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Zhang DJ, Sun Y, Yamada H, Wu Y, Wang G, Feng QD, Paerhande D, Maiga H, Bouyer J, Qian J, Wu ZD, Zheng XY. Effects of radiation on the fitness, sterility and arbovirus susceptibility of a Wolbachia-free Aedes albopictus strain for use in the sterile insect technique. PEST MANAGEMENT SCIENCE 2023; 79:4186-4196. [PMID: 37318795 DOI: 10.1002/ps.7615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/06/2023] [Accepted: 06/15/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND The sterile insect technique (SIT) is a green and species-specific insect pest control technique that suppresses target populations by releasing factory-reared, radiosterilized males into the wild. Once released, it is important to be able to distinguish the released males from the wild males for monitoring purposes. Several methods to mark the sterile males exist. However, most have limitations due to monetary, process efficiency, or insect quality. Aedes albopictus is naturally infected with Wolbachia at a high prevalence, therefore the elimination of Wolbachia can serve as a biomarker to distinguish factory-reared male mosquitoes from wild conspecifics. RESULTS In this study, a Wolbachia-free Ae. albopictus GT strain was developed and its fitness evaluated, which was found to be comparable to the wild GUA strain. In addition, GT male mosquitoes were irradiated at the adult stage and a dose of 20 Gy or more induced over 99% sterility. Moreover, a dose of 30 Gy (almost completely sterilizing male and female mosquitoes) had limited effects on the mating competitiveness of GT males and the vector competence of GT females, respectively. However, radiation reduced mosquito longevity, regardless of sex. CONCLUSION Our results indicate that the Ae. albopictus GT strain can be distinguished from wild mosquitoes based on Wolbachia status and shows similar fitness, radio-sensitivity and arbovirus susceptibility to the GUA strain, indicating that it is feasible to use the GT strain to suppress Ae. albopictus populations for SIT programmes. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Dong-Jing Zhang
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- SYSU Nuclear and Insect Biotechnology Co., Ltd, Dongguan, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Tropical Disease Control, Hainan Medical University, Haikou, China
| | - Yan Sun
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- SYSU Nuclear and Insect Biotechnology Co., Ltd, Dongguan, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Hanano Yamada
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Yu Wu
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Gang Wang
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Qing-Deng Feng
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Dilinuer Paerhande
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Hamidou Maiga
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Vienna, Austria
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Bobo-Dioulasso, Burkina Faso
| | - Jérémy Bouyer
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Jun Qian
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Zhong-Dao Wu
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
| | - Xiao-Ying Zheng
- Chinese Atomic Energy Agency Center of Excellence on Nuclear Technology Applications for Insect Control, Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, China
- International Atomic Energy Agency Collaborating Centre, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Technology Research Center for Diseases-Vectors Control, Sun Yat-sen University, Guangzhou, China
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Vicencio D, Vasilieva O, Gajardo P. Monotonicity properties arising in a simple model of Wolbachia invasion for wild mosquito populations. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:1148-1175. [PMID: 36650806 DOI: 10.3934/mbe.2023053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this paper, we propose a simplified bidimensional Wolbachia infestation model in a population of Aedes aegypti mosquitoes, preserving the main features associated with the biology of this species that can be found in higher-dimensional models. Namely, our model represents the maternal transmission of the Wolbachia symbiont, expresses the reproductive phenotype of cytoplasmic incompatibility, accounts for different fecundities and mortalities of infected and wild insects, and exhibits the bistable nature leading to the so-called principle of competitive exclusion. Using tools borrowed from monotone dynamical system theory, in the proposed model, we prove the existence of an invariant threshold manifold that allows us to provide practical recommendations for performing single and periodic releases of Wolbachia-carrying mosquitoes, seeking the eventual elimination of wild insects that are capable of transmitting infections to humans. We illustrate these findings with numerical simulations using parameter values corresponding to the wMelPop strain of Wolbachia that is considered the best virus blocker but induces fitness loss in its carriers. In these tests, we considered multiple scenarios contrasting a periodic release strategy against a strategy with a single inundative release, comparing their effectiveness. Our study is presented as an expository and mathematically accessible tool to study the use of Wolbachia-based biocontrol versus more complex models.
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Affiliation(s)
- Diego Vicencio
- Departmento de Matemática, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso, 2390123, Chile
| | - Olga Vasilieva
- Departmento de Matemáticas, Universidad del Valle, Cl. 13,100-00, Cali, Valle del Cauca 760032, Colombia
| | - Pedro Gajardo
- Departmento de Matemática, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso, 2390123, Chile
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Claudel I, Brouazin R, Lancelot R, Gouagna LC, Dupraz M, Baldet T, Bouyer J. Optimization of adult mosquito trap settings to monitor populations of Aedes and Culex mosquitoes, vectors of arboviruses in La Reunion. Sci Rep 2022; 12:19544. [PMID: 36380224 PMCID: PMC9666360 DOI: 10.1038/s41598-022-24191-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
Competent arbovirus vectors are found in the culicid mosquito fauna of south-west Indian Ocean (SWIO) islands. In La Reunion, Aedes albopictus and Aedes aegypti mosquitoes are known vectors of dengue and chikungunya viruses. Culex quinquefasciatus is a potential vector of Rift Valley fever and West Nile viruses. To prepare a vector-control field trial against Ae. aegypti, this study aimed at identifying the best trapping strategy to catch adult Ae. aegypti, using BG-Sentinel traps (Biogents, Germany). It was implemented in two sites in southern La Reunion. Catches of Ae. albopictus and Cx. quinquefasciatus mosquitoes were also recorded. A Latin square design was used to estimate the detection probability and the apparent daily density-according to the BG-Sentinel trapping strategy: none, carbon dioxide (CO2), a commercial attractant-BG-Lure (Biogents, Germany), or both. The use of CO2 alone was associated with a higher detection probability for Ae. aegypti and Cx. quinquefasciatus mosquitoes, as well as a large increase in their apparent density. Traps with BG-Lure-alone or in combination with CO2, did not improve the detection probability of Ae. aegypti and Cx. quinquefasciatus mosquitoes. The same result was found for male Ae. albopictus. For females, baiting BG-Sentinel traps with CO2 or BG-Lure had no significant effect. The same apparent densities were found for Ae. aegypti and Ae. albopictus mosquitoes in both study sites-where Ae. aegypti mosquitoes were found at very low densities during previous surveys.
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Affiliation(s)
- Iris Claudel
- grid.121334.60000 0001 2097 0141UMR Mivegec (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 97410 Saint-Pierre, La Réunion France
| | - Ronan Brouazin
- grid.121334.60000 0001 2097 0141UMR Mivegec (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 97410 Saint-Pierre, La Réunion France
| | - Renaud Lancelot
- grid.121334.60000 0001 2097 0141UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398 Montpellier, France ,grid.8183.20000 0001 2153 9871Cirad, UMR Astre, 97491 Sainte Clotilde, La Réunion France
| | | | - Marlène Dupraz
- grid.121334.60000 0001 2097 0141UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398 Montpellier, France ,grid.8183.20000 0001 2153 9871Cirad, UMR Astre, 97491 Sainte Clotilde, La Réunion France
| | - Thierry Baldet
- grid.121334.60000 0001 2097 0141UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398 Montpellier, France ,grid.8183.20000 0001 2153 9871Cirad, UMR Astre, 97491 Sainte Clotilde, La Réunion France
| | - Jérémy Bouyer
- grid.121334.60000 0001 2097 0141UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398 Montpellier, France ,grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, IAEA Vienna, Wagramer Strasse 5, 1400 Vienna, Austria
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Carvalho DO, Morreale R, Stenhouse S, Hahn DA, Gomez M, Lloyd A, Hoel D. A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark-release-recapture. Parasit Vectors 2022; 15:402. [PMID: 36320036 PMCID: PMC9628054 DOI: 10.1186/s13071-022-05512-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 09/20/2022] [Indexed: 11/06/2022] Open
Abstract
Background The sterile insect technique (SIT), which involves area-wide inundative releases of sterile insects to suppress the reproduction of a target species, has proven to be an effective pest control method. The technique demands the continuous release of sterilized insects in quantities that ensure a high sterile male:wild male ratio for the suppression of the wild population over succeeding generations. Methods For these releases, it is important to determine several ecological and biological population parameters, including the longevity of the released males in the field, the dispersal of the released males and the wild pest population size. The Lee County Mosquito Control District initiated a study in a 47-ha portion of Captiva Island (Florida, USA), an island with a total area of 230 ha, to define biological SIT parameters for Aedes aegypti (L.), an invasive disease-vectoring mosquito known to be difficult to control due to a combination of daytime biting activity, use of cryptic breeding habitats that are difficult to target with conventional night-time ultra-low volume methods, and emerging resistance to commonly used insecticides. Another goal was to assess patterns of dispersal and survival for laboratory-reared sterile Ae. aegypti males released over time in the pilot site. These parameters will be used to evaluate the efficacy of a SIT suppression program for Ae. aegypti on Captiva Island. Results Over the course of seven mark-release-recapture studies using single- and multiple-point releases, 190,504 sterile marked males were released, for which the recapture rate was 1.5% over a mean period of 12 days. The mean distance traveled by sterile males of the local strain of Ae. aegypti that has colonized Captiva Island was 201.7 m from the release point, with an observed maximum traveled distance of 404.5 m. The released sterile mosquitoes had a probability of daily survival of 0.67 and an average life expectancy of ~ 2.46 days. Conclusions These data together with the population size estimate and sterile:wild ratio provide a solid basis for planning the SIT operational phase which is aimed at mosquito population suppression. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-022-05512-3.
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Affiliation(s)
- Danilo O. Carvalho
- grid.420221.70000 0004 0403 8399Insect Pest Control Subprogramme, Department of Nuclear Sciences and Applications, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, 1400 Vienna, Austria
| | - Rachel Morreale
- Lee County Mosquito Control District, 15191 Homestead Road, Lehigh Acres, FL 33971 USA
| | - Steven Stenhouse
- Lee County Mosquito Control District, 15191 Homestead Road, Lehigh Acres, FL 33971 USA
| | - Daniel A. Hahn
- grid.15276.370000 0004 1936 8091Department of Entomology and Nematology, University of Florida, 1881 Natural Area Drive, Gainesville, FL 32611 USA
| | - Maylen Gomez
- grid.420221.70000 0004 0403 8399Insect Pest Control Subprogramme, Department of Nuclear Sciences and Applications, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, 1400 Vienna, Austria
| | - Aaron Lloyd
- Lee County Mosquito Control District, 15191 Homestead Road, Lehigh Acres, FL 33971 USA
| | - David Hoel
- Lee County Mosquito Control District, 15191 Homestead Road, Lehigh Acres, FL 33971 USA
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Balestrino F, Puggioli A, Malfacini M, Albieri A, Carrieri M, Bouyer J, Bellini R. Field Performance Assessment of Irradiated Aedes albopictus Males Through Mark–Release–Recapture Trials With Multiple Release Points. Front Bioeng Biotechnol 2022; 10:876677. [PMID: 35928955 PMCID: PMC9344911 DOI: 10.3389/fbioe.2022.876677] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/30/2022] [Indexed: 11/21/2022] Open
Abstract
Mark–release–recapture (MRR) trials have been conducted in Northern Italy to evaluate the capacity of radio-substerilized Aedes albopictus males to survive, disperse, and engage in mating in the field. Two MRR sessions with the human landing collection method (HLC) were conducted with the simultaneous release of irradiated males marked with four different pigment colors. The survival and dispersal rates seem to be influenced more by environmental factors such as barriers, shading, and vegetation rather than weather parameters. In this study, we confirmed a positive linear relationship between the sterile adult male’s daily survival rate and the relative humidity previously reported in similar experimental conditions and a different dispersal capacity of the released A. albopictus males in low- (NDVI index <0.4) and high (NDVI index >0.4)-vegetated areas. Consistent with previous studies, A. albopictus males have their maximal dispersion in the first days after release, while in the following days the males become more stationary. The similar field performances obtained with marked and unmarked radio-sterilized and untreated A. albopictus males on similar environments confirm the negligible effects of irradiation and marking procedures on the quality of the males released. The similar sterile to wild (S/W) male ratio measured in high- and low-vegetation areas in the release sites indicates a similar distribution pattern for the wild and the released sterile males. According to the MRR data collected, the Lincoln index estimated different A. albopictus mean population densities in the study areas equal to 7,000 and 3,000 male/ha, respectively.
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Affiliation(s)
- Fabrizio Balestrino
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
- *Correspondence: Fabrizio Balestrino,
| | - Arianna Puggioli
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
| | - Marco Malfacini
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
| | - Alessandro Albieri
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
| | - Marco Carrieri
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
| | - Jeremy Bouyer
- FAO/IAEA Insect Pest Control Laboratory (IPCL), FAO/IAEA Agriculture and Biotechnology Laboratories, FAO/IAEA Joint Division of Nuclear Techniques in Food and Agriculture (NAFA), Vienna, Austria
- CIRAD, UMR ASTRE CIRAD-INRA, Animal, Health, Territories, Risks and Ecosystems, Montpellier, France
| | - Romeo Bellini
- Centro Agricoltura Ambiente “G. Nicoli”, Sanitary Entomology and Zoology Department, Crevalcore, Italy
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Kaiser ML, Wood OR, Damiens D, Brooke BD, Koekemoer LL, Munhenga G. Estimates of the population size and dispersal range of Anopheles arabiensis in Northern KwaZulu-Natal, South Africa: implications for a planned pilot programme to release sterile male mosquitoes. Parasit Vectors 2021; 14:205. [PMID: 33874984 PMCID: PMC8056555 DOI: 10.1186/s13071-021-04674-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/07/2021] [Indexed: 11/20/2022] Open
Abstract
Background Anopheles arabiensis is a major malaria vector, recently implicated as contributing to ongoing residual malaria transmission in South Africa, which feeds and rests both indoors and outdoors. This species is, therefore, not effectively targeted using core malaria vector control interventions alone. Additionally, increasing resistance to available insecticides necessitates investigations into complementary non-insecticide-based vector control methods for outdoor-resting mosquitoes. The feasibility of the sterile insect technique (SIT) as a complementary vector control intervention is being investigated in South Africa. Successful implementation of an SIT programme largely depends on inundating a target insect population with sterilized laboratory-bred males. Therefore, knowledge of the native population size and dispersal ability of released sterile laboratory-reared males is critical. In this study, we estimated the male An. arabiensis population size and the dispersal of released males in an area targeted for a pilot sterile male release programme. Methods Three separate releases were performed within a 2-year period. Approximately 5000–15,000 laboratory-reared male An. arabiensis (KWAG) were produced and marked for mark–release–recapture experiments. To recapture released mosquitoes, cloth tubes were deployed in widening concentric circles. The average dispersal distance of released males was calculated and the wild male An. arabiensis population size was estimated using two Lincoln index formulae. The natural population was sampled concurrently and Anopheles species diversity examined. Results The Anopheles gambiae complex and An. funestus group species made up the majority of wild collections along with other anophelines. The An. arabiensis population size was estimated to be between 550 and 9500 males per hectare depending on time of year, weather conditions and method used. Average dispersal distance of marked males ranged from 58 to 86 m. Marked males were found in swarms with wild males, indicating that laboratory-reared males are able to locate and participate in mating swarms. Conclusions It was logistically feasible to conduct mark–release–recapture studies at the current scale. The population size estimates obtained may provide a guideline for the initial number of males to use for a pending SIT pilot trial. It is promising for future SIT trials that laboratory-reared marked males participated in natural swarms, appearing at the right place at the right time. ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-021-04674-w.
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Affiliation(s)
- Maria L Kaiser
- Centre for Emerging Zoonotic & Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa. .,Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
| | - Oliver R Wood
- Centre for Emerging Zoonotic & Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.,Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - David Damiens
- UMR IRD 224, Maladies Infectieuses et Vecteurs-Ecologie-Génétique, Evolution et Contrôle (MIVEGEC), Institut de Recherche Pour Le Développement (IRD) CNRS 5290-Université de Montpellier, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - Basil D Brooke
- Centre for Emerging Zoonotic & Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.,Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Lizette L Koekemoer
- Centre for Emerging Zoonotic & Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.,Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Givemore Munhenga
- Centre for Emerging Zoonotic & Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.,Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Oliva CF, Benedict MQ, Collins CM, Baldet T, Bellini R, Bossin H, Bouyer J, Corbel V, Facchinelli L, Fouque F, Geier M, Michaelakis A, Roiz D, Simard F, Tur C, Gouagna LC. Sterile Insect Technique (SIT) against Aedes Species Mosquitoes: A Roadmap and Good Practice Framework for Designing, Implementing and Evaluating Pilot Field Trials. INSECTS 2021; 12:191. [PMID: 33668374 PMCID: PMC7996155 DOI: 10.3390/insects12030191] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/16/2021] [Accepted: 02/20/2021] [Indexed: 12/20/2022]
Abstract
Aedes albopictus and Aedes aegypti are invasive mosquito species that impose a substantial risk to human health. To control the abundance and spread of these arboviral pathogen vectors, the sterile insect technique (SIT) is emerging as a powerful complement to most commonly-used approaches, in part, because this technique is ecologically benign, specific, and non-persistent in the environment if releases are stopped. Because SIT and other similar vector control strategies are becoming of increasing interest to many countries, we offer here a pragmatic and accessible 'roadmap' for the pre-pilot and pilot phases to guide any interested party. This will support stakeholders, non-specialist scientists, implementers, and decision-makers. Applying these concepts will ensure, given adequate resources, a sound basis for local field trialing and for developing experience with the technique in readiness for potential operational deployment. This synthesis is based on the available literature, in addition to the experience and current knowledge of the expert contributing authors in this field. We describe a typical path to successful pilot testing, with the four concurrent development streams of Laboratory, Field, Stakeholder Relations, and the Business and Compliance Case. We provide a graphic framework with criteria that must be met in order to proceed.
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Affiliation(s)
- Clélia F. Oliva
- Centre Technique Interprofessionnel des Fruits et Légumes (CTIFL), Centre Opérationnel de Balandran, 751 Chemin de Balandran, 30127 Bellegarde, France;
- Collectif TIS (Technique de l’Insecte Stérile), 751 Chemin de Balandran, 30127 Bellegarde, France
| | | | - C Matilda Collins
- Centre for Environmental Policy, Imperial College London, London SW7 1NE, UK;
| | - Thierry Baldet
- ASTRE (Animal, Santé, Territoires, Risques, Ecosystèmes), Cirad, Univ Montpellier, 34398 Montpellier, France; (T.B.); (J.B.)
| | - Romeo Bellini
- Centro Agricoltura Ambiente “Giorgio Nicoli”, S.r.l. Via Sant’Agata, 835, 40014 Crevalcore, Italy;
| | - Hervé Bossin
- Institut Louis Malardé, Papeete, 98713 Tahiti, French Polynesia;
| | - Jérémy Bouyer
- ASTRE (Animal, Santé, Territoires, Risques, Ecosystèmes), Cirad, Univ Montpellier, 34398 Montpellier, France; (T.B.); (J.B.)
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, IAEA Vienna, Wagramer Strasse 5, 1400 Vienna, Austria
| | - Vincent Corbel
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 34394 Montpellier, France; (V.C.); (D.R.); (F.S.)
| | - Luca Facchinelli
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK;
| | - Florence Fouque
- TDR (Special Programme for Research and Training in Tropical Diseases), WHO, 20 Avenue Appia, 1121 Geneva, Switzerland;
| | - Martin Geier
- Biogents AG, Weissenburgstr. 22, 93055 Regensburg, Germany;
| | - Antonios Michaelakis
- Benaki Phytopathological Institute. 8, S. Delta str., Kifissia, 14561 Athens, Greece;
| | - David Roiz
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 34394 Montpellier, France; (V.C.); (D.R.); (F.S.)
| | - Frédéric Simard
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 34394 Montpellier, France; (V.C.); (D.R.); (F.S.)
| | - Carlos Tur
- Grupo Tragsa–KM. 4,5 Bajo, A28476208-EMPRE, Moncada, 46113 Valencia, Spain;
| | - Louis-Clément Gouagna
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 34394 Montpellier, France; (V.C.); (D.R.); (F.S.)
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Gouagna LC, Damiens D, Oliva CF, Boyer S, Le Goff G, Brengues C, Dehecq JS, Raude J, Simard F, Fontenille D. Strategic Approach, Advances, and Challenges in the Development and Application of the SIT for Area-Wide Control of Aedes albopictus Mosquitoes in Reunion Island. INSECTS 2020; 11:insects11110770. [PMID: 33171885 PMCID: PMC7695178 DOI: 10.3390/insects11110770] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/27/2020] [Accepted: 11/05/2020] [Indexed: 12/20/2022]
Abstract
Simple Summary Aedes albopictus is a well-established competent arbovirus vector in Reunion Island, a French overseas territory in the Indian Ocean, occurring in a range of natural to urban environments where it represents a major threat to public health. Following the 2006 Chikungunya outbreak and periodic occurrence of dengue epidemics, the sterile insect technique (SIT) emerged as the most environment-friendly option for integration with the current vector control strategy that relies mainly on the elimination of breeding sites and insecticide applications. This paper describes the trajectory that has been followed in assessing the feasibility of SIT against Ae. albopictus in Reunion Island, and reviews some of the main achievements since 2009. These include essential scientific information so far obtained on the biology and ecology of Ae. albopictus, and the development of the requisite technological capabilities for the production and release of sexually competitive sterile males. Furthermore, it also draws attention to the strategies established to streamline the decision-making process, including an awareness campaign to enhance public understanding, efforts to secure public acceptance and regulatory validation of SIT pilot testing for small-scale suppression of wild Ae. albopictus in selected urban sites on the island. Abstract The global expansion of Aedes albopictus, together with the absence of specific treatment and vaccines for most of the arboviruses it transmits, has stimulated the development of more sustainable and ecologically acceptable methods for control of disease transmission through the suppression of natural vector populations. The sterile insect technique (SIT) is rapidly evolving as an additional tool for mosquito control, offering an efficient and more environment-friendly alternative to the use of insecticides. Following the devastating chikungunya outbreak, which affected 38% of the population on Reunion Island (a French overseas territory in the southwest of the Indian Ocean), there has been strong interest and political will to develop effective alternatives to the existing vector control strategies. Over the past 10 years, the French Research and Development Institute (IRD) has established an SIT feasibility program against Ae. albopictus on Reunion Island in collaboration with national and international partners. This program aimed to determine whether the SIT based on the release of radiation-sterilized males is scientifically and technically feasible, and socially acceptable as part of a control strategy targeting the local Ae. albopictus population. This paper provides a review of a multi-year and a particularly broad scoping process of establishing the scientific and technological feasibility of the SIT against Ae. albopictus on Reunion Island. It also draws attention to some prerequisites of the decision-making process, through awareness campaigns to enhance public understanding and support, social adoption, and regulatory validation of the SIT pilot tests.
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Affiliation(s)
- Louis Clément Gouagna
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
- Correspondence: ; Tel.: +33-2-62-93-88-19
| | - David Damiens
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Clélia F. Oliva
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Sébastien Boyer
- Medical and Veterinary Entomology Unit, Institut Pasteur du Cambodge, Phnom Penh 12201, Cambodia;
| | - Gilbert Le Goff
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Cécile Brengues
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Jean-Sébastien Dehecq
- ARS—Délégation Départementale de la Haute-Garonne, Pôle de Prévention et Gestion des Alertes Sanitaires, CEDEX 2, 31050 Toulouse, France;
| | - Jocelyn Raude
- EHESP, School of Public Health, UMR “Emergence des Pathologies Virales”, Université Aix-Marseille, IRD190, INSERM1207, 35043 Rennes, France;
| | - Frédéric Simard
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Didier Fontenille
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
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9
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Wang JN, Hou J, Zhong JY, Cao GP, Yu ZY, Wu YY, Li TQ, Liu QM, Gong ZY. Relationships between traditional larval indices and meteorological factors with the adult density of Aedes albopictus captured by BG-mosquito trap. PLoS One 2020; 15:e0234555. [PMID: 32525905 PMCID: PMC7289416 DOI: 10.1371/journal.pone.0234555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 05/28/2020] [Indexed: 12/02/2022] Open
Abstract
Objectives Larval indices have been used for Ae. albopictus surveillance for many years, while there is limited use in assessing dengue transmission risk and adult mosquito emergence. This study is aimed to explore the relationships between larval indices and the Ae. albopictus density captured by BG-mosquito trap (BG-trap) method, with considering the meteorological factors. Methods Data on larval density, adult mosquito density and meteorology factors were collected in an entomological survey carried out in Quzhou City, Zhejiang Province of China in 2018. The Spearman’s rank correlation and Pearson correlation were used for the analysis on the correlation of density indices. Generalized additive models were established to analyze the influencing factors of mosquito density. Results Breteau index (BI), House index (HI) and Container index (CI) were highly correlated with each other (r>0.7, p<0.05). The Ae. albopictus density was significantly correlated with CI (rs = 0.260, p<0.05), CI pre one week (rs = 0.259, p<0.05), and CI pre three weeks (rs = 0.329, p<0.05). BI was correlated with female Ae. albopictus density pre 4 weeks (r = -0.299, p<0.05). Female Ae. albopictus density was correlated with CI pre 3 weeks (rs = 0.303, p<0.05). The influencing factors of BI were average wind speed pre 1 week, average temperature and female Ae. albopictus density pre 4 weeks. The influencing factors of CI were average humidity pre 3 weeks and average temperature. The influencing factors of HI were average temperature and precipitation pre 4 weeks. The influencing factor of Ae. albopictus density and female Ae. albopictus density was temperature. Conclusions The adult Ae. albopictus density had low correlation with certain larval indices. Some of the meteorology factors played significant roles in the density of adult Ae. albopictus and larva with or without a time lag.
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Affiliation(s)
- Jin-Na Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Juan Hou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Jian-Yue Zhong
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Guo-Ping Cao
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Zhang-You Yu
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Yu-Yan Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Tian-Qi Li
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Qin-Mei Liu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Zhen-Yu Gong
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
- * E-mail:
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10
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Rat volatiles as an attractant source for the Asian tiger mosquito, Aedes albopictus. Sci Rep 2020; 10:5170. [PMID: 32198359 PMCID: PMC7083917 DOI: 10.1038/s41598-020-61925-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/02/2020] [Indexed: 11/21/2022] Open
Abstract
Aedes albopictus is a vector of dengue, chikungunya, and dirofilariasis. Volatile compounds are crucial for mosquitoes to locate their hosts. This knowledge has allowed the identification of attractants derived from human odours for highly anthropophilic mosquito species. In this study, we used rats as a experimental model to identify potential attractants for host-seeking Ae. albopictus females. Porapak Q extracts from immature female rats were more attractive to Ae. albopictus females than those from mature and pregnant females, and males. Phenol, 4-methylphenol, 4-ethylphenol, and indole were identified compounds in male, immature, mature, and pregnant female extracts. There were quantitative differences in these compounds among the extracts that likely explain the discrepancy in their attractiveness. Ae. albopictus females were not attracted to the single compounds when was compared with the four-component blend. However, the binary blend of 4-methylphenol + 4-ethylphenol and the tertiary blend of 4-methylphenol + 4-ethylphenol + indole were as attractive as the four-component blend. In the field trials, BGS traps baited with the tertiary or quaternary blends caught more Ae. albopictus females and males than BGS traps without lures. This is the first laboratory and field study to identify compounds that mediate the attraction of Ae. albopictus to one of its hosts.
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11
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Clymans R, Van Kerckvoorde V, Beliën T, Bylemans D, De Clercq P. Marking Drosophila suzukii (Diptera: Drosophilidae) with Fluorescent Dusts. INSECTS 2020; 11:E152. [PMID: 32121497 PMCID: PMC7143264 DOI: 10.3390/insects11030152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 11/17/2022]
Abstract
The marking of Drosophila suzukii can be an important instrument for studying the ecology and behaviour of this economically important fruit pest, aiding the development of new Integrated Pest Management (IPM) tools or strategies. There is, however, a need for a cost-effective methodology that provides an easily detectable and stable mark. Whereas fluorescent pigment powders are often used in entomological research, the pigments (series, dyes), application techniques, or doses need to be evaluated for each studied species in terms of their efficacy and possible adverse effects on the performance of the insect. The effectiveness of different application techniques and dyes (RadGlo® TP-series) and their effect on the survival of adult D. suzukii were investigated in the laboratory. Furthermore, the influence of the marking on the behaviour of the flies was examined in laboratory trap assays (olfaction) and a field recapture study (general orientation). The persistence and detectability of the marks was evaluated both on living flies (for different application techniques) and dead flies under trapping/storage conditions. The use of fluorescent powders to mark D. suzukii flies yielded a clearly detectable and highly persistent mark, without any adverse effects on the survival and behaviour of the flies.
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Affiliation(s)
- Rik Clymans
- Zoology Department, Research Centre for Fruit Cultivation (pcfruit npo), Fruittuinweg 1, B-3800 Sint-Truiden, Belgium
- Department of Biosystems, KU Leuven, Decroylaan 42, B-3001 Heverlee, Belgium
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Vincent Van Kerckvoorde
- Zoology Department, Research Centre for Fruit Cultivation (pcfruit npo), Fruittuinweg 1, B-3800 Sint-Truiden, Belgium
| | - Tim Beliën
- Zoology Department, Research Centre for Fruit Cultivation (pcfruit npo), Fruittuinweg 1, B-3800 Sint-Truiden, Belgium
| | - Dany Bylemans
- Zoology Department, Research Centre for Fruit Cultivation (pcfruit npo), Fruittuinweg 1, B-3800 Sint-Truiden, Belgium
- Department of Biosystems, KU Leuven, Decroylaan 42, B-3001 Heverlee, Belgium
| | - Patrick De Clercq
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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12
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Tran A, Mangeas M, Demarchi M, Roux E, Degenne P, Haramboure M, Le Goff G, Damiens D, Gouagna LC, Herbreteau V, Dehecq JS. Complementarity of empirical and process-based approaches to modelling mosquito population dynamics with Aedes albopictus as an example-Application to the development of an operational mapping tool of vector populations. PLoS One 2020; 15:e0227407. [PMID: 31951601 PMCID: PMC6968851 DOI: 10.1371/journal.pone.0227407] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 12/18/2019] [Indexed: 01/05/2023] Open
Abstract
Mosquitoes are responsible for the transmission of major pathogens worldwide. Modelling their population dynamics and mapping their distribution can contribute effectively to disease surveillance and control systems. Two main approaches are classically used to understand and predict mosquito abundance in space and time, namely empirical (or statistical) and process-based models. In this work, we used both approaches to model the population dynamics in Reunion Island of the 'Tiger mosquito', Aedes albopictus, a vector of dengue and chikungunya viruses, using rainfall and temperature data. We aimed to i) evaluate and compare the two types of models, and ii) develop an operational tool that could be used by public health authorities and vector control services. Our results showed that Ae. albopictus dynamics in Reunion Island are driven by both rainfall and temperature with a non-linear relationship. The predictions of the two approaches were consistent with the observed abundances of Ae. albopictus aquatic stages. An operational tool with a user-friendly interface was developed, allowing the creation of maps of Ae. albopictus densities over the whole territory using meteorological data collected from a network of weather stations. It is now routinely used by the services in charge of vector control in Reunion Island.
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Affiliation(s)
- Annelise Tran
- CIRAD, UMR TETIS, Sainte-Clotilde, Reunion, France
- TETIS, Univ Montpellier, AgroParisTech, CIRAD, CNRS, INRAE, Montpellier, France
- CIRAD, UMR ASTRE, Sainte-Clotilde, Reunion, France
- ASTRE, Univ Montpellier, CIRAD, INRAE, Montpellier, France
- * E-mail:
| | | | | | | | - Pascal Degenne
- CIRAD, UMR TETIS, Sainte-Clotilde, Reunion, France
- TETIS, Univ Montpellier, AgroParisTech, CIRAD, CNRS, INRAE, Montpellier, France
| | - Marion Haramboure
- CIRAD, UMR TETIS, Sainte-Clotilde, Reunion, France
- TETIS, Univ Montpellier, AgroParisTech, CIRAD, CNRS, INRAE, Montpellier, France
- CIRAD, UMR ASTRE, Sainte-Clotilde, Reunion, France
- ASTRE, Univ Montpellier, CIRAD, INRAE, Montpellier, France
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13
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Vavassori L, Saddler A, Müller P. Active dispersal of Aedes albopictus: a mark-release-recapture study using self-marking units. Parasit Vectors 2019; 12:583. [PMID: 31831040 PMCID: PMC6909613 DOI: 10.1186/s13071-019-3837-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 12/03/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Understanding the dispersal dynamics of invasive mosquito species is fundamental to improve vector surveillance and to target control efforts. Aedes albopictus has been deemed a poor flyer as its range of active dispersal is generally assumed to be limited to a few hundred metres, while laboratory studies suggest this mosquito could actually fly several kilometres. The discrepancy may be due to differences in the local environment or to the methodological approach. In Switzerland, Ae. albopictus has been present since 2003 and has since then expanded its range. While passive dispersal is a key driver, it remains unclear how far this mosquito spreads through active flight and what the age structure and size of the local population are, all important parameters for vector surveillance and control. METHOD We investigated the active dispersal, daily survival rate and population size of Ae. albopictus in mark-release-recapture studies in Coldrerio and Lugano, two areas of intensive control in Switzerland. To mark mosquitoes emerging from breeding sites, we used self-marking units with fluorescent pigment that have minimal impact on mosquito survival and behaviour. We recaptured the adult mosquitoes with BG-Sentinel traps within a radius of 1 km from the marking units over 22 consecutive days. RESULTS We found that 77.5% of the recaptured Ae. albopictus individuals flew further than 250 m, the limit that is usually deemed sufficient for vector containment. The average age of females and males was 8.6 days and 7.8 days in Coldrerio and Lugano, respectively, while the estimated mosquito population densities were 134 mosquitoes/ha in Coldrerio and 767 mosquitoes/ha in Lugano. CONCLUSIONS Self-marking units are an effective tool to mark wild mosquitoes. Using this approach, we found that mosquitoes survive long enough to potentially transmit arboviral disease in our study area and that host-seeking Ae. albopictus females may travel further than previously assumed for European mosquito populations. This finding has direct implications for vector control as emergency treatments around positive cases, as well as surveillance and control around detections of new infestations, might need to be extended beyond the usual recommended range of just a few hundred metres.
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Affiliation(s)
- Laura Vavassori
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland. .,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland.
| | - Adam Saddler
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland.,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland.,Ifakara Health Institute, Environmental Health and Ecological Sciences, P.O. Box 74, Bagamoyo, Tanzania
| | - Pie Müller
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland.,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland
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14
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Damiens D, Marquereau L, Lebon C, Le Goff G, Gaudillat B, Habchi-Hanriot N, Gouagna LC. Aedes albopictus Adult Medium Mass Rearing for SIT Program Development. INSECTS 2019; 10:insects10080246. [PMID: 31405080 PMCID: PMC6723893 DOI: 10.3390/insects10080246] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/03/2019] [Accepted: 07/03/2019] [Indexed: 11/16/2022]
Abstract
For the production of several hundred thousands of Aedes albopictus sterile males for the implementation of a Sterile Insect Technique (SIT) program, no costly mass-rearing equipment is needed during the initial phases, as optimized rearing at laboratory scale can be sufficient for the first steps. The aim of this study was to maximize the egg production by optimizing adult rearing methods for Ae. albopictus. The effect of parameters such as male/female ratio, density of adults, membrane type for blood feeding, quantity of blood delivered, continuous or discontinuous blood feeding, and surface of substrates for egg laying on overall egg production was tested to find optimized conditions. Based on the number of eggs produced per cage in response to the parameters tested, the optimum cage set-up was seen to be 1500 adults in a 30 × 30 × 30 cm cage with a male/female sex ratio of 1:3, fed by fresh bovine blood for periods of 30 min using a cellulose membrane covering a 10 cm stainless steel plate heated by a Hemotek device, and the provision of five oviposition cups to collect eggs. With this set-up, production per cage can reach a maximum of 35,000 eggs per week.
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Affiliation(s)
- David Damiens
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France.
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France.
| | - Lucie Marquereau
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
| | - Cyrille Lebon
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
| | - Gilbert Le Goff
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
| | - Benjamin Gaudillat
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
| | - Nausicaa Habchi-Hanriot
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
| | - Louis-Clément Gouagna
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/Université de Montpellier), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, 34394 Montpellier, France
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), 97491 Sainte Clotilde, Reunion Island, France
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Manica M, Caputo B, Screti A, Filipponi F, Rosà R, Solimini A, della Torre A, Blangiardo M. Applying the N‐mixture model approach to estimate mosquito population absolute abundance from monitoring data. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mattia Manica
- Department of Biodiversity and Molecular Ecology, Research and Innovation Centre Fondazione Edmund Mach San Michele all'Adige Italy
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Beniamino Caputo
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Alessia Screti
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Federico Filipponi
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Roberto Rosà
- Department of Biodiversity and Molecular Ecology, Research and Innovation Centre Fondazione Edmund Mach San Michele all'Adige Italy
- Center Agriculture Food Environment University of Trento San Michele all'Adige Italy
| | - Angelo Solimini
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Alessandra della Torre
- Dipartimento di Sanità Pubblica e Malattie Infettive, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti Sapienza University of Rome Rome Italy
| | - Marta Blangiardo
- MRC Centre for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine Imperial College London London UK
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Bliman PA, Cardona-Salgado D, Dumont Y, Vasilieva O. Implementation of control strategies for sterile insect techniques. Math Biosci 2019; 314:43-60. [PMID: 31176705 DOI: 10.1016/j.mbs.2019.06.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 06/05/2019] [Accepted: 06/05/2019] [Indexed: 10/26/2022]
Abstract
In this paper, we propose a sex-structured entomological model that serves as a basis for design of control strategies relying on releases of sterile male mosquitoes (Aedes spp) and aiming at elimination of the wild vector population in some target locality. We consider different types of releases (constant and periodic impulsive), providing sufficient conditions to reach elimination. However, the main part of the paper is focused on the study of the periodic impulsive control in different situations. When the size of wild mosquito population cannot be assessed in real time, we propose the so-called open-loop control strategy that relies on periodic impulsive releases of sterile males with constant release size. Under this control mode, global convergence towards the mosquito-free equilibrium is proved on the grounds of sufficient condition that relates the size and frequency of releases. If periodic assessments (either synchronized with the releases or more sparse) of the wild population size are available in real time, we propose the so-called closed-loop control strategy, under which the release size is adjusted in accordance with the wild population size estimate. Finally, we propose a mixed control strategy that combines open-loop and closed-loop strategies. This control mode renders the best result, in terms of overall time needed to reach elimination and the number of releases to be effectively carried out during the whole release campaign, while requiring for a reasonable amount of released sterile insects.
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Affiliation(s)
- Pierre-Alexandre Bliman
- Sorbonne Université, Université Paris-Diderot SPC, Inria, CNRS, Laboratoire Jacques-Louis Lions, équipe Mamba, Paris, France.
| | | | - Yves Dumont
- CIRAD, Umr AMAP, Pretoria, South Africa; AMAP, Univ Montpellier, CIRAD, CNRS, INRA, IRD, Montpellier, France; University of Pretoria, Department of Mathematics and Applied Mathematics, South Africa.
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Spatial Modeling of Mosquito Vectors for Rift Valley Fever Virus in Northern Senegal: Integrating Satellite-Derived Meteorological Estimates in Population Dynamics Models. REMOTE SENSING 2019. [DOI: 10.3390/rs11091024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Mosquitoes are vectors of major pathogen agents worldwide. Population dynamics models are useful tools to understand and predict mosquito abundances in space and time. To be used as forecasting tools over large areas, such models could benefit from integrating remote sensing data that describe the meteorological and environmental conditions driving mosquito population dynamics. The main objective of this study is to assess a process-based modeling framework for mosquito population dynamics using satellite-derived meteorological estimates as input variables. A generic weather-driven model of mosquito population dynamics was applied to Rift Valley fever vector species in northern Senegal, with rainfall, temperature, and humidity as inputs. The model outputs using meteorological data from ground weather station vs satellite-based estimates are compared, using longitudinal mosquito trapping data for validation at local scale in three different ecosystems. Model predictions were consistent with field entomological data on adult abundance, with a better fit between predicted and observed abundances for the Sahelian Ferlo ecosystem, and for the models using in-situ weather data as input. Based on satellite-derived rainfall and temperature data, dynamic maps of three potential Rift Valley fever vector species were then produced at regional scale on a weekly basis. When direct weather measurements are sparse, these resulting maps should be used to support policy-makers in optimizing surveillance and control interventions of Rift Valley fever in Senegal.
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Le Goff G, Damiens D, Ruttee AH, Payet L, Lebon C, Dehecq JS, Gouagna LC. Field evaluation of seasonal trends in relative population sizes and dispersal pattern of Aedes albopictus males in support of the design of a sterile male release strategy. Parasit Vectors 2019; 12:81. [PMID: 30755268 PMCID: PMC6371565 DOI: 10.1186/s13071-019-3329-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/29/2019] [Indexed: 01/25/2023] Open
Abstract
Background To develop an efficient sterile insect technique (SIT) programme, the number of sterile males to release, along with the spatial and temporal pattern of their release, has to be determined. Such parameters could be estimated from a reliable estimation of the wild population density (and its temporal variation) in the area to treat. Here, a series of mark-release-recapture experiments using laboratory-reared and field-derived Aedes albopictus males were carried out in Duparc, a selected pilot site for the future application of SIT in the north of La Reunion Island. Methods The dispersal, longevity of marked males and seasonal fluctuations in the population size of native mosquitoes were determined from the ratio of marked to unmarked males caught in mice-baited BG-Sentinel traps. The study was conducted during periods of declining population abundance (April), lowest abundance (September) and highest abundance (December). Results According to data collected in the first 4 days post-release, the Lincoln index estimated population size as quite variable, ranging from 5817 in April, to 639 in September and 5915 in December. Calculations of daily survival probability to 4 days after release for field and laboratory males were 0.91 and 0.98 in April, respectively, and 0.88 and 0.84 in September, respectively. The mean distance travelled (MDT) of released field males were 46 m, 67 m and 37 m for December, April and September experiments, respectively. For released laboratory males, the MDT was 65 m and 42 m in April and September, respectively. Conclusions Theoretically, the most efficient release programme should be started in July/August when the mosquito population size is the lowest (c.600 wild males/ha relative to 5000 wild males estimated for December and April), with a weekly release of 6000 males/ha. The limited dispersal of Ae. albopictus males highlights the nessecity for the widespread release of sterile males over multiple sites and in a field setting to avoid topographical barriers and anthropogenic features that may block the migration of the released sterile male mosquitoes. Electronic supplementary material The online version of this article (10.1186/s13071-019-3329-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gilbert Le Goff
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM): Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - David Damiens
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM): Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, Montpellier, France. .,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France.
| | - Abdoul-Hamid Ruttee
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Laurent Payet
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Cyrille Lebon
- IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - Jean-Sébastien Dehecq
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Louis-Clément Gouagna
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM): Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
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Lebon C, Soupapoule K, Wilkinson DA, Le Goff G, Damiens D, Gouagna LC. Laboratory evaluation of the effects of sterilizing doses of γ-rays from Caesium-137 source on the daily flight activity and flight performance of Aedes albopictus males. PLoS One 2018; 13:e0202236. [PMID: 30107004 PMCID: PMC6091941 DOI: 10.1371/journal.pone.0202236] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/30/2018] [Indexed: 12/17/2022] Open
Abstract
The control of Aedes albopictus through Sterile Male Releases requires that the most competitive males be mass-reared and sterilized usually with gamma- or X-ray radiation prior to release. Developing an understanding of the impact of irradiation treatment on flight performance in sterile males is very important because any fitness cost may reduce the efficacy of SIT intervention in the field. Here, we examined the role of irradiation exposure and sugar-feeding on daily flight activity and performance of Ae. albopictus males sterilized during pupal stage with gamma-radiation at 35Gray from a Caesium 137 source. We used a previously developed automated video tracking system to monitor the flight activity of different groups of sterile and control non-sterile males over 24 hours in a flight arena. This monitoring took place under controlled laboratory conditions and we wished to quantify the daily flight activity and to highlight any changes due to radiation treatment and nutritional conditions (starved versus sugar fed). Our experimental evidence demonstrated a characteristic diurnal flight activity with a bimodal pattern regardless of the treatment. Precisely, both irradiated and non-irradiated males exhibited two distinct peaks in flight activity in the morning (6-8 a.m.) and late afternoon (4-6 p.m.). Under changing physiological conditions, irradiated males were generally more active over time and flew longer overall distances than control male populations. These results suggest some internal circadian control of the phase relation to the light-dark cycle, with evidence for modification of flight performance by nutritional status. The fact that daily activity patterns are alike in irradiated and control Ae. albopictus males, and that sterile males could display higher flight performance, is in contrast with the hypothesis that irradiation treatment appears to reduce the fitness of male mosquitoes. We discuss the implications of the present study in sterile-male release programs against Ae. albopictus.
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Affiliation(s)
- Cyrille Lebon
- Institut de Recherche pour le Développement (IRD, Unité Mixte de Recherche « Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle » MIVEGEC (IRD 224-CNRS 5290-UM1-UM2), Montpellier, France
- IRD La Réunion / GIP CYROI (Recherche Santé Bio-innovation), Sainte-Clotilde, La Réunion Island, France
| | - Kevin Soupapoule
- Université de La Rochelle–UFR Sciences—Département de Biotechnologies, La Rochelle, France
| | - David A. Wilkinson
- Université de La Réunion, Unité Mixte de Recherche « Processus Infectieux en Milieu Insulaire Tropical (UMR PIMIT)», INSERM U1187-CNRS9192-IRD249. Plateforme de Recherche CYROI, Ste Clotilde, La Réunion Island, France
| | - Gilbert Le Goff
- Institut de Recherche pour le Développement (IRD, Unité Mixte de Recherche « Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle » MIVEGEC (IRD 224-CNRS 5290-UM1-UM2), Montpellier, France
- IRD La Réunion / GIP CYROI (Recherche Santé Bio-innovation), Sainte-Clotilde, La Réunion Island, France
| | - David Damiens
- Institut de Recherche pour le Développement (IRD, Unité Mixte de Recherche « Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle » MIVEGEC (IRD 224-CNRS 5290-UM1-UM2), Montpellier, France
- IRD La Réunion / GIP CYROI (Recherche Santé Bio-innovation), Sainte-Clotilde, La Réunion Island, France
| | - Louis Clément Gouagna
- Institut de Recherche pour le Développement (IRD, Unité Mixte de Recherche « Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle » MIVEGEC (IRD 224-CNRS 5290-UM1-UM2), Montpellier, France
- IRD La Réunion / GIP CYROI (Recherche Santé Bio-innovation), Sainte-Clotilde, La Réunion Island, France
- * E-mail:
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Van der Stocken T, Vanschoenwinkel B, De Ryck D, Koedam N. Caught in transit: offshore interception of seafaring propagules from seven mangrove species. Ecosphere 2018. [DOI: 10.1002/ecs2.2208] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Tom Van der Stocken
- Department of Biology Vrije Universiteit Brussel Pleinlaan 2 B‐1050 Brussels Belgium
| | - Bram Vanschoenwinkel
- Department of Biology Vrije Universiteit Brussel Pleinlaan 2 B‐1050 Brussels Belgium
| | - Dennis De Ryck
- Department of Biology Vrije Universiteit Brussel Pleinlaan 2 B‐1050 Brussels Belgium
| | - Nico Koedam
- Department of Biology Vrije Universiteit Brussel Pleinlaan 2 B‐1050 Brussels Belgium
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Comparison of Efficiency of BG-Sentinel Traps Baited with Mice, Mouse-Litter, and CO₂ Lures for Field Sampling of Male and Female Aedes albopictus Mosquitoes. INSECTS 2017; 8:insects8030095. [PMID: 28862681 PMCID: PMC5620715 DOI: 10.3390/insects8030095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/28/2017] [Accepted: 08/28/2017] [Indexed: 12/27/2022]
Abstract
Determining the abundance and distribution of male mosquitoes in the wild and establishing species seasonality in candidate pilot sites is of particular interest with respect to the use of the sterile-male technique. With the knowledge that using mice as bait in BG-Sentinel traps effectively enhances Aedes albopictus male and female trapping success, the present study was designed to determine whether attractants derived from mouse odour blend could be a viable substitute for live mice to lure Ae. albopictus mosquitoes into traps. The effects of baiting BG-Sentinel traps with mice, carbon dioxide (CO2), and attractants derived from litter mouse odours (mouse litter (ML)) and a mouse odour blend (MOB) on the efficiency of trapping Ae. albopictus males and females were tested using a Latin square design. The BG-Sentinel trap baited with CO2 + ML caught a significantly larger number of mosquitoes compared to traps baited with mice only. The BG-Sentinel traps containing only CO2 or CO2 + MOB, however, did not catch significantly more mosquitoes compared to the other traps. The proportions of males caught in the BG-Sentinel traps did not differ significantly between the respective attractants. The results from this study confirm that CO2 bait is efficient to provide a reliable estimation method for Ae. albopictus adult male abundance in the wild, and suggest that mouse litter baits in combination with CO2 could be used to enhance Aedes trapping success in BG-Sentinel traps.
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Le Goff G, Damiens D, Payet L, Ruttee AH, Jean F, Lebon C, Dehecq JS, Gouagna LC. Enhancement of the BG-sentinel trap with varying number of mice for field sampling of male and female Aedes albopictus mosquitoes. Parasit Vectors 2016; 9:514. [PMID: 27658455 PMCID: PMC5034657 DOI: 10.1186/s13071-016-1801-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 09/14/2016] [Indexed: 12/27/2022] Open
Abstract
Background Trapping male mosquitoes in the field is essential for the development of area-wide vector control programs with a sterile insect technique (SIT) component. To determine the optimal temporal and spatial release strategy, an estimation of the wild population density and its temporal dynamics is essential. Among the traps available for such data collection, the BG-Sentinel trap developed by the Biogents company uses a combination of visual cues, convection currents and olfactory signals. Although in numerous cases, this trap has shown high efficiency in sampling Aedes albopictus, in some cases low capture rates of Ae. albopictus males were recorded for the BG-sentinel mosquito trap baited with synthetic attractants. Methods The effects of modifying the BG-sentinel trap (by adding one mouse, two or three live mice to the trap) on the efficiency of trapping Ae. albopictus males and females was tested. The experiment was carried out in three distinct areas on La Réunion that have been selected for pilot field testing of the release of sterile male Ae. albopictus mosquitoes. The effect of four types of attractant (including the generic BG-Lure, one mouse or two to three mice) in baited BGS traps was tested with a Latin square design in order to control for the variability of different sampling positions and dates. Results At the three studied sites, the number of Ae. albopictus adults caught and the proportion of males per trap consistently increased with the number of mice present in the trap. Conclusion The results from this study suggest that some new attractants derived from, or similar to, mouse odors could be developed and tested in combination with other existing attractive components, such as CO2 and heat, in order to provide a reliable estimation method for Ae. albopictus adult male abundance in the wild. Electronic supplementary material The online version of this article (doi:10.1186/s13071-016-1801-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gilbert Le Goff
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - David Damiens
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Montpellier, France. .,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France.
| | - Laurent Payet
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Abdoul-Hamid Ruttee
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Frédéric Jean
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - Cyrille Lebon
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
| | - Jean-Sébastien Dehecq
- Service de lutte anti vectorielle, Agence Régionale de Santé-Océan Indien (ARS-OI), Saint-Denis, Reunion Island, France
| | - Louis-Clément Gouagna
- Institut de Recherche pour le Développement (IRD), UMR MIVEGEC (CNRS/IRD/UM), Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Montpellier, France.,IRD Réunion/GIP CYROI (Recherche Santé Bio-innovation), Sainte Clotilde, Reunion Island, France
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Li Y, Su X, Zhou G, Zhang H, Puthiyakunnon S, Shuai S, Cai S, Gu J, Zhou X, Yan G, Chen XG. Comparative evaluation of the efficiency of the BG-Sentinel trap, CDC light trap and Mosquito-oviposition trap for the surveillance of vector mosquitoes. Parasit Vectors 2016; 9:446. [PMID: 27519419 PMCID: PMC4983048 DOI: 10.1186/s13071-016-1724-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 07/25/2016] [Indexed: 11/10/2022] Open
Abstract
Background The surveillance of vector mosquitoes is important for the control of mosquito-borne diseases. To identify a suitable surveillance tool for the adult dengue vector Aedes albopictus, the efficacy of the BG-Sentinel trap, CDC light trap and Mosquito-oviposition trap (MOT) on the capture of vector mosquitoes were comparatively evaluated in this study. Methods The capture efficiencies of the BG-Sentinel trap, CDC light trap and Mosquito-oviposition trap for common vector mosquitoes were tested in a laboratory setting, through the release-recapture method, and at two field sites of Guangzhou, China from June 2013 to May 2014. The captured mosquitoes were counted, species identified and compared among the three traps on the basis of species. Results In the release-recapture experiments in a laboratory setting, the BG-Sentinel trap caught significantly more Aedes albopictus and Culex quinquefasciatus than the CDC light trap and Mosquito-ovitrap, except for Anopheles sinensis. The BG-Sentinel trap had a higher efficacy in capturing female rather than male Ae. albopictus and Cx. quinquefasciatus, but the capture in CDC light traps displayed no significant differences. In the field trial, BG-Sentinel traps collected more Aedes albopictus than CDC light traps and MOTs collected in both urban and suburban areas. The BG-Sentinel trap was more sensitive for monitoring the population density of Aedes albopictus than the CDC light trap and MOT during the peak months of the year 2013. However, on an average, CDC light traps captured significantly more Cx. quinquefasciatus than BG-Sentinel traps. The population dynamics of Cx. quinquefasciatus displayed a significant seasonal variation, with the lowest numbers in the middle of the year. Conclusions This study indicates that the BG-Sentinel trap is more effective than the commonly used CDC light trap and MOT in sampling adult Aedes albopictus and Culex quinquefasciatus. We recommend its use in the surveillance of dengue vector mosquitoes in China. Electronic supplementary material The online version of this article (doi:10.1186/s13071-016-1724-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yiji Li
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Xinghua Su
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Guofa Zhou
- Program in Public Health, School of Medicine, University of California, Irvine, USA
| | - Hong Zhang
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Santhosh Puthiyakunnon
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Shufen Shuai
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Songwu Cai
- Department of Vector Control, Centers for Disease Control and Prevention of Guangdong Province, Guangzhou, China
| | - Jinbao Gu
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Xiaohong Zhou
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China
| | - Guiyun Yan
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China.,Program in Public Health, School of Medicine, University of California, Irvine, USA
| | - Xiao-Guang Chen
- Key Laboratory of Prevention and Control for Emerging Infectious Diseases of Guangdong Higher Institutes, Department of Pathogen Biology, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou North Avenue No.1838, Guangzhou, 510515, China.
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High Prevalence of West Nile Virus in Domestic Birds and Detection in 2 New Mosquito Species in Madagascar. PLoS One 2016; 11:e0147589. [PMID: 26807720 PMCID: PMC4725773 DOI: 10.1371/journal.pone.0147589] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 01/06/2016] [Indexed: 12/19/2022] Open
Abstract
West Nile virus is an arthropod-borne zoonosis transmitted by a large number of mosquito species, and birds play a key role as reservoir of the virus. Its distribution is largely widespread over Africa, Asia, the Americas and Europe. Since 1978, it has frequently been reported in Madagascar. Studies described a high seroprevalence level of the virus in humans in different areas of the island and a human fatal case of WNV infection was reported in 2011. Despite these reports, the epidemiology of WNV in Madagascar, in particular, viral circulation remains unclear. To explore the transmission of WNV in two rural human populations of Madagascar, we investigated local mosquitoes and poultry for evidence of current infections, and determined seroprevalence of candidate sentinel species among the local poultry. These 2 areas are close to lakes where domestic birds, migratory wild birds and humans coexist. Serological analysis revealed WNV antibodies in domestic birds (duck, chicken, goose, turkey and guinea fowl) sampled in both districts (Antsalova 29.4% and Mitsinjo 16.7%). West Nile virus nucleic acid was detected in one chicken and in 8 pools of mosquitoes including 2 mosquito species (Aedeomyia madagascarica and Anopheles pauliani) that have not been previously described as candidate vectors for WNV. Molecular analysis of WNV isolates showed that all viruses detected were part of the lineage 2 that is mainly distributed in Africa, and were most closely matched by the previous Malagasy strains isolated in 1988. Our study showed that WNV circulates in Madagascar amongst domestic birds and mosquitoes, and highlights the utility of poultry as a surveillance tool to detect WNV transmission in a peri-domestic setting.
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