estructuras esclerotizadas cefálica y anal al triplicar la amplitud de tales órganos (1820 a 2030 µm y 1650 a 1860 µm, respectivamente). Las biopelículas ejercieron mortalidad diferenciada a todos los estadios larvales, no obstante, PsA1TA resultó más mortal y virulento en el segundo estadio larval (58 %-96 horas, TL50: 3,4 días), mientras que CoA2CA lo fue en el cuarto estadio larval (85 %-96 horas, TL50: 2,5 días). CoA2CA indujo emergencia incompleta de adultos farados y despliegue de tarsos curvos en emergentes, además de revestir con robustas biopelículas cadáveres larvarios. Las biopelículas actinobacterianas revelaron ejercer función larvicida y respuestas subletales en A. aegypti.
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Mang'era CM, Khamis FM, Awuoche EO, Hassanali A, Ombura FLO, Mireji PO. Transcriptomic response of Anopheles gambiae sensu stricto mosquito larvae to Curry tree (Murraya koenigii) phytochemicals. Parasit Vectors 2021; 14:1. [PMID: 33388087 PMCID: PMC7777392 DOI: 10.1186/s13071-020-04505-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/30/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Insect growth regulators (IGRs) can control insect vector populations by disrupting growth and development in juvenile stages of the vectors. We previously identified and described the curry tree (Murraya koenigii (L.) Spreng) phytochemical leaf extract composition (neplanocin A, 3-(1-naphthyl)-L-alanine, lumiflavine, terezine C, agelaspongin and murrayazolinol), which disrupted growth and development in Anopheles gambiae sensu stricto mosquito larvae by inducing morphogenetic abnormalities, reducing locomotion and delaying pupation in the mosquito. Here, we attempted to establish the transcriptional process in the larvae that underpins these phenotypes in the mosquito. METHODS We first exposed third-fourth instar larvae of the mosquito to the leaf extract and consequently the inherent phytochemicals (and corresponding non-exposed controls) in two independent biological replicates. We collected the larvae for our experiments sampled 24 h before peak pupation, which was 7 and 18 days post-exposure for controls and exposed larvae, respectively. The differences in duration to peak pupation were due to extract-induced growth delay in the larvae. The two study groups (exposed vs control) were consequently not age-matched. We then sequentially (i) isolated RNA (whole larvae) from each replicate treatment, (ii) sequenced the RNA on Illumina HiSeq platform, (iii) performed differential bioinformatics analyses between libraries (exposed vs control) and (iv) independently validated the transcriptome expression profiles through RT-qPCR. RESULTS Our analyses revealed significant induction of transcripts predominantly associated with hard cuticular proteins, juvenile hormone esterases, immunity and detoxification in the larvae samples exposed to the extract relative to the non-exposed control samples. Our analysis also revealed alteration of pathways functionally associated with putrescine metabolism and structural constituents of the cuticle in the extract-exposed larvae relative to the non-exposed control, putatively linked to the exoskeleton and immune response in the larvae. The extract-exposed larvae also appeared to have suppressed pathways functionally associated with molting, cell division and growth in the larvae. However, given the age mismatch between the extract-exposed and non-exposed larvae, we can attribute the modulation of innate immune, detoxification, cuticular and associated transcripts and pathways we observed to effects of age differences among the larvae samples (exposed vs control) and to exposures of the larvae to the extract. CONCLUSIONS The exposure treatment appears to disrupt cuticular development, immune response and oxidative stress pathways in Anopheles gambiae s.s larvae. These pathways can potentially be targeted in development of more efficacious curry tree phytochemical-based IGRs against An. gambiae s.s mosquito larvae.
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Affiliation(s)
- Clarence M Mang'era
- Department of Biochemistry and Molecular Biology, Egerton University, Njoro Campus, PO Box 536-20115, Egerton, Kenya. .,Department of Biochemistry, Microbiology and Biotechnology, School of Pure and Applied Sciences, Kenyatta University, Ruiru Campus, PO Box 43844-00100, Nairobi, Kenya.
| | - Fathiya M Khamis
- International Centre of Insect Physiology and Ecology (ICIPE), Duduville Campus, Kasarani, PO Box 30772-00100, Nairobi, Kenya
| | - Erick O Awuoche
- Department of Biological Sciences, Meru University of Science and Technology, PO Box 972-60200, Meru, Kenya
| | - Ahmed Hassanali
- Department of Chemistry, School of Pure and Applied Sciences, Kenyatta University, Ruiru Campus, PO Box 43844-00100, Nairobi, Kenya
| | - Fidelis Levi Odhiambo Ombura
- International Centre of Insect Physiology and Ecology (ICIPE), Duduville Campus, Kasarani, PO Box 30772-00100, Nairobi, Kenya
| | - Paul O Mireji
- Biotechnology Research Institute-Kenya Agricultural and Livestock Research Organization, PO Box 362-00902, Kikuyu, Kenya.
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Yasir M, Mankin RW, ul Hasan M, Sagheer M. Residual Efficacy of Novaluron Applied on Concrete, Metal, and Wood for the Control of Stored Product Coleopteran Pests. INSECTS 2020; 12:insects12010007. [PMID: 33375562 PMCID: PMC7824361 DOI: 10.3390/insects12010007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 11/23/2022]
Abstract
Simple Summary Insect pests of stored commodities cause harm not only to bulk grains but also to many value-added food products in mills, processing plants, and other facilities where these products are stored. In this study, the residual efficacy of an Insect Growth Regulator (IGR), novaluron, was evaluated under laboratory conditions against larvae of three stored product insects, Oryzaephilus surinamensis (L.), Triboliumcastaneum (Herbst), and Trogoderma granarium Everts, on concrete, metal, and wood surfaces to which IGRs are typically applied for pest control in such facilities. Statistically significant reductions in emergence percentages of adults compared to a distilled water control occurred for up to 12 weeks when novaluron was sprayed on concrete, metal, and wood at rates between 0.053 and 0.209 mg/m2, the highest of which induces 100% mortality at 0 weeks after treatment. Residual efficacy decreased with increasing time after treatment due to degradation and sorption of novaluron into the surfaces. Novaluron residues were most persistent on metal and least persistent on wood surfaces. Knowledge of novaluron residual efficacy on storage facility surfaces can be helpful guidance for timing of postharvest insect pest management treatments as the costs of commonly used pesticides increase along with insect resistance to such pesticides. Abstract The residual efficacy of novaluron on concrete, metal and wood was evaluated against last-instar larvae of Oryzaephilus surinamensis (L.), Triboliumcastaneum (Herbst), and Trogoderma granarium Everts. The larvae and food provided for survival were exposed to surfaces pretreated at rates of 0.053, to 0.209 mg/m2 and bioassays were conducted from 0- to 16-weeks post-treatment. Percentage emergence of adults was recorded after 30 days (d). On all surfaces at week 0, no O. surinamensis or T.castaneum adults emerged, and ≤3.3% emergence of T. granarium was found at 0.209 mg/m2. Novaluron significantly reduced the percentage emergence of adults of the three species compared to a distilled water control for the first 12 weeks on all the tested surfaces as the residual efficacy declined at a low rate during initial weeks and then at a high rate in the final weeks of the 16-week study. Reductions to emergence were most persistent on metal surfaces, with mean percentages of adult emergence of ≤18.3 in week 12, followed by concrete (≤32.5) and wood (≤45.0) for all species at novaluron application rates of 0.209 mg/m2. For >4-weeks protection, higher application rates would be needed to avoid buildup of pest populations and reductions in profitability. Such results can be helpful for the management of O. surinamensis, T.castaneum, and T. granarium as the costs of commonly used insecticides against postharvest insect pests and the resistance of these insects to the pesticides gradually increase in mills, warehouses, and food storage facilities.
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Affiliation(s)
- Muhammad Yasir
- Department of Entomology, University of Agriculture, Faisalabad 38000, Pakistan; (M.Y.); (M.u.H.); (M.S.)
| | - Richard W. Mankin
- Agricultural Research Service Center for Medical, Agricultural and Veterinary Entomology (CMAVE), United States Department of Agriculture, Gainesville, FL 32608, USA
- Correspondence: ; Tel.: +1-352-374-5774
| | - Mansoor ul Hasan
- Department of Entomology, University of Agriculture, Faisalabad 38000, Pakistan; (M.Y.); (M.u.H.); (M.S.)
| | - Muhammad Sagheer
- Department of Entomology, University of Agriculture, Faisalabad 38000, Pakistan; (M.Y.); (M.u.H.); (M.S.)
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Adedeji EO, Ogunlana OO, Fatumo S, Beder T, Ajamma Y, Koenig R, Adebiyi E. Anopheles metabolic proteins in malaria transmission, prevention and control: a review. Parasit Vectors 2020; 13:465. [PMID: 32912275 PMCID: PMC7488410 DOI: 10.1186/s13071-020-04342-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 09/01/2020] [Indexed: 12/21/2022] Open
Abstract
The increasing resistance to currently available insecticides in the malaria vector, Anopheles mosquitoes, hampers their use as an effective vector control strategy for the prevention of malaria transmission. Therefore, there is need for new insecticides and/or alternative vector control strategies, the development of which relies on the identification of possible targets in Anopheles. Some known and promising targets for the prevention or control of malaria transmission exist among Anopheles metabolic proteins. This review aims to elucidate the current and potential contribution of Anopheles metabolic proteins to malaria transmission and control. Highlighted are the roles of metabolic proteins as insecticide targets, in blood digestion and immune response as well as their contribution to insecticide resistance and Plasmodium parasite development. Furthermore, strategies by which these metabolic proteins can be utilized for vector control are described. Inhibitors of Anopheles metabolic proteins that are designed based on target specificity can yield insecticides with no significant toxicity to non-target species. These metabolic modulators combined with each other or with synergists, sterilants, and transmission-blocking agents in a single product, can yield potent malaria intervention strategies. These combinations can provide multiple means of controlling the vector. Also, they can help to slow down the development of insecticide resistance. Moreover, some metabolic proteins can be modulated for mosquito population replacement or suppression strategies, which will significantly help to curb malaria transmission.
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Affiliation(s)
- Eunice Oluwatobiloba Adedeji
- Covenant University Bioinformatics Research (CUBRe), Covenant University, Ota, Ogun State Nigeria
- Department of Biochemistry, Covenant University, Ota, Ogun State Nigeria
| | - Olubanke Olujoke Ogunlana
- Covenant University Bioinformatics Research (CUBRe), Covenant University, Ota, Ogun State Nigeria
- Department of Biochemistry, Covenant University, Ota, Ogun State Nigeria
| | - Segun Fatumo
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, Keppel St, Bloomsbury, London, UK
| | - Thomas Beder
- Integrated Research and Treatment Center, Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
| | - Yvonne Ajamma
- Covenant University Bioinformatics Research (CUBRe), Covenant University, Ota, Ogun State Nigeria
| | - Rainer Koenig
- Integrated Research and Treatment Center, Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
| | - Ezekiel Adebiyi
- Covenant University Bioinformatics Research (CUBRe), Covenant University, Ota, Ogun State Nigeria
- Computer and Information Sciences, Covenant University, Ota, Ogun State Nigeria
- Division of Applied Bioinformatics, German Cancer Research Center (DKFZ), G200, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
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Gunathilaka N, Ranathunga T, Hettiarachchi D, Udayanga L, Abeyewickreme W. Field-based evaluation of novaluron EC10 insect growth regulator, a chitin synthesis inhibitor against dengue vector breeding in leaf axils of pineapple plantations in Gampaha District, Sri Lanka. Parasit Vectors 2020; 13:228. [PMID: 32375877 PMCID: PMC7203902 DOI: 10.1186/s13071-020-04109-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 04/27/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Insect growth regulators (IGRs) are considered a novel group of insecticides to control mosquitoes. Novaluron is an IGR with benzoylphenyl urea insecticide, which inhibits chitin synthesis in insects and can reduce insect population density; it is also known to have a high margin of safety for mammals. METHODS The effective minimum concentration of novaluron formulation EC10 was tested. Six pineapple plantations [control (n = 3) and test (n = 3)] were selected from Meerigama Medical Officer of Health area in Gampaha District, Sri Lanka. Fifteen plots (10 × 10 m) were demarcated in each site with a 200 m distance apart. Leaf axils of 450 pineapple plants (30 plants × 15 plots) were screened for immature stages of Aedes mosquitoes weekly for 12 weeks. The required concentration (20 ppm) of novaluron was sprayed onto the selected pineapple plants (n = 1350) individually in 3 selected test sites for 5-10 s. The reduction in the vector population was interpreted as the percentage of reduction in immature stages of Aedes mosquitoes. RESULTS The 100% mortality of the Ae. aegypti larvae within 24 h was observed at 20 ppm (0.05 ml of novaluron 100 g/l in 250 ml of water) as the minimum dose. Variation in the number of Aedes larvae present in the control and intervention sites was found to be significantly different throughout the entire observational period (χ2 = 128.29, df = 11, P < 0.001). The total elimination of Aedes larvae continued for up to 2 weeks and a 50% reduction was observed until the 8th week. CONCLUSIONS The present study emphasizes that novaluron (10% EC) can be used as an effective larvicide at the treatment dose of 20 ppm. The residual effect of the IGR lasted for 12 weeks with a functional efficacy of 8 weeks. The 100% reduction of larval breeding was observed up to the 2nd week after application and the percentage reduction of immature stages remained > 50% until the 8th week. The lowest reduction (34.2%) was observed at 12 weeks after the initial treatment. Therefore, re-treatment may be recommended based on the reduction in the efficacy of the IGR.
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Affiliation(s)
- Nayana Gunathilaka
- Department of Parasitology, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka.
| | - Tharaka Ranathunga
- Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka
| | | | - Lahiru Udayanga
- Department of Bio-systems Engineering, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Sri Lanka
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Timoumi R, Amara I, Ayed Y, Ben Salem I, Abid-Essefi S. Triflumuron induces genotoxicity in both mice bone marrow cells and human Colon cancer cell line. Toxicol Mech Methods 2020; 30:438-449. [PMID: 32312157 DOI: 10.1080/15376516.2020.1758981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Triflumuron (TFM) is an insect growth regulator (IGR), an insecticide commonly used over the world. It is known for its several toxic manifestations, such as reprotoxicity, immunotoxicity and hematotoxicity, which could affect public health. However, studies that reveal its toxic effects on mammalians are limited. To reach this purpose, our study aimed to elucidate the eventual genotoxic effects of TFM in mice bone marrow cells and in HCT 116 cells after a short term exposition. TFM was administered intraperitoneally to Balb/C male mice at doses of 250, 350 and 500 mg/kg bw for 24 h. Genotoxicity was monitored in bone marrow cells using the comet test, the micronucleus test and the chromosome aberration assay. Our results showed that TFM induced DNA damages in a dose-dependent manner. This genotoxicity was confirmed also in vitro on human intestinal cells HCT 116 using the comet test. It was then asked whether this genotoxicity induced by TFM could be due to an oxidative stress. Thus, we found that TFM significantly decreased HCT 116 cell viability. In addition, it induced the generation of reactive oxygen species (ROS) followed by lipid peroxidation as revealed by the increase in the malondialdehyde (MDA) levels. Similarly, the activation of the antioxidant enzymes (catalase and superoxide dismutase) was also observed. Our results indicated that, in our experimental conditions, TFM had a genotoxic effect on bone morrow cells and in HCT 116 cells. Moreover, we demonstrated that this genotoxicity passes through an oxidative stress.
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Affiliation(s)
- Rim Timoumi
- Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds (LRSBC), University of Monastir, Monastir, Tunisia.,Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| | - Ines Amara
- Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds (LRSBC), University of Monastir, Monastir, Tunisia.,Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| | - Yossra Ayed
- Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds (LRSBC), University of Monastir, Monastir, Tunisia
| | - Intidhar Ben Salem
- Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds (LRSBC), University of Monastir, Monastir, Tunisia
| | - Salwa Abid-Essefi
- Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds (LRSBC), University of Monastir, Monastir, Tunisia
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Timoumi R, Amara I, Ben Salem I, Abid-Essefi S. Triflumuron induces cytotoxic effects on hepatic and renal human cell lines. J Biochem Mol Toxicol 2020; 34:e22504. [PMID: 32227688 DOI: 10.1002/jbt.22504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 02/26/2020] [Accepted: 03/16/2020] [Indexed: 11/10/2022]
Abstract
Insect growth regulator insecticides are a new class of pesticides, commonly used around the world to control insect damages. Among those compounds, we focused our interest on triflumuron (TFM), which is less toxic than other conventional insecticides. However, not much is known about its toxic effects on mammalian systems. Therefore, our study aimed toward evaluating the cytotoxic and genotoxic effects of TFM using two different cell lines, the human renal embryonic cells (HEK 293) and hepatocytes (Hep G2). We showed, according to the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, that TFM reduced significantly the cell viability and increased the reactive oxygen species generation, malondialdehyde levels, and mitochondrial membrane potential in both cell lines. The antioxidant system was disturbed as assessed by the increased activities in both catalase and superoxide dismutase. We demonstrated also, that TFM is an inductor of DNA damages quantified by the comet assay. Moreover, we showed an overexpression of proapoptotic Bax and a decrease in antiapoptotic Bcl-2 expression. As a conclusion, we demonstrate that the liver presents the major target organ to TFM, in which the cytotoxicity and the genotoxic effects were significantly higher in hepatic cells than in renal cells and by consequence its uses must be controlled.
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Affiliation(s)
- Rim Timoumi
- Laboratory for Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia.,Higher Institute of Biotechnology of Monastir, Monastir, Tunisia
| | - Ines Amara
- Laboratory for Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia.,Higher Institute of Biotechnology of Monastir, Monastir, Tunisia
| | - Intidhar Ben Salem
- Laboratory for Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia.,Faculty of Medicine of Sousse, University of Sousse, Sousse, Tunisia
| | - Salwa Abid-Essefi
- Laboratory for Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia
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11
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Hussain A, AlJabr AM, Al-Ayedh H. Development-Disrupting Chitin Synthesis Inhibitor, Novaluron, Reprogramming the Chitin Degradation Mechanism of Red Palm Weevils. Molecules 2019; 24:molecules24234304. [PMID: 31779078 PMCID: PMC6930496 DOI: 10.3390/molecules24234304] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 01/13/2023] Open
Abstract
Disruption in chitin regulation by using chitin synthesis inhibitor (novaluron) was investigated to gain insights into the biological activity of chitinase in red palm weevils, an invasive pest of date palms in the Middle East. Impact of novaluron against ninth instar red palm weevil larvae was examined by dose-mortality response bioassays, nutritional indices, and expression patterns of chitinase genes characterized in this study. Laboratory bioassays revealed dose-dependent mortality response of ninth-instar red palm weevil larvae with LD50 of 14.77 ppm of novaluron. Dietary growth analysis performed using different doses of novaluron (30, 25, 20, 15, 10, and 5 ppm) exhibited very high reduction in their indexes such as Efficacy of Conversion of Digested Food (82.38%) and Efficacy of Conversion of Ingested Food (74.27%), compared with control treatment. Transcriptomic analysis of red palm weevil larvae characterized numerous genes involved in chitin degradation including chitinase, chitinase-3-like protein 2, chitinase domain-containing protein 1, Endochitinase-like, chitinase 3, and chitin binding peritrophin-a domain. However, quantitative expression patterns of these genes in response to novaluron-fed larvae revealed tissue-specific time-dependent expression patterns. We recorded overexpression of all genes from mid-gut tissues. Growth retarding, chitin remodeling and larvicidal potential suggest novaluron as a promising alternate for Rhynchophorus ferrugineus management.
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Affiliation(s)
- Abid Hussain
- Laboratory of Bio-Control and Molecular Biology, Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia;
- Research and Consulting Institute, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia
- Ministry of Environment, Water and Agriculture, Riyadh 11442, Saudi Arabia;
| | - Ahmed Mohammed AlJabr
- Laboratory of Bio-Control and Molecular Biology, Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia;
- Correspondence: ; Tel.: +009-6650-691-4442
| | - Hassan Al-Ayedh
- Ministry of Environment, Water and Agriculture, Riyadh 11442, Saudi Arabia;
- National Agriculture technology center, Life science & Environment Research Institute, King Abdulaziz City for Science & Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
- RPW Consultant, United Nations, Food and Agriculture Organization (FAO), Riyadh 11442, Saudi Arabia
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12
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de Araújo AP, Paiva MHS, Cabral AM, Cavalcanti AEHD, Pessoa LFF, Diniz DFA, Helvecio E, da Silva EVG, da Silva NM, Anastácio DB, Pontes C, Nunes V, de Souza MDFM, Magalhães FJR, de Melo Santos MAV, Ayres CFJ. Screening Aedes aegypti (Diptera: Culicidae) Populations From Pernambuco, Brazil for Resistance to Temephos, Diflubenzuron, and Cypermethrin and Characterization of Potential Resistance Mechanisms. JOURNAL OF INSECT SCIENCE (ONLINE) 2019; 19:16. [PMID: 31175834 PMCID: PMC6556078 DOI: 10.1093/jisesa/iez054] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Indexed: 05/15/2023]
Abstract
Resistance to chemical insecticides detected in Aedes aegypti (L.) mosquitoes has been a problem for the National Dengue Control Program (PNCD) over the last years. In order to provide deeper knowledge of resistance to xenobiotics, our study evaluated the susceptibility profile of temephos, diflubenzuron, and cypermethrin insecticides in natural mosquito populations from the Pernambuco State, associating these results with the local historical use of such compounds. Furthermore, mechanisms that may be associated with this particular type of resistance were characterized. Bioassays with multiple temephos and diflubenzuron concentrations were performed to detect and quantify resistance. For cypermethrin, diagnostic dose assays were performed. Biochemical tests were carried out to quantify the activity of detoxification enzymes. In addition, a screening of mutations present in the voltage-gated sodium channel gene (NaV) was performed in samples previously submitted to bioassays with cypermethrin. The populations under study were resistant to temephos and showed a positive correlation between insecticide consumption and the resistance ratio (RR) to the compound. For diflubenzuron, the biological activity ratio (BAR) ranged from 1.3 to 4.7 times, when compared to the susceptible strain. All populations showed resistance to cypermethrin. Altered enzymatic profiles of alpha, p-nitrophenyl acetate (PNPA) esterases and glutathione-S-transferases were recorded in most of these samples. Molecular analysis demonstrated that Arcoverde was the only population that presented the mutated form 1016Ile/Ile. These findings show that the situation is critical vis-à-vis the effectiveness of mosquito control using chemical insecticides, since resistance to temephos and cypermethrin is widespread in Ae. aegypti from Pernambuco.
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Affiliation(s)
- Ana Paula de Araújo
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | - Marcelo Henrique Santos Paiva
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
- Universidade Federal de Pernambuco, Centro Acadêmico do Agreste, Núcleo de Ciências da Vida, Caruaru, Pernambuco, Brazil
| | - Amanda Maria Cabral
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | | | - Luiz Fernando Freitas Pessoa
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | - Diego Felipe Araujo Diniz
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | - Elisama Helvecio
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | - Ellyda Vanessa Gomes da Silva
- Instituto Aggeu Magalhães/FIOCRUZ, Departamento de Entomologia. s/n Cidade Universitária, Recife, Pernambuco, Brazil
| | - Norma Machado da Silva
- Departamento de Biologia Celular, Embriologia e Genética – BEG, Universidade Federal de Santa Catarina, SC, Brasil. Campus Universitário Reitor João David Ferreira Lima, Bairro Trindade, Florianópolis, Santa Catarina, Brazil
| | | | - Claudenice Pontes
- State of Pernambuco Department of Health, Arbovirus Surveillance Manager Recife, Pernambuco, Brazil
| | - Vânia Nunes
- Secretaria Municipal de Saúde do Recife, Recife, Pernambuco, Brazil
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13
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Valle D, Bellinato DF, Viana-Medeiros PF, Lima JBP, Martins Junior ADJ. Resistance to temephos and deltamethrin in Aedes aegypti from Brazil between 1985 and 2017. Mem Inst Oswaldo Cruz 2019; 114:e180544. [PMID: 31038548 PMCID: PMC6489372 DOI: 10.1590/0074-02760180544] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 03/27/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Aedes aegypti populations in Brazil have been subjected to insecticide selection pressures with variable levels and sources since 1967. Therefore, the Brazilian Ministry of Health (MoH) coordinated the activities of an Ae. aegypti insecticide resistance monitoring network (MoReNAa) from 1999 to 2012. OBJECTIVES The objective of this study was to consolidate all information available from between 1985 and 2017 regarding the resistance status and mechanisms of Brazilian Ae. aegypti populations against the main insecticide compounds used at the national level, including the larvicide temephos (an organophosphate) and the adulticide deltamethrin (a pyrethroid). METHODS Data were gathered from two sources: a bibliographic review of studies published from 1985 to 2017, and unpublished data produced by our team within the MoReNAa between 1998 and 2012. A total of 146 municipalities were included, many of which were evaluated several times, totalling 457 evaluations for temephos and 274 for deltamethrin. Insecticide resistance data from the five Brazilian regions were examined separately using annual records of both the MoH supply of insecticides to each state and the dengue incidence in each evaluated municipality. FINDINGS Ae. aegypti resistance to temephos and deltamethrin, the main larvicide and adulticide, respectively, employed against mosquitoes in Brazil for a long time, was found to be widespread in the country, although with some regional variations. Comparisons between metabolic and target-site resistance mechanisms showed that one or another of these was the main component of pesticide resistance in each studied population. MAIN CONCLUSIONS (i) A robust dataset on the assessments of the insecticide resistance of Brazilian Ae. aegypti populations performed since 1985 was made available through our study. (ii) Our findings call into question the efficacy of chemical control as the sole methodology of vector control. (iii) It is necessary to ensure that sustainable insecticide resistance monitoring is maintained as a key component of integrated vector management. (iv) Consideration of additional parameters, beyond the supply of insecticides distributed by the MoH or the diverse local dynamics of dengue incidence, is necessary to find consistent correlations with heterogeneous vector resistance profiles.
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Affiliation(s)
- Denise Valle
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular de Flavivírus, Rio de Janeiro, RJ, Brasil.,Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brasil
| | - Diogo Fernandes Bellinato
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular de Flavivírus, Rio de Janeiro, RJ, Brasil.,Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Fisiologia e Controle de Artrópodes Vetores, Rio de Janeiro, RJ, Brasil
| | | | - José Bento Pereira Lima
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Fisiologia e Controle de Artrópodes Vetores, Rio de Janeiro, RJ, Brasil.,Instituto de Biologia do Exército, Rio de Janeiro, RJ, Brasil
| | - Ademir de Jesus Martins Junior
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Fisiologia e Controle de Artrópodes Vetores, Rio de Janeiro, RJ, Brasil.,Instituto de Biologia do Exército, Rio de Janeiro, RJ, Brasil.,Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brasil
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Mang'era CM, Hassanali A, Khamis FM, Rono MK, Lwande W, Mbogo C, Mireji PO. Growth-disrupting Murraya koenigii leaf extracts on Anopheles gambiae larvae and identification of associated candidate bioactive constituents. Acta Trop 2019; 190:304-311. [PMID: 30529445 DOI: 10.1016/j.actatropica.2018.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/06/2018] [Accepted: 12/06/2018] [Indexed: 12/27/2022]
Abstract
Plant-based constituents have been proposed as eco-friendly alternatives to synthetic insecticides for control of mosquito vectors of malaria. In this study, we first screened the effects of methanolic leaf extracts of curry tree (Murraya koenigii) growing in tropical (Mombasa, Malindi) and semi-arid (Kibwezi, and Makindu) ecological zones of Kenya on third instar An. gambiae s.s. larvae. Extracts of the plant from the semi-arid region, and particularly from Kibwezi, led to high mortality of the larvae. Bioassay-guided fractionation of the methanolic extract of the leaves of the plants from Kibwezi was then undertaken and the most active fraction (20 fold more potent than the crude extract) was then analyzed by Liquid chromatography quadruple time of flight coupled with mass spectrometry (LC-QtoF-MS) and a number of constituents were identified, including a major alkaloid constituent, Neplanocin A (5). Exposure of the third instar larvae to a sub-lethal dose (4.43 ppm) of this fraction over 7-day periods induced gross morphogenetic abnormalities in the larvae, with reduced locomotion, and delayed pupation. Moreover, the few adults that emerged from some pupae failed to fly from the water surface, unlike in the untreated control group. These results demonstrate subtle growth-disrupting effects of the phytochemical blend from M. koenigii leaves on aquatic stages An. gambiae mosquito. The study lays down some useful groundwork for the downstream development of phytochemical blends that can be evaluated for integration into eco-friendly control of An. gambiae vector population targeting the often overlooked but important immature stages of the malaria vector.
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Affiliation(s)
- Clarence Maikuri Mang'era
- Department of Biochemistry and Molecular Biology, Egerton University, Njoro Campus, PO Box, 536 - 20115, Egerton, Kenya; Department of Biochemistry and Biotechnology, School of Pure and Applied Sciences, Kenyatta University, Ruiru Campus, PO Box, 43844-00100, Nairobi, Kenya; International Centre of Insect Physiology and Ecology (icipe), Duduville Campus, Kasarani, PO Box, 30772-00100, Nairobi, Kenya.
| | - Ahmed Hassanali
- Department of Chemistry, School of Pure and Applied Sciences, Kenyatta University, Ruiru Campus, PO Box, 43844-00100, Nairobi, Kenya.
| | - Fathiya M Khamis
- International Centre of Insect Physiology and Ecology (icipe), Duduville Campus, Kasarani, PO Box, 30772-00100, Nairobi, Kenya.
| | - Martin K Rono
- Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute, PO Box, 230-80108, Kilifi, Kenya.
| | - Wilber Lwande
- International Centre of Insect Physiology and Ecology (icipe), Duduville Campus, Kasarani, PO Box, 30772-00100, Nairobi, Kenya.
| | - Charles Mbogo
- Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute, PO Box, 230-80108, Kilifi, Kenya.
| | - Paul O Mireji
- Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute, PO Box, 230-80108, Kilifi, Kenya; Biotechnology Research Institute - Kenya Agricultural and Livestock Research Organization, PO Box, 362-00902, Kikuyu, Kenya.
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15
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Gomes da Rocha Voris D, Dos Santos Dias L, Alencar Lima J, Dos Santos Cople Lima K, Pereira Lima JB, Dos Santos Lima AL. Evaluation of larvicidal, adulticidal, and anticholinesterase activities of essential oils of Illicium verum Hook. f., Pimenta dioica (L.) Merr., and Myristica fragrans Houtt. against Zika virus vectors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22541-22551. [PMID: 29808407 DOI: 10.1007/s11356-018-2362-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Aedes aegypti is the vector responsible for transmitting pathogens that cause various infectious diseases, such as dengue, Zika, yellow fever, and chikungunya, worrying health authorities in the tropics. Due to resistance of mosquitoes to synthetic insecticides, the search for more effective insecticidal agents becomes crucial. The aim of this study was to verify the larvicidal, adulticidal, and anticholinesterase activities of the essential oils of the Illicium verum (EOIV), Pimenta dioica (EOPD), and Myristica fragrans (EOMF) against Ae. aegypti. The essential oils (EOs) were obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). The larvicidal and adulticidal activities of EOs were evaluated against third instar larvae and Ae. aegypti adult females, respectively, using the procedures of the World Health Organization (WHO) and the anticholinesterase activity of the EOs by the modified Ellman method. The following major components were identified: (E)-anethole (90.1%) for EOIV, methyl eugenol (55.0%) for EOPD, and sabinene (52.1%) for EOMF. All EOs exhibited larvicidal and adulticidal activity against Ae. aegypti. The highest larval mortality was observed in EOMF with LC50 = 28.2 μg mL-1. Adult mortality was observed after 1 (knockdown) and 24 h exposure, with the highest potential established by the EOIV, KC50 = 7.3 μg mg female-1 and LC50 = 10.3 μg mg female-1. EOIV (IC50 = 4800 μg mL-1), EOMF (IC50 = 4510 μg mL-1), and EOPD (IC50 = 1320 μg mL-1) inhibited AChE. EOMF (4130 μg mL-1) and EOPD (IC50 = 3340 μg mL-1) inhibited BChE whereas EOIV showed no inhibition. The EOs were toxic to larvae and adults of Ae. aegypti, as well as being less toxic to humans than the currently used insecticides, opening the possibility of elaboration of a natural, safe, and ecological bioinsecticide for vector control.
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Affiliation(s)
- Diego Gomes da Rocha Voris
- Section of Chemical Engineering, Chemical and Biological Defence Laboratory, Military Institute of Engineering, Rio de Janeiro, RJ, 22291-270, Brazil.
| | - Luciana Dos Santos Dias
- Laboratory of Physiology and Control of Vector Arthropods, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- Entomology Laboratory, Institute of Biology of the Army, Rio de Janeiro, RJ, 20911-270, Brazil
| | - Josélia Alencar Lima
- Section of Chemical Engineering, Chemical and Biological Defence Laboratory, Military Institute of Engineering, Rio de Janeiro, RJ, 22291-270, Brazil
| | - Keila Dos Santos Cople Lima
- Section of Chemical Engineering, Chemical and Biological Defence Laboratory, Military Institute of Engineering, Rio de Janeiro, RJ, 22291-270, Brazil
| | - José Bento Pereira Lima
- Laboratory of Physiology and Control of Vector Arthropods, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- Entomology Laboratory, Institute of Biology of the Army, Rio de Janeiro, RJ, 20911-270, Brazil
| | - Antônio Luís Dos Santos Lima
- Section of Chemical Engineering, Chemical and Biological Defence Laboratory, Military Institute of Engineering, Rio de Janeiro, RJ, 22291-270, Brazil
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16
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Corte RL, Melo VAD, Dolabella SS, Marteis LS. Variation in temephos resistance in field populations of Aedes aegypti (Diptera: Culicidae) in the State of Sergipe, Northeast Brazil. Rev Soc Bras Med Trop 2018; 51:284-290. [PMID: 29972557 DOI: 10.1590/0037-8682-0449-2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 05/18/2018] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION The organophosphate temephos was first used in Brazil in the 1960s for the control of Aedes aegypti. Because of its extensive and longstanding use worldwide, selection for mosquito populations resistant to the chemical has been observed not only in different regions of Brazil but also in several parts of the world. The objective of this study was to evaluate the susceptibility of Ae. aegypti to the organophosphate temephos, a larvicide used in vector control activities in Sergipe/Northeast Brazil. METHODS This study included mosquito populations from seven municipalities of Sergipe and was carried out from October 2010 to August 2011. Qualitative bioassays of diagnostic dose and dose responses were performed. The resistance ratio was calculated based on lethal concentrations for mosquitoes of the susceptible Rockefeller strain. RESULTS All populations were classified as resistant to temephos. The resistance ratio ranged from 22.2 to 297.9, the lowest being seen in Aracaju, a coastal area of the state, and the highest in Pinhão, a semi-arid region, 96.6km from Aracaju. CONCLUSIONS High levels of temephos resistance were observed in the Ae. aegypti populations of Sergipe. The variation between regions indicates that there have been different regimes of insecticide use and also points to the potential of small cities to generate and spread insecticide resistance.
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Affiliation(s)
- Roseli La Corte
- Departamento de Morfologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil.,Programa de Pós-Graduação em Biologia Parasitária, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | | | - Silvio Santana Dolabella
- Departamento de Morfologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil.,Programa de Pós-Graduação em Biologia Parasitária, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - Leticia Silva Marteis
- Colegiado de Medicina, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brasil
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Garcia GDA, David MR, Martins ADJ, Maciel-de-Freitas R, Linss JGB, Araújo SC, Lima JBP, Valle D. The impact of insecticide applications on the dynamics of resistance: The case of four Aedes aegypti populations from different Brazilian regions. PLoS Negl Trop Dis 2018; 12:e0006227. [PMID: 29432488 PMCID: PMC5833288 DOI: 10.1371/journal.pntd.0006227] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 03/01/2018] [Accepted: 01/09/2018] [Indexed: 01/16/2023] Open
Abstract
Background In the tropics, the utilization of insecticides is still an important strategy for controlling Aedes aegypti, the principle vector of dengue, chikungunya and Zika viruses. However, increasing insecticide resistance in Ae. aegypti populations might hinder insecticide efficacy on a long-term basis. It will be important to understand the dynamics and evolution of insecticide resistance by assessing its frequency and the mechanisms by which it occurs. Methodology/Principal findings The insecticide resistance status of four Brazilian Ae. aegypti populations was monitored. Quantitative bioassays with the major insecticides employed in the country was performed: the adulticide deltamethrin (a pyrethroid—PY) and the larvicides, temephos (an organophosphate) and diflubenzuron (a chitin synthesis inhibitor). Temephos resistance was detected in all populations although exhibiting a slight decrease over time probably due to the interruption of field use. All vector populations were susceptible to diflubenzuron, recently introduced in the country to control Ae. aegypti. Resistance against deltamethrin was extremely high in three populations. Molecular assays investigated substitutions in the voltage gated sodium channel (NaV), the PY target site, at positions 1011, 1016 and 1534. Elevated frequencies of substitutions Val1016Ile and Phe1534Cys related to high PY resistance levels were identified. Biochemical assays detected alterations in the activities of two detoxifying enzyme classes related to metabolic resistance, glutathion-S-transferases and esterases. The results obtained were evaluated in the context of both recent insecticide use and the records of dengue incidence in each locality. Conclusions/Significance The four Ae. aegypti populations evaluated were resistant to the neurotoxic insecticides, temephos and deltamethrin. However, they were still susceptible to diflubenzuron. A probable correlation between adult insect resistance to PY and the domestic application of insecticides is discussed, pointing to the need for awareness measures regarding the correct utilization by citizens. This work aims to contribute to the efficient and rational management of Ae. aegypti control of both larvae and adults. Among the pathogens transmitted by Aedes aegypti, dengue virus is the most important due to the number of people affected or at risk and the high rate of mortality worldwide. The confirmation that Ae. aegypti is also the vector of Zika, chikungunya and urban yellow fever poses serious consequences for public health, pointing to the need of reevaluating current vector control strategies. Although there is growing recognition of the importance of social participation and community engagement to prevent high levels of infestation, insecticides are considered important vector control tools. Nevertheless, the massive and indiscriminate adoption of insecticides to control larvae and adults contributes to resistance spread. In particular, the domestic use of adulticides, especially in epidemic seasons, is assumed to induce high levels of resistance in Ae. aegypti populations. However, the consequences of insecticide interruption upon the resistance of field populations has been less investigated. We evaluated, in four Brazilian regions over one year, the dynamics of dengue vector population resistance to the principal insecticides used in the country. The main resistance mechanisms were also investigated. Data are discussed taking into account the potential relationship among dengue outbreaks, public and private chemical control and insecticide resistance.
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Affiliation(s)
- Gabriela de Azambuja Garcia
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Mariana Rocha David
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Ademir de Jesus Martins
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rafael Maciel-de-Freitas
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jutta Gerlinde Birggitt Linss
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Simone Costa Araújo
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- Gerência de Controle de Zoonoses, Secretaria Municipal de Saúde, Belo Horizonte/Minas Gerais, Brazil
| | - José Bento Pereira Lima
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Denise Valle
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratório de Biologia Molecular de Flavivírus, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- * E-mail:
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18
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Corbel V, Fonseca DM, Weetman D, Pinto J, Achee NL, Chandre F, Coulibaly MB, Dusfour I, Grieco J, Juntarajumnong W, Lenhart A, Martins AJ, Moyes C, Ng LC, Raghavendra K, Vatandoost H, Vontas J, Muller P, Kasai S, Fouque F, Velayudhan R, Durot C, David JP. International workshop on insecticide resistance in vectors of arboviruses, December 2016, Rio de Janeiro, Brazil. Parasit Vectors 2017; 10:278. [PMID: 28577363 PMCID: PMC5457540 DOI: 10.1186/s13071-017-2224-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/26/2017] [Indexed: 11/21/2022] Open
Abstract
Vector-borne diseases transmitted by insect vectors such as mosquitoes occur in over 100 countries and affect almost half of the world’s population. Dengue is currently the most prevalent arboviral disease but chikungunya, Zika and yellow fever show increasing prevalence and severity. Vector control, mainly by the use of insecticides, play a key role in disease prevention but the use of the same chemicals for more than 40 years, together with the dissemination of mosquitoes by trade and environmental changes, resulted in the global spread of insecticide resistance. In this context, innovative tools and strategies for vector control, including the management of resistance, are urgently needed. This report summarizes the main outputs of the first international workshop on Insecticide resistance in vectors of arboviruses held in Rio de Janeiro, Brazil, 5–8 December 2016. The primary aims of this workshop were to identify strategies for the development and implementation of standardized insecticide resistance management, also to allow comparisons across nations and across time, and to define research priorities for control of vectors of arboviruses. The workshop brought together 163 participants from 28 nationalities and was accessible, live, through the web (> 70,000 web-accesses over 3 days).
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Affiliation(s)
- Vincent Corbel
- Institut de Recherche pour le Développement (IRD), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC, UM1-CNRS 5290-IRD 224), B.P. 64501, 911 Avenue Agropolis, 34394, Cedex 5, Montpellier, France.
| | - Dina M Fonseca
- Rutgers University (RU), Center for Vector Biology, 180 Jones Avenue, New Brunswick, NJ, 08901, USA
| | - David Weetman
- Liverpool School of Tropical Medicine (LSTM), Department of Vector Biology, Pembroke Place, Liverpool, L35QA, UK
| | - João Pinto
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL, Rua da Junqueira 100, 1349-008, Lisbon, Portugal
| | - Nicole L Achee
- Department of Biological Sciences, University of Notre Dame (UND), Eck Institute for Global Health, 239 Galvin Life Science Center, Notre Dame, Indiana, 46556, USA
| | - Fabrice Chandre
- Institut de Recherche pour le Développement (IRD), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC, UM1-CNRS 5290-IRD 224), B.P. 64501, 911 Avenue Agropolis, 34394, Cedex 5, Montpellier, France
| | - Mamadou B Coulibaly
- Malaria Research and Training Center (MRTC), Point G, Bamako, B.P, 1805, Mali
| | - Isabelle Dusfour
- Institut Pasteur de la Guyane (IPG), 23 avenue Pasteur B.P. 6010, 97306, Cedex, Cayenne, French Guiana
| | - John Grieco
- Department of Biological Sciences, University of Notre Dame (UND), Eck Institute for Global Health, 239 Galvin Life Science Center, Notre Dame, Indiana, 46556, USA
| | - Waraporn Juntarajumnong
- Department of Entomology, Kasetsart University (KU), 50 Ngam Wong Wan Rd, Ladyaow, Bangkok, Chatuchak, 10900, Thailand
| | - Audrey Lenhart
- Center for Global Health/Division of Parasitic Diseases and Malaria/Entomology Branch, U.S. Centers for Disease Control and Prevention (CDC), 1600 Clifton Rd. NE, MS G-49; Bldg. 23, Atlanta, GA, 30329, USA
| | - Ademir J Martins
- Instituto Oswaldo Cruz (Fiocruz), Avenida Brasil 4365, Rio de Janeiro/RJ CEP, Manguinhos, 21040-360, Brazil
| | - Catherine Moyes
- Big Data Institute, Li Ka Shing Centre for Health Information and Discovery, University of Oxford, Oxford, OX3 7LF, UK
| | - Lee Ching Ng
- Environmental Health Institute (EHI), National Environment Agency (NEA), 11 Biopolis Way, Helios Block, #04-03/04 & #06-05/08, Singapore, Republic of Singapore
| | - Kamaraju Raghavendra
- National Institute of Malaria Research (NIMR), Department of Health Research, GoI Sector 8, Dwarka, Delhi, 110 077, India
| | - Hassan Vatandoost
- Department of Medical Entomology & Vector Control, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences (TUMS), Pour Sina Street, P.O. Box: 14155-6446, Tehran, Iran
| | - John Vontas
- Institute Molecular Biology and Biotechnology (IMBB), Foundation for Research and Technology (FORTH), Panepistimioupoli, Voutes, 70013, Heraklio, Crete, Greece.,Pesticide Science Laboratory, Agricultural University of Athens, Ieara Odoes 75, 118, Athens, Greece
| | - Pie Muller
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Socinstrasse 57, PO Box 4002, Basel, Switzerland
| | - Shinji Kasai
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjukuku, Tokyo, Japan
| | - Florence Fouque
- Vector Environment and Society Unit, The Special Programme for Research and Training in Tropical Diseases World Health Organization, 20, avenue Appia, CH-1211, 27, Geneva, Switzerland
| | - Raman Velayudhan
- Vector Ecology and Management, Department of Control of Neglected Tropical Diseases (HTM/NTD), World Health Organization, 20 Avenue Appia, CH-1211, 27, Geneva, Switzerland
| | - Claire Durot
- Institut de Recherche pour le Développement (IRD), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC, UM1-CNRS 5290-IRD 224), B.P. 64501, 911 Avenue Agropolis, 34394, Cedex 5, Montpellier, France
| | - Jean-Philippe David
- Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecologie Alpine (LECA), UMR 5553 CNRS Université Grenoble-Alpes, Domaine universitaire de Saint-Martin d'Hères, 2233 rue de la piscine, 38041, Cedex 9, Grenoble, France.
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dos Santos Dias L, Macoris MDLDG, Andrighetti MTM, Otrera VCG, Dias ADS, Bauzer LGSDR, Rodovalho CDM, Martins AJ, Lima JBP. Toxicity of spinosad to temephos-resistant Aedes aegypti populations in Brazil. PLoS One 2017; 12:e0173689. [PMID: 28301568 PMCID: PMC5354417 DOI: 10.1371/journal.pone.0173689] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 02/26/2017] [Indexed: 01/11/2023] Open
Abstract
The mosquito Aedes aegypti is the primary vector of different arboviruses and represents a major public health problem. Several Brazilian populations of Ae. aegypti have developed resistance to temephos, the most used organophosphate larvicide. New tools which are less harmful to the environment and safer for humans are becoming increasingly important to control this insect vector. Spinosad, an aerobic fermentation product of a soil actinobacteria, has a favorable environmental profile. It presents selective insecticide properties, a mechanism of action that differs from those of many synthetic chemical insecticides. The toxicity of spinosad and temephos to Aedes aegypti populations from Brazil, which were previously exposed to temephos, were investigated in this study. Larval susceptibility (LC50) to temephos varied from 3μg/L for Rockefeller up to 260 μg/L for Santana do Ipanema field derived population. Larval susceptibility (LC50) to spinosad varied from 23μg/L for Rockefeller up to 93μg/L for Marilia field derived population. In addition, a semi-field trial was performed to evaluate spinosad (NatularTM DT) initial efficacy and persistence toward four field-derived lineages and the Rockefeller lineage, used as an internal control. Spinosad was tested at 0.5mg active ingredient/L in 200L capacity water tanks. Mortality was recorded each 24 hours after exposition and tanks were further recolonized once per week with mortality being recorded daily for eight weeks. Spinosad provided a level equal or superior to 80% mortality during a seven to eight week evaluation period. The assessed populations did not present cross-resistance between spinosad and temephos in laboratory conditions. It demonstrates that spinosad may be a promising larvicide for the control of Ae. aegypti, especially for populations in which resistance to temephos has been detected.
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Affiliation(s)
- Luciana dos Santos Dias
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
| | | | | | | | - Adriana dos Santos Dias
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
| | - Luiz Guilherme Soares da Rocha Bauzer
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
| | - Cynara de Melo Rodovalho
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
| | - Ademir Jesus Martins
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
| | - José Bento Pereira Lima
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ—Brasil
- Laboratório de Entomologia, Instituto de Biologia do Exército, Rio de Janeiro, RJ—Brasil
- * E-mail:
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Triflumuron Effects on the Physiology and Reproduction of Rhodnius prolixus Adult Females. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8603140. [PMID: 27822479 PMCID: PMC5086386 DOI: 10.1155/2016/8603140] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 09/18/2016] [Indexed: 11/17/2022]
Abstract
We evaluated the efficacy of the growth regulator triflumuron (TFM) in inducing mortality and disrupting both oviposition and egg hatching in Rhodnius prolixus adult females. TFM was administered via feeding, topically or by continuous contact with impregnated surfaces. Feeding resulted in mild biological effects compared with topical and impregnated surfaces. One day after treatment, the highest mortality levels were observed with topical surface and 30 days later both topical and impregnated surfaces induced higher mortalities than feeding. Oral treatment inhibited oviposition even at lower doses, and hatching of eggs deposited by treated females was similarly affected by the three delivery modes. Topical treatment of eggs deposited by nontreated females significantly reduced hatching. However, treatment per contact of eggs oviposited by untreated females did not disrupt eclosion. Additionally, oral treatment increased the number of immature oocytes per female, and topical treatment reduced the mean size of oocytes. TFM also affected carcass chitin content, diuresis, and innate immunity of treated insects. These results suggest that TFM acts as a potent growth inhibitor of R. prolixus adult females and has the potential to be used in integrated vector control programs against hematophagous triatomine species.
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Resistance Status to the Insecticides Temephos, Deltamethrin, and Diflubenzuron in Brazilian Aedes aegypti Populations. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8603263. [PMID: 27419140 PMCID: PMC4932163 DOI: 10.1155/2016/8603263] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 04/27/2016] [Accepted: 05/09/2016] [Indexed: 01/10/2023]
Abstract
Insecticides are still largely applied in public health to control disease vectors. In Brazil, organophosphates (OP) and pyrethroids (PY) are used against Aedes aegypti for years. Since 2009 Insect Growth Regulators (IGR) are also employed in the control of larvae. We quantified resistance to temephos (OP), deltamethrin (PY), and diflubenzuron (IGR) of A. aegypti samples from 12 municipalities distributed throughout the country, collected between 2010 and 2012. High levels of resistance to neurotoxic insecticides were detected in almost all populations: RR95 to temephos varied between 4.0 and 27.1; the lowest RR95 to deltamethrin was 13.1, and values higher than 70.0 were found. In contrast, all samples were susceptible to diflubenzuron (RR95 < 2.3). Biochemical tests performed with larvae and adults discarded the participation of acetylcholinesterase, the OP target, and confirmed involvement of the detoxifying enzymes esterases, mixed function oxidases, and glutathione-S-transferases. The results obtained were discussed taking into account the public chemical control component and the increase in the domestic use of insecticides during dengue epidemic seasons in the evaluated municipalities.
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Chediak M, G Pimenta F, Coelho GE, Braga IA, Lima JBP, Cavalcante KRL, Sousa LCD, Melo-Santos MAVD, Macoris MDLDG, Araújo APD, Ayres CFJ, Andrighetti MTM, Gomes RGDA, Campos KB, Guedes RNC. Spatial and temporal country-wide survey of temephos resistance in Brazilian populations of Aedes aegypti. Mem Inst Oswaldo Cruz 2016; 111:311-21. [PMID: 27143489 PMCID: PMC4878300 DOI: 10.1590/0074-02760150409] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 03/17/2016] [Indexed: 11/22/2022] Open
Abstract
The organophosphate temephos has been the main insecticide used against larvae of the
dengue and yellow fever mosquito (Aedes aegypti) in Brazil since the
mid-1980s. Reports of resistance date back to 1995; however, no systematic reports of
widespread temephos resistance have occurred to date. As resistance investigation is
paramount for strategic decision-making by health officials, our objective here was
to investigate the spatial and temporal spread of temephos resistance in Ae.
aegypti in Brazil for the last 12 years using discriminating temephos
concentrations and the bioassay protocols of the World Health Organization. The
mortality results obtained were subjected to spatial analysis for distance
interpolation using semi-variance models to generate maps that depict the spread of
temephos resistance in Brazil since 1999. The problem has been expanding. Since
2002-2003, approximately half the country has exhibited mosquito populations
resistant to temephos. The frequency of temephos resistance and, likely, control
failures, which start when the insecticide mortality level drops below 80%, has
increased even further since 2004. Few parts of Brazil are able to achieve the target
80% efficacy threshold by 2010/2011, resulting in a significant risk of control
failure by temephos in most of the country. The widespread resistance to temephos in
Brazilian Ae. aegypti populations greatly compromise effective
mosquito control efforts using this insecticide and indicates the urgent need to
identify alternative insecticides aided by the preventive elimination of potential
mosquito breeding sites.
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Affiliation(s)
- Mateus Chediak
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brasil
| | - Fabiano G Pimenta
- Secretaria Municipal de Saúde de Belo Horizonte, Belo Horizonte, MG, Brasil
| | - Giovanini E Coelho
- Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF, Brasil
| | - Ima A Braga
- Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF, Brasil
| | - José Bento P Lima
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | | | | | | | - Ana Paula de Araújo
- Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, PE, Brasil
| | | | | | | | - Kauara B Campos
- Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF, Brasil
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Anholeti MC, Duprat RC, Figueiredo MR, Kaplan MA, Santos MG, Gonzalez MS, Ratcliffe NA, Feder D, Paiva SR, Mello CB. Biocontrol evaluation of extracts and a major component, clusianone, from Clusia fluminensis Planch. & Triana against Aedes aegypti. Mem Inst Oswaldo Cruz 2015. [PMID: 26200711 PMCID: PMC4569826 DOI: 10.1590/0074-02760150103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Studies evaluated the effects of hexanic extracts from the fruits and flowers
ofClusia fluminensis and the main component of the flower
extract, a purified benzophenone (clusianone), against Aedes
aegypti. The treatment of larvae with the crude fruit or flower extracts
from C. fluminensis did not affect the survival ofAe.
aegypti (50 mg/L), however, the flower extracts significantly delayed
development of Ae. aegypti. In contrast, the clusianone (50 mg/L) isolate from the
flower extract, representing 54.85% of this sample composition, showed a highly
significant inhibition of survival, killing 93.3% of the larvae and completely
blocking development of Ae. aegypti. The results showed, for the first time, high
activity of clusianone against Ae. aegypti that both killed and inhibited mosquito
development. Therefore, clusianone has potential for development as a biopesticide
for controlling insect vectors of tropical diseases. Future work will elucidate the
mode of action of clusianone isolated from C. fluminensis.
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Affiliation(s)
- Maria C Anholeti
- Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Rodrigo C Duprat
- Laboratório de Biologia de Insetos, Universidade Federal Fluminense, Niterói, RJ, BR
| | - Maria R Figueiredo
- Laboratório de Química de Produtos Naturais, Farmanguinhos, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Maria Ac Kaplan
- nstituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Marcelo Guerra Santos
- Departamento de Ciências, Faculdade de Formação de Professores, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Marcelo S Gonzalez
- Laboratório de Biologia de Insetos, Universidade Federal Fluminense, Niterói, RJ, BR
| | - Norman A Ratcliffe
- Laboratório de Biologia de Insetos, Universidade Federal Fluminense, Niterói, RJ, BR
| | - Denise Feder
- Laboratório de Biologia de Insetos, Universidade Federal Fluminense, Niterói, RJ, BR
| | - Selma R Paiva
- Laboratório de Botânica Estrutural e Funcional, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, BR
| | - Cicero B Mello
- Laboratório de Biologia de Insetos, Universidade Federal Fluminense, Niterói, RJ, BR
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Belinato TA, Valle D. The Impact of Selection with Diflubenzuron, a Chitin Synthesis Inhibitor, on the Fitness of Two Brazilian Aedes aegypti Field Populations. PLoS One 2015; 10:e0130719. [PMID: 26107715 PMCID: PMC4481264 DOI: 10.1371/journal.pone.0130719] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/23/2015] [Indexed: 11/18/2022] Open
Abstract
Several Aedes aegypti field populations are resistant to neurotoxic insecticides, mainly organophoshates and pyrethroids, which are extensively used as larvicides and adulticides, respectively. Diflubenzuron (DFB), a chitin synthesis inhibitor (CSI), was recently approved for use in drinking water, and is presently employed in Brazil for Ae. aegypti control, against populations resistant to the organophosphate temephos. However, tests of DFB efficacy against field Ae. aegypti populations are lacking. In addition, information regarding the dynamics of CSI resistance, and characterization of any potential fitness effects that may arise in conjunction with resistance are essential for new Ae. aegypti control strategies. Here, the efficacy of DFB was evaluated for two Brazilian Ae. aegypti populations known to be resistant to both temephos and the pyrethroid deltamethrin. Laboratory selection for DFB resistance was then performed over six or seven generations, using a fixed dose of insecticide that inhibited 80% of adult emergence in the first generation. The selection process was stopped when adult emergence in the diflubenzuron-treated groups was equivalent to that of the control groups, kept without insecticide. Diflubenzuron was effective against the two Ae. aegypti field populations evaluated, regardless of their resistance level to neurotoxic insecticides. However, only a few generations of DFB selection were sufficient to change the susceptible status of both populations to this compound. Several aspects of mosquito biology were affected in both selected populations, indicating that diflubenzuron resistance acquisition is associated with a fitness cost. We believe that these results can significantly contribute to the design of control strategies involving the use of insect growth regulators.
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Affiliation(s)
- Thiago Affonso Belinato
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz (Fiocruz), Rio de Janeiro (RJ), Brasil
| | - Denise Valle
- Laboratório de Biologia Molecular de Flavivírus, Instituto Oswaldo Cruz (Fiocruz), Rio de Janeiro (RJ), Brasil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular (INCT-EM), Rio de Janeiro (RJ), Brasil
- * E-mail:
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Su T, Cheng ML, Melgoza A, Thieme J. Laboratory and Field Evaluations of Mosquiron® 0.12CRD, a New Formulation of Novaluron, Against Culex Mosquitoes. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2014; 30:284-290. [PMID: 25843134 DOI: 10.2987/14-6433r.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Laboratory and field evaluations were conducted to assess the activity and efficacy of Mosquiron® 0.12CRD, a new formulation containing 0.12% novaluron, against immature Culex mosquitoes. In laboratory bioassays, this formulation was highly active against Culex quinquefasciatus as indicated by low inhibition of emergence (IE) values (IE50 and IE90). When Mosquiron 0.12CRD was applied at 1 briquet per underground stormwater vault, counts of late instars showed a significant reduction on day 28 posttreatment. When the late instars and pupae collected from Mosquiron-treated water were brought back to the laboratory for posttreatment observation, emergence inhibition was >90% on day 7. When the late instars from a laboratory colony of Cx. quinquefasciatus were exposed to the Mosquiron-treated water, 99% and 95% emergence inhibition was noted on day 7 and day 14, respectively. When Mosquiron 0.12CRD was applied at 11 briquets per vault, significant reductions of larval populations were encountered on days 7 and 35 posttreatment for early instars, and on days 14, 21, and 35 posttreatment for late instars. Laboratory observation of late instars and pupae sampled from the treated vault water showed nearly complete emergence inhibition from day 7 to day 28 posttreatment. A similar trend was observed in laboratory-reared late instars of Cx. quinquefasciatus when exposed to the treated water. Preliminary evaluations indicated that Mosquiron 0.12CRD is a useful new tool to control Culex mosquitoes breeding in persistent sources.
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Affiliation(s)
- Tianyun Su
- West Valley Mosquito and Vector Control District, 1295 E Locust Street, Ontario, CA 91761
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Munhoz VM, Longhini R, Souza JR, Zequi JA, Mello EVL, Lopes GC, Mello JC. Extraction of flavonoids from Tagetes patula: process optimization and screening for biological activity. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2014. [DOI: 10.1016/j.bjp.2014.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Vidal PO, Carvalho E, Suesdek L. Temporal variation of wing geometry in Aedes albopictus. Mem Inst Oswaldo Cruz 2013; 107:1030-4. [PMID: 23295754 DOI: 10.1590/s0074-02762012000800011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 09/14/2012] [Indexed: 11/21/2022] Open
Abstract
Although native to the tropical and subtropical areas of Southeast Asia, Aedes albopictus is now found on five continents, primarily due to its great capacity to adapt to different environments. This species is considered a secondary vector of dengue virus in several countries. Wing geometric morphometrics is widely used to furnish morphological markers for the characterisation and identification of species of medical importance and for the assessment of population dynamics. In this work, we investigated the metric differentiation of the wings of Ae. albopictus samples collected over a four-year period (2007-2010) in São Paulo, Brazil. Wing size significantly decreased during this period for both sexes and the wing shape also changed over time, with the wing shapes of males showing greater differences after 2008 and those of females differing more after 2009. Given that the wings play sex-specific roles, these findings suggest that the males and females could be affected by differential evolutionary pressures. Consistent with this hypothesis, a sexually dimorphic pattern was detected and quantified: the females were larger than the males (with respect to the mean) and had a distinct wing shape, regardless of allometric effects. In conclusion, wing alterations, particularly those involving shape, are a sensitive indicator of microevolutionary processes in this species.
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Manrique-Saide P, Arisqueta-Chablé C, Geded-Moreno E, Herrera-Bojórquez J, Valentín UC, Chablé-Santos J, Che-Mendoza A, Sánchez EC, Arredondo-Jiménez JI, Medina-Barreiro A. An assessment of the importance of subsurface catch basins for Aedes aegypti adult production during the dry season in a neighborhood of Merida, Mexico. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2013; 29:164-7. [PMID: 23923331 DOI: 10.2987/12-6320r.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We compared the number of adult Aedes aegypti emerging from subsurface catch basins located in the streets against the number of pupae (as a proxy of adults emerging) from the entire container larval habitats found at residential premises within 1 ha of a neighborhood in the Mexican city of Merida during 8 days in the dry season of 2012. Aedes aegypti adults were collected from 60% of the subsurface catch basins. They produced 12 adults/day/ha (95% confidence interval [CI], 6.4 to 17.9), 5 females (95% CI, 2.1 to 7.7), and 7 males (95% CI, 3.8 to 10.7). In contrast, only 7 containers holding water were identified in 30 premises inspected, 1 bucket was positive for Ae. aegypti larvae, but no pupae-positive containers were found. No other mosquito species were found. This study revealed the importance of this type of nonresidential and subterranean aquatic habitat for Ae. aegypti adult production in this neighborhood of Merida during the dry season.
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Affiliation(s)
- Pablo Manrique-Saide
- Departamento de Zoología, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km. 15.5 Carr. Mérida-Xmatkuil s/n Mérida, C.P. 97315, Mérida, Yucatán, México
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Belinato TA, Martins AJ, Lima JBP, Valle D. Effect of triflumuron, a chitin synthesis inhibitor, on Aedes aegypti, Aedes albopictus and Culex quinquefasciatus under laboratory conditions. Parasit Vectors 2013; 6:83. [PMID: 23557173 PMCID: PMC3626716 DOI: 10.1186/1756-3305-6-83] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/22/2013] [Indexed: 12/03/2022] Open
Abstract
Background Resistance to traditional insecticides represents a threat to the control of disease vectors. The insect growth regulators (IGR) are a potential alternative to control mosquitoes, including resistant populations. The chitin synthesis inhibitors (CSI) are IGRs, which interfere with the insect molting process and represent one major class of compounds against Aedes aegypti populations resistant to the larvicide organophosphate temephos. In the present study, we evaluated the efficacy of the CSI triflumuron on Culex quinquefasciatus, Aedes albopictus and against several Ae. aegypti field populations. Methods The efficacy of triflumuron, against Cx. quinquefasciatus and Ae. albopictus was evaluated with laboratory strains through dose–response assays. Additionaly, this CSI was tested against seven Ae. aegypti field populations exhibiting distinct resistance levels to both temephos and the pyrethroid deltamethrin. Aedes aegypti populations were exposed to both a dose that inhibits 99% of the adult emergence of mosquitoes from the susceptible reference strain, Rockefeller, (EI99 = 3.95 μg/L) and the diagnostic dose (DD), corresponding to twice the EI99. Results Our results indicate that triflumuron was effective in emergence inhibition (EI) of Cx. quinquefasciatus (EI50= 5.28 μg/L; EI90= 12.47 μg/L) and Ae. albopictus (EI50= 1.59 μg/L; EI90= 2.63 μg/L). Triflumuron was also effective against seven Ae. aegypti Brazilian populations resistant to both temephos and deltamethrin. Exposure of all the Ae. aegypti populations to the triflumuron EI99 of the susceptible reference strain, Rockefeller, resulted in complete inhibition of adult emergence, suggesting no cross-resistance among traditional insecticides and this CSI. However, a positive correlation between temephos resistance and tolerance to triflumuron was observed. Conclusion The results suggest that triflumuron represents a potential tool for the control of disease vectors in public health. Nevertheless, they point to the need of constant monitoring of the susceptibility status of vector populations to CSIs.
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Affiliation(s)
- Thiago Affonso Belinato
- Laboratório de Fisiologia e Controle de Artrópodes Vetores, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro, RJ, Brazil
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