1
|
Kaboré BA, Taqi SD, Mkinga A, Morales Zambrana AE, Mach RL, Vreysen MJB, de Beer CJ. Radiation dose fractionation and its potential hormetic effects on male Glossina palpalis gambiensis (Diptera: Glossinidae): a comparative study of reproductive and flight quality parameters. Parasite 2024; 31:4. [PMID: 38334684 PMCID: PMC10854482 DOI: 10.1051/parasite/2024001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 01/03/2023] [Indexed: 02/10/2024] Open
Abstract
One of the most critical factors for implementing the sterile insect technique for the management of tsetse is the production of large quantities of highly competitive sterile males in the field. Several factors may influence the biological quality of sterile males, but optimizing the irradiation protocols to limit unwanted somatic cell damage could improve male performance. This study evaluated the effect of fractionation of gamma radiation doses on the fertility and flight quality of male Glossina palpalis gambiensis. Induced sterility was assessed by mating irradiated males with virgin fertile females. Flight quality was assessed using a standard protocol. The male flies were irradiated as pupae on day 23-27 post larviposition with 110 Gy, either in a single dose or in fractionations of 10 + 100 Gy and 50 + 60 Gy separated by 1-, 2- and 3-day intervals or 55 + 55 Gy separated by 4-, 8-, and 24-hour intervals. All treatments induced more than 90% sterility in females mated with irradiated males, as compared with untreated males. No significant differences were found in emergence rate or flight propensity between fractionated and single radiation doses, nor between the types of fractionations. Overall, the 50(D0) + 60(D1) Gy dose showed slightly higher induced sterility, flight propensity, and survival of males under feeding regime. Dose fractionation resulted in only small improvements with respect to flight propensity and survival, and this should be traded off with the required increase in labor that dose fractionation entails, especially in larger control programs.
Collapse
Affiliation(s)
- Bénéwendé Aristide Kaboré
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
- Institute of Chemical, Environmental and Bioscience Engineering, Vienna University of Technology, Gumpendorfer Straße 1a 1060 Vienna Austria
- Insectarium de Bobo-Dioulasso-Campagne d’Eradication de la mouche Tsétsé et de la Trypanosomose Bobo-Dioulasso BP 1087 Burkina Faso
| | - Syeda Dua Taqi
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
| | - Athumani Mkinga
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
- Vector and Vector-Borne Diseases Institute, Tanzania Veterinary Laboratory Agency 1026 Tanga Tanzania
| | - Anibal E Morales Zambrana
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
| | - Robert L Mach
- Institute of Chemical, Environmental and Bioscience Engineering, Vienna University of Technology, Gumpendorfer Straße 1a 1060 Vienna Austria
| | - Marc JB Vreysen
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
| | - Chantel J de Beer
- Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna International Centre 1400 Vienna Austria
| |
Collapse
|
2
|
Tussey DA, Morreale R, Carvalho DO, Stenhouse S, Lloyd AM, Hoel DF, Hahn DA. Developing methods for chilling, compacting, and sterilizing adult Aedes aegypti (Diptera: Culicidae) and comparing mating competitiveness between males sterilized as adults versus pupae for sterile male release. JOURNAL OF MEDICAL ENTOMOLOGY 2023; 60:1038-1047. [PMID: 37341187 DOI: 10.1093/jme/tjad079] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 06/01/2023] [Accepted: 06/08/2023] [Indexed: 06/22/2023]
Abstract
The yellow fever mosquito, Aedes aegypti L., can transmit several pathogens responsible for human diseases. With insecticide resistance development becoming a concern, alternative control strategies are needed for Ae. aegypti. Sterile insect technique (SIT) is an increasingly popular option being explored. However, logistical issues in mass production and sterilization make it difficult to maintain a SIT program. Male mosquitoes are typically irradiated as pupae because this is the earliest developmental point at which females can be separated from males, but asynchrony in pupation and high variability in pupal responses to irradiation based on pupal age make it difficult to sterilize mass quantities of pupae on a regular schedule in a rearing facility. Young adult mosquitoes have wider windows for irradiation sterilization than pupae, which can allow facilities to have fixed schedules for irradiation. We produced a workflow for adult Ae. aegypti irradiation in a mosquito control district with an operational SIT program that currently irradiates pupae. The impacts of chilling, compaction, and radiation dose on survival were all assessed before combining them into a complete adult irradiation protocol. Males chilled up to 16 h prior to compaction and compacted to 100 males/cm3 during radiation resulted in low mortality. Males irradiated as adults had increased longevity and similar sterility compared to males irradiated as pupae. Additionally, males sterilized as adults were more sexually competitive than males sterilized as pupae. Thus, we have shown that irradiating adult males can be a viable option to increase the efficiency of this operational mosquito SIT program.
Collapse
Affiliation(s)
- Dylan A Tussey
- Department of Entomology & Nematology, University of Florida, Gainesville, FL, USA
- Department of Entomology, University of California Riverside, Parlier, CA, USA
| | | | - Danilo O Carvalho
- International Atomic Energy Agency, Insect Pest Control Section, Siebersdorf, Austria
| | | | - Aaron M Lloyd
- Lee County Mosquito Control District, Lehigh Acres, FL, USA
| | - David F Hoel
- Lee County Mosquito Control District, Lehigh Acres, FL, USA
| | - Daniel A Hahn
- Department of Entomology & Nematology, University of Florida, Gainesville, FL, USA
| |
Collapse
|
3
|
Yamada H, Maïga H, Kraupa C, Somda NSB, Mamai W, Wallner T, Bouyer J. Radiation dose-fractionation in adult Aedes aegypti mosquitoes. Parasite 2023; 30:5. [PMID: 36762942 PMCID: PMC9912927 DOI: 10.1051/parasite/2023005] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 01/15/2023] [Indexed: 02/11/2023] Open
Abstract
Balancing process efficiency and adult sterile male biological quality is one of the challenges in the success of the sterile insect technique (SIT) against insect pest populations. For the SIT against mosquitoes, many stress factors need to be taken into consideration when producing sterile males that require high biological quality to remain competitive once released in the field. Pressures of mass rearing, sex sorting, irradiation treatments, packing, transport and release including handling procedures for each step, add to the overall stress budget of the sterile male post-release. Optimizing the irradiation step to achieve maximum sterility while keeping off-target somatic damage to a minimum can significantly improve male mating competitiveness. It is therefore worth examining various protocols that have been found to be effective in other insect species, such as dose fractionation. A fully sterilizing dose of 70 Gy was administered to Aedes aegypti males as one acute dose or fractionated into either two equal doses of 35 Gy, or one low dose of 10 Gy followed by a second dose of 60 Gy. The two doses were separated by either 1- or 2-day intervals. Longevity, flight ability, and mating competitiveness tests were performed to identify beneficial effects of the various treatments. Positive effects of fractionating dose were seen in terms of male longevity and mating competitiveness. Although applying split doses generally improved male quality parameters, the benefits may not outweigh the added labor in SIT programmes for the management of mosquito vectors.
Collapse
|
4
|
Gómez M, Macedo AT, Pedrosa MC, Hohana F, Barros V, Pires B, Barbosa L, Brito M, Garziera L, Argilés-Herrero R, Virginio JF, Carvalho DO. Exploring Conditions for Handling Packing and Shipping Aedes aegypti Males to Support an SIT Field Project in Brazil. INSECTS 2022; 13:871. [PMID: 36292819 PMCID: PMC9604236 DOI: 10.3390/insects13100871] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/16/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The sterile insect technique (SIT) application, as an alternative tool for conventional mosquito control methods, has recently gained prominence. Nevertheless, some SIT components require further development, such as protocols under large-scale conditions, focusing on packing and shipping mosquitoes, and considering transporting time. Immobilization of Aedes aegypti males was tested at temperatures 4, 7, 10, and 14 °C, and each temperature was assessed for 60, 90, and 120 min. The recovery after 24 h was also studied. Chilled and control-reared males had comparable survival rates for all conditions, although 4 °C for 120 min impacted male survival. The male escape rate was affected after 60 min of exposure at 4 °C; this difference was not significant, with 24 h of recovery. First, we defined the successful immobilization at 4 °C for 60 min, thus enabling the evaluation of two transportation intervals: 6 and 24 h, with the assessment of different compaction densities of 100 and 150 mosquitoes/cm3 at 10 °C to optimize the shipment. Compaction during simulated mosquito shipments reduced survival rates significantly after 6 and 24 h. In the mating propensity and insemination experiments, the sterile males managed to inseminate 40 to 66% for all treatments in laboratory conditions. The male insemination propensity was affected only by the highest compaction condition concerning the control. The analysis of the densities (100 and 150 males/cm3) showed that a higher density combined with an extended shipment period (24 h) negatively impacted the percentage of inseminated females. The results are very helpful in developing and improving the SIT packing and shipment protocols. Further studies are required to evaluate all combined parameters' synergetic effects that can combine irradiation to assess sexual competitiveness when sterile males are released into the field.
Collapse
Affiliation(s)
- Maylen Gómez
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
- Insect Pest Control Subprogramme, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, P.O. Box 100 Vienna, Austria
| | - Aline T. Macedo
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Michelle C. Pedrosa
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Fernanda Hohana
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Verenna Barros
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Bianca Pires
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Lucas Barbosa
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Miriam Brito
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Luiza Garziera
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Rafael Argilés-Herrero
- Insect Pest Control Subprogramme, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, P.O. Box 100 Vienna, Austria
| | - Jair F. Virginio
- Biofábrica Moscamed Brasil, Quadra D-13, Lote 15, Distrito Industrial do São Francisco, Juazeiro 48909-733, Brazil
| | - Danilo O. Carvalho
- Insect Pest Control Subprogramme, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, P.O. Box 100 Vienna, Austria
| |
Collapse
|
5
|
Current Status of Mosquito Handling, Transporting and Releasing in Frame of the Sterile Insect Technique. INSECTS 2022; 13:insects13060532. [PMID: 35735869 PMCID: PMC9224830 DOI: 10.3390/insects13060532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/04/2022] [Accepted: 06/08/2022] [Indexed: 11/17/2022]
Abstract
The sterile insect technique (SIT) and its related technologies are considered to be a powerful weapon for fighting against mosquitoes. As an important part of the area-wide integrated pest management (AW-IPM) programs, SIT can help reduce the use of chemical pesticides for mosquito control, and consequently, the occurrence of insecticide resistance. The mosquito SIT involves several important steps, including mass rearing, sex separation, irradiation, packing, transportation, release and monitoring. To enable the application of SIT against mosquitoes to reduce vector populations, the Joint Food and Agriculture Organization of the United Nations (FAO) and the International Atomic Energy Agency (IAEA) Centre (previously called Division) of Nuclear Techniques in Food and Agriculture (hereinafter called Joint FAO/IAEA Centre) and its Insects Pest Control sub-program promoted a coordinated research project (CRP) entitled "Mosquito handling, transport, release and male trapping methods" to enhance the success of SIT. This article summarizes the existing explorations that are critical to the handling and transporting of male mosquitoes, offers an overview of detailed steps in SIT and discusses new emerging methods for mosquito releases, covering most processes of SIT.
Collapse
|
6
|
Crawford JE, Hopkins KC, Buchman A, Zha T, Howell P, Kakani E, Ohm JR, Snoad N, Upson L, Holeman J, Massaro P, Dobson SL, Mulligan FS, White BJ. Reply to: Assessing the efficiency of Verily's automated process for production and release of male Wolbachia-infected mosquitoes. Nat Biotechnol 2022; 40:1443-1446. [PMID: 35618925 DOI: 10.1038/s41587-022-01325-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 04/18/2022] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Anna Buchman
- Verily Life Sciences, South San Francisco, CA, USA
| | - Tiantian Zha
- Verily Life Sciences, South San Francisco, CA, USA
| | - Paul Howell
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | - Nigel Snoad
- Verily Life Sciences, South San Francisco, CA, USA
| | - Linus Upson
- Verily Life Sciences, South San Francisco, CA, USA
| | - Jodi Holeman
- Consolidated Mosquito Abatement District, Parlier, CA, USA
| | | | - Stephen L Dobson
- MosquitoMate Inc., Lexington, KY, USA.,Department of Entomology, University of Kentucky, Lexington, KY, USA
| | | | | |
Collapse
|
7
|
Assessment of packing density and transportation effect on sterilized pupae and adult Aedes aegypti (Diptera: Culicidae) in non-chilled conditions. Acta Trop 2022; 226:106243. [PMID: 34800376 DOI: 10.1016/j.actatropica.2021.106243] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/15/2021] [Accepted: 11/08/2021] [Indexed: 11/24/2022]
Abstract
Long-distance transportation from a radiation facility to a target site potentially affects the quantity and quality of sterile male mosquitoes. This study tested the effects of multi-hour land transportation on the survival, longevity, and mating performance of gamma-rays sterilized adult and pupal male mosquitoes at different densities in non-chilled condition. The results demonstrated that mortality rate, longevity, induced sterility (IS) level, and mating competitiveness (C index) were significantly affected by life stage, transportation treatment, and density. Transportation was detrimental to the survival and longevity of the adults, and transporting pupae was restricted by the overcrowding effect; particularly, those packing density of 200 pupae. The longevity of transported mosquitoes were 1-5 days shorter than that of non-transported mosquitoes regardless of packing density. The irradiated transported adult males exhibited an equal IS and C index to their non-transported counterparts. Although there was no evidence suggested an association between low mating competitiveness and packing density in the transported adults, the mating competitiveness of adult mosquitoes decreased with increased packing density. Additionally, the effects of transportation and packing density on the mating ability of transported pupal males were also notable. The results indicate the factors of packing density and life stages in transporting sterile males under non-chilled conditions should be taken into account in formulating the procedure in SIT operation.
Collapse
|
8
|
Ross PA. Designing effective Wolbachia release programs for mosquito and arbovirus control. Acta Trop 2021; 222:106045. [PMID: 34273308 DOI: 10.1016/j.actatropica.2021.106045] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 01/22/2023]
Abstract
Mosquitoes carrying endosymbiotic bacteria called Wolbachia are being released in mosquito and arbovirus control programs around the world through two main approaches: population suppression and population replacement. Open field releases of Wolbachia-infected male mosquitoes have achieved over 95% population suppression by reducing the fertility of wild mosquito populations. The replacement of populations with Wolbachia-infected females is self-sustaining and can greatly reduce local dengue transmission by reducing the vector competence of mosquito populations. Despite many successful interventions, significant questions and challenges lie ahead. Wolbachia, viruses and their mosquito hosts can evolve, leading to uncertainty around the long-term effectiveness of a given Wolbachia strain, while few ecological impacts of Wolbachia releases have been explored. Wolbachia strains are diverse and the choice of strain to release should be made carefully, taking environmental conditions and the release objective into account. Mosquito quality control, thoughtful community awareness programs and long-term monitoring of populations are essential for all types of Wolbachia intervention. Releases of Wolbachia-infected mosquitoes show great promise, but existing control measures remain an important way to reduce the burden of mosquito-borne disease.
Collapse
|
9
|
Christofferson RC, Parker DM, Overgaard HJ, Hii J, Devine G, Wilcox BA, Nam VS, Abubakar S, Boyer S, Boonnak K, Whitehead SS, Huy R, Rithea L, Sochantha T, Wellems TE, Valenzuela JG, Manning JE. Current vector research challenges in the greater Mekong subregion for dengue, Malaria, and Other Vector-Borne Diseases: A report from a multisectoral workshop March 2019. PLoS Negl Trop Dis 2020; 14:e0008302. [PMID: 32730249 PMCID: PMC7392215 DOI: 10.1371/journal.pntd.0008302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Rebecca C. Christofferson
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, United States of America
| | - Daniel M. Parker
- University of California, Irvine, California, United States of America
| | | | | | - Gregor Devine
- QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Bruce A. Wilcox
- ASEAN Institute for Health Development, Mahidol University, Nakhon Pathom, Thailand
| | - Vu Sinh Nam
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Sazaly Abubakar
- Tropical Infectious Diseases Research and Education Center, Kuala Lumpur, Malaysia
| | | | - Kobporn Boonnak
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Stephen S. Whitehead
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Rekol Huy
- National Center for Parasitology Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Leang Rithea
- National Center for Parasitology Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Tho Sochantha
- National Center for Parasitology Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Thomas E. Wellems
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Jesus G. Valenzuela
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Jessica E. Manning
- US National Institute of Allergy and Infectious Diseases, Phnom Penh, Cambodia
| |
Collapse
|
10
|
Mamai W, Maiga H, Somda NSB, Wallner T, Konczal A, Yamada H, Bouyer J. Aedes aegypti larval development and pupal production in the FAO/IAEA mass-rearing rack and factors influencing sex sorting efficiency. ACTA ACUST UNITED AC 2020; 27:43. [PMID: 32553098 PMCID: PMC7301634 DOI: 10.1051/parasite/2020041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 06/01/2020] [Indexed: 11/14/2022]
Abstract
The production of a large number of mosquitoes of high biological qualities and reliable sex sorting before release are key challenges when applying the sterile insect technique as part of an area-wide integrated pest management approach. There is a need to fully evaluate the production capacity of the equipment developed in order to plan and maintain a daily production level for large-scale operational release activities. This study aimed to evaluate the potential use of the FAO/IAEA larval rearing unit for Aedes aegypti and the subsequent female contamination rate after sex sorting with a Fay–Morlan glass separator. Trays from each rack were tilted and their contents sorted either for each individual tray or after mixing the content of all trays from the rack. The pupal production and the female contamination rate were estimated with respect to day of collection, position of the tray, type of pupae collection, and sorting operator. Results showed significant daily variability of pupal production and female contamination rate, with a high male pupal production level achieved on the second day of collection and estimated female contamination of male pupae reached around 1%. Neither tray position nor type of pupae collection affected the pupal production and female contamination rate. However, the operator had a significant effect on the female contamination rate. These results highlight the need to optimize pupal production at early days of collection and to develop a more effective and automated method of sex separation.
Collapse
Affiliation(s)
- Wadaka Mamai
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria - Institut de Recherche Agricole pour le Développement (IRAD), PO Box 2123, Yaoundé, Cameroun
| | - Hamidou Maiga
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria - Institut de Recherche en Sciences de la Santé/Direction Régionale de l'Ouest (IRSS/DRO), 01 PO Box 545, Bobo-Dioulasso, Burkina Faso
| | - Nanwintoum Séverin Bimbilé Somda
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria - Institut de Recherche en Sciences de la Santé/Direction Régionale de l'Ouest (IRSS/DRO), 01 PO Box 545, Bobo-Dioulasso, Burkina Faso - Laboratoire d'Entomologie Fondamentale et Appliquée (LEFA), Université Joseph Ki-Zerbo, 03 PO Box 7021, Ouagadougou, Burkina Faso
| | - Thomas Wallner
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria
| | - Anna Konczal
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria
| | - Hanano Yamada
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria
| | - Jérémy Bouyer
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, 1400 Vienna, Austria - CIRAD, UMR ASTRE CIRAD-INRA "Animals, Health, Territories, Risks and Ecosystems", Campus International de Baillarguet, 34398 Montpellier Cedex 05, France
| |
Collapse
|
11
|
Crawford JE, Clarke DW, Criswell V, Desnoyer M, Cornel D, Deegan B, Gong K, Hopkins KC, Howell P, Hyde JS, Livni J, Behling C, Benza R, Chen W, Dobson KL, Eldershaw C, Greeley D, Han Y, Hughes B, Kakani E, Karbowski J, Kitchell A, Lee E, Lin T, Liu J, Lozano M, MacDonald W, Mains JW, Metlitz M, Mitchell SN, Moore D, Ohm JR, Parkes K, Porshnikoff A, Robuck C, Sheridan M, Sobecki R, Smith P, Stevenson J, Sullivan J, Wasson B, Weakley AM, Wilhelm M, Won J, Yasunaga A, Chan WC, Holeman J, Snoad N, Upson L, Zha T, Dobson SL, Mulligan FS, Massaro P, White BJ. Efficient production of male Wolbachia-infected Aedes aegypti mosquitoes enables large-scale suppression of wild populations. Nat Biotechnol 2020; 38:482-492. [PMID: 32265562 DOI: 10.1038/s41587-020-0471-x] [Citation(s) in RCA: 180] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 02/10/2020] [Accepted: 02/27/2020] [Indexed: 11/09/2022]
Abstract
The range of the mosquito Aedes aegypti continues to expand, putting more than two billion people at risk of arboviral infection. The sterile insect technique (SIT) has been used to successfully combat agricultural pests at large scale, but not mosquitoes, mainly because of challenges with consistent production and distribution of high-quality male mosquitoes. We describe automated processes to rear and release millions of competitive, sterile male Wolbachia-infected mosquitoes, and use of these males in a large-scale suppression trial in Fresno County, California. In 2018, we released 14.4 million males across three replicate neighborhoods encompassing 293 hectares. At peak mosquito season, the number of female mosquitoes was 95.5% lower (95% CI, 93.6-96.9) in release areas compared to non-release areas, with the most geographically isolated neighborhood reaching a 99% reduction. This work demonstrates the high efficacy of mosquito SIT in an area ninefold larger than in previous similar trials, supporting the potential of this approach in public health and nuisance-mosquito eradication programs.
Collapse
Affiliation(s)
| | | | | | | | - Devon Cornel
- Consolidated Mosquito Abatement District, Parlier, CA, USA
| | | | - Kyle Gong
- Verily Life Sciences, South San Francisco, CA, USA
| | | | - Paul Howell
- Verily Life Sciences, South San Francisco, CA, USA
| | | | - Josh Livni
- Verily Life Sciences, South San Francisco, CA, USA
| | | | - Renzo Benza
- Verily Life Sciences, South San Francisco, CA, USA
| | - Willa Chen
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | | | - Yi Han
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | | | | | - Erika Lee
- Verily Life Sciences, South San Francisco, CA, USA
| | - Teresa Lin
- Verily Life Sciences, South San Francisco, CA, USA
| | - Jianyi Liu
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | | | | | | | - David Moore
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | | | - Chris Robuck
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | - Peter Smith
- Verily Life Sciences, South San Francisco, CA, USA
| | | | | | - Brian Wasson
- Verily Life Sciences, South San Francisco, CA, USA
| | | | - Mark Wilhelm
- Verily Life Sciences, South San Francisco, CA, USA
| | - Joshua Won
- Verily Life Sciences, South San Francisco, CA, USA
| | - Ari Yasunaga
- Verily Life Sciences, South San Francisco, CA, USA
| | | | - Jodi Holeman
- Consolidated Mosquito Abatement District, Parlier, CA, USA
| | - Nigel Snoad
- Verily Life Sciences, South San Francisco, CA, USA
| | - Linus Upson
- Verily Life Sciences, South San Francisco, CA, USA
| | - Tiantian Zha
- Verily Life Sciences, South San Francisco, CA, USA
| | - Stephen L Dobson
- MosquitoMate Inc., Lexington, KY, USA.,Department of Entomology, University of Kentucky, Lexington, KY, USA
| | | | | | | |
Collapse
|
12
|
Culbert NJ, Somda NSB, Hamidou M, Soma DD, Caravantes S, Wallner T, Wadaka M, Yamada H, Bouyer J. A rapid quality control test to foster the development of the sterile insect technique against Anopheles arabiensis. Malar J 2020; 19:44. [PMID: 31973756 PMCID: PMC6979282 DOI: 10.1186/s12936-020-3125-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 01/16/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND With the fight against malaria reportedly stalling there is an urgent demand for alternative and sustainable control measures. As the sterile insect technique (SIT) edges closer to becoming a viable complementary tool in mosquito control, it will be necessary to find standardized techniques of assessing male quality throughout the production system and post-irradiation handling. Flight ability is known to be a direct marker of insect quality. A new version of the reference International Atomic Energy Agency/Food and Agricultural Organization (IAEA/FAO) flight test device (FTD), modified to measure the flight ability and in turn quality of male Anopheles arabiensis within a 2-h period via a series of verification experiments is presented. METHODS Anopheles arabiensis juveniles were mass reared in a rack and tray system. 7500 male pupae were sexed under a stereomicroscope (2500 per treatment). Stress treatments included irradiation (with 50, 90, 120 or 160 Gy, using a Gammacell 220), chilling (at 0, 4, 8 and 10 °C) and compaction weight (5, 15, 25, and 50 g). Controls did not undergo any stress treatment. Three days post-emergence, adult males were subjected to either chilling or compaction (or were previously irradiated at pupal stage), after which two repeats (100 males) from each treatment and control group were placed in a FTD to measure flight ability. Additionally, one male was caged with 10 virgin females for 4 days to assess mating capacity (five repeats). Survival was monitored daily for a period of 15 days on remaining adults (two repeats). RESULTS Flight ability results accurately predicted male quality following irradiation, with the first significant difference occurring at an irradiation dose of 90 Gy, a result which was reflected in both survival and insemination rates. A weight of 5 g or more significantly reduced flight ability and insemination rate, with survival appearing less sensitive and not significantly impacted until a weight of 15 g was imposed. Flight ability was significantly reduced after treatments at 4 °C with the insemination rate more sensitive to chilling with survival again less sensitive (8 and 0 °C, respectively). CONCLUSIONS The reported results conclude that the output of a short flight ability test, adapted from the previously tested Aedes FTD, is an accurate indicator of male mosquito quality and could be a useful tool for the development of the SIT against An. arabiensis.
Collapse
Affiliation(s)
- Nicole J Culbert
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria. .,Institute of Integrative Biology & the Centre for Genomic Research, University of Liverpool, Liverpool, Merseyside, UK.
| | - Nanwintoum Séverin Bimbilé Somda
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.,Institut de Recherche en Sciences de la Santé/Centre Muraz, Bobo-Dioulasso, Burkina Faso.,Laboratoire d'Entomologie Fondamentale et Appliquée (LEFA), Université Ouaga 1 Professeur Joseph Ki-Zerbo, Ouagadougou, Burkina Faso
| | - Maiga Hamidou
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.,Institut de Recherche en Sciences de la Santé/Centre Muraz, Bobo-Dioulasso, Burkina Faso
| | - Dieudonné Diloma Soma
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.,Institut de Recherche en Sciences de la Santé/Centre Muraz, Bobo-Dioulasso, Burkina Faso.,Université Nazi Boni de Bobo-Dioulasso, Bobo-Dioulasso, Burkina Faso
| | - Silvana Caravantes
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Thomas Wallner
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Mamai Wadaka
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Hanano Yamada
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Jérémy Bouyer
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| |
Collapse
|