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Wijegunawardana NDAD, Gunawardene YINS, Abeyewickreme W, Chandrasena TGAN, Thayanukul P, Kittayapong P. Diversity of Wolbachia infections in Sri Lankan mosquitoes with a new record of Wolbachia Supergroup B infecting Aedes aegypti vector populations. Sci Rep 2024; 14:11966. [PMID: 38796552 PMCID: PMC11127934 DOI: 10.1038/s41598-024-62476-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 05/17/2024] [Indexed: 05/28/2024] Open
Abstract
Wolbachia bacteria are common endosymbionts of insects and have recently been applied for controlling arboviral vectors, especially Aedes aegypti mosquito populations. However, several medically important mosquito species in Sri Lanka were present with limited information for the Wolbachia infection status. Therefore, the screening of Wolbachia in indigenous mosquitoes is required prior to a successful application of Wolbachia-based vector control strategy. In this study, screening of 78 mosquito species collected from various parts of the country revealed that 13 species were positive for Wolbachia infection, giving ~ 17% infection frequency of Wolbachia among the Sri Lankan mosquitoes. Twelve Wolbachia-positive mosquito species were selected for downstream Wolbachia strain genotyping using Multi Locus Sequencing Type (MLST), wsp gene, and 16S rRNA gene-based approaches. Results showed that these Wolbachia strains clustered together with the present Wolbachia phylogeny of world mosquito populations with some variations. Almost 90% of the mosquito populations were infected with supergroup B while the remaining were infected with supergroup A. A new record of Wolbachia supergroup B infection in Ae. aegypti, the main vectors of dengue, was highlighted. This finding was further confirmed by real-time qPCR, revealing Wolbachia density variations between Ae. aegypti and Ae. albopictus (p = 0.001), and between males and females (p < 0.05). The evidence of natural Wolbachia infections in Ae. aegypti populations in Sri Lanka is an extremely rare incident that has the potential to be used for arboviral vector control.
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Affiliation(s)
- N D A D Wijegunawardana
- Graduate Program in Molecular Medicine, Faculty of Science, Mahidol University, Phayathai, Thailand
- Department of Bioprocess Technology, Faculty of Technology, Rajarata University of Sri Lanka, Mihintale, Sri Lanka
| | | | - W Abeyewickreme
- Department of Parasitology, Faculty of Medicine, General Sir Johan Kotelawala Defence University, Dehiwala-Mount Lavinia, Sri Lanka
| | - T G A N Chandrasena
- Department of Parasitology, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka
| | - P Thayanukul
- Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University, Salaya, Thailand.
- Department of Biology, Faculty of Science, Mahidol University, Phayathai, Thailand.
| | - P Kittayapong
- Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University, Salaya, Thailand
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Scussel S, Gaudillat B, Esnault J, Lejarre Q, Duployer M, Lebon C, Benlali A, Mavingui P, Tortosa P, Cattel J. Combining transinfected Wolbachia and a genetic sexing strain to control Aedes albopictus in laboratory-controlled conditions. Proc Biol Sci 2024; 291:20240429. [PMID: 38628128 PMCID: PMC11021938 DOI: 10.1098/rspb.2024.0429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 03/14/2024] [Indexed: 04/19/2024] Open
Abstract
The global expansion of Aedes albopictus has stimulated the development of environmentally friendly methods aiming to control disease transmission through the suppression of natural vector populations. Sterile male release programmes are currently being deployed worldwide, and are challenged by the availability of an efficient sex separation which can be achieved mechanically at the pupal stage and/or by artificial intelligence at the adult stage, or through genetic sexing, which allows separating males and females at an early development stage. In this study, we combined the genetic sexing strain previously established based on the linkage of dieldrin resistance to the male locus with a Wolbachia transinfected line. For this, we introduced either the wPip-I or the wPip-IV strain from Culex pipiens in an asymbiotic Wolbachia-free Ae. albopictus line. We then measured the penetrance of cytoplasmic incompatibility and life-history traits of both transinfected lines, selected the wPip-IV line and combined it with the genetic sexing strain. Population suppression experiments demonstrated a 90% reduction in population size and a 50% decrease in hatching rate. Presented results showed that such a combination has a high potential in terms of vector control but also highlighted associated fitness costs, which should be reduced before large-scale field assay.
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Affiliation(s)
- Sarah Scussel
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Benjamin Gaudillat
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Jérémy Esnault
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Quentin Lejarre
- Symbiosis Technologies for Insect Control (SymbioTIC), Plateforme de Recherche Cyroi, 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Marianne Duployer
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Cyrille Lebon
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Aude Benlali
- Groupement d'Intérêt Public Cyclotron Océan Indien (CYROI), 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
| | - Patrick Mavingui
- Université de La Réunion, Unité Mixte de Recherche Processus Infectieux en Milieu Insulaire Tropical (UMR PIMIT), CNRS 9192, INSERM 1187, IRD 249. Plateforme de recherché CYROI, 2 rue Maxime Rivière, 97490 Ste Clotilde, La Réunion, France
| | - Pablo Tortosa
- Université de La Réunion, Unité Mixte de Recherche Processus Infectieux en Milieu Insulaire Tropical (UMR PIMIT), CNRS 9192, INSERM 1187, IRD 249. Plateforme de recherché CYROI, 2 rue Maxime Rivière, 97490 Ste Clotilde, La Réunion, France
| | - Julien Cattel
- Symbiosis Technologies for Insect Control (SymbioTIC), Plateforme de Recherche Cyroi, 2 rue Maxime Rivière, 97490 Ste Clotilde, Ste Clotilde, France
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Miranda LS, Rudd SR, Mena O, Hudspeth PE, Barboza-Corona JE, Park HW, Bideshi DK. The Perpetual Vector Mosquito Threat and Its Eco-Friendly Nemeses. BIOLOGY 2024; 13:182. [PMID: 38534451 DOI: 10.3390/biology13030182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/28/2024]
Abstract
Mosquitoes are the most notorious arthropod vectors of viral and parasitic diseases for which approximately half the world's population, ~4,000,000,000, is at risk. Integrated pest management programs (IPMPs) have achieved some success in mitigating the regional transmission and persistence of these diseases. However, as many vector-borne diseases remain pervasive, it is obvious that IPMP successes have not been absolute in eradicating the threat imposed by mosquitoes. Moreover, the expanding mosquito geographic ranges caused by factors related to climate change and globalization (travel, trade, and migration), and the evolution of resistance to synthetic pesticides, present ongoing challenges to reducing or eliminating the local and global burden of these diseases, especially in economically and medically disadvantaged societies. Abatement strategies include the control of vector populations with synthetic pesticides and eco-friendly technologies. These "green" technologies include SIT, IIT, RIDL, CRISPR/Cas9 gene drive, and biological control that specifically targets the aquatic larval stages of mosquitoes. Regarding the latter, the most effective continues to be the widespread use of Lysinibacillus sphaericus (Ls) and Bacillus thuringiensis subsp. israelensis (Bti). Here, we present a review of the health issues elicited by vector mosquitoes, control strategies, and lastly, focus on the biology of Ls and Bti, with an emphasis on the latter, to which no resistance has been observed in the field.
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Affiliation(s)
- Leticia Silva Miranda
- Graduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
| | - Sarah Renee Rudd
- Graduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
- Integrated Biomedical Graduate Studies, and School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Oscar Mena
- Undergraduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
| | - Piper Eden Hudspeth
- Undergraduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
| | - José E Barboza-Corona
- Departmento de Alimentos, Posgrado en Biociencias, Universidad de Guanajuato Campus Irapuato-Salamanca, Irapuato 36500, Guanajuato, Mexico
| | - Hyun-Woo Park
- Graduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
- Undergraduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
| | - Dennis Ken Bideshi
- Graduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
- Undergraduate Program in Biomedical Sciences, Department of Biological Sciences, California Baptist University, Riverside, CA 92504, USA
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Villena OC, McClure KM, Camp RJ, LaPointe DA, Atkinson CT, Sofaer HR, Berio Fortini L. Environmental and geographical factors influence the occurrence and abundance of the southern house mosquito, Culex quinquefasciatus, in Hawai'i. Sci Rep 2024; 14:604. [PMID: 38182650 PMCID: PMC10770078 DOI: 10.1038/s41598-023-49793-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 12/12/2023] [Indexed: 01/07/2024] Open
Abstract
Hawaiian honeycreepers, a group of endemic Hawaiian forest birds, are being threatened by avian malaria, a non-native disease that is driving honeycreepers populations to extinction. Avian malaria is caused by the parasite Plasmodium relictum, which is transmitted by the invasive mosquito Culex quinquefasciatus. Environmental and geographical factors play an important role in shaping mosquito-borne disease transmission dynamics through their influence on the distribution and abundance of mosquitoes. We assessed the effects of environmental (temperature, precipitation), geographic (site, elevation, distance to anthropogenic features), and trap type (CDC light trap, CDC gravid trap) factors on mosquito occurrence and abundance. Occurrence was analyzed using classification and regression tree models (CART) and generalized linear models (GLM); abundance (count data) was analyzed using generalized linear mixed models (GLMMs). Models predicted highest mosquito occurrence at mid-elevation sites and between July and November. Occurrence increased with temperature and precipitation up to 580 mm. For abundance, the best model was a zero-inflated negative-binomial model that indicated higher abundance of mosquitoes at mid-elevation sites and peak abundance between August and October. Estimation of occurrence and abundance as well as understanding the factors that influence them are key for mosquito control, which may reduce the risk of forest bird extinction.
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Affiliation(s)
- Oswaldo C Villena
- Hawai'i Cooperative Studies Unit, University of Hawai'i at Hilo, Hilo, HI, 96720, USA
- The Earth Commons Institute, Georgetown University, Washington, DC, 20057, USA
| | - Katherine M McClure
- Hawai'i Cooperative Studies Unit, University of Hawai'i at Hilo, Hilo, HI, 96720, USA
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA
| | - Richard J Camp
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA
| | - Dennis A LaPointe
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA
| | - Carter T Atkinson
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA
| | - Helen R Sofaer
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA
| | - Lucas Berio Fortini
- U.S. Geological Survey, Pacific Island Ecosystems Research Center, Hawai'i National Park, HI, 96718, USA.
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Davison HR, Crozier J, Pirro S, Kampen H, Werner D, Hurst GDD. 'Candidatus Tisiphia' is a widespread Rickettsiaceae symbiont in the mosquito Anopheles plumbeus (Diptera: Culicidae). Environ Microbiol 2023; 25:3064-3074. [PMID: 37658745 PMCID: PMC10947512 DOI: 10.1111/1462-2920.16486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/08/2023] [Indexed: 09/05/2023]
Abstract
Symbiotic bacteria can alter host biology by providing protection from natural enemies, or alter reproduction or vectoral competence. Symbiont-linked control of vector-borne disease in Anopheles has been hampered by a lack of symbioses that can establish stable vertical transmission in the host. Previous screening found the symbiont 'Candidatus Tisiphia' in Anopheles plumbeus, an aggressive biter and potential secondary vector of malaria parasites and West Nile virus. We screened samples collected over 10-years across Germany and used climate databases to assess environmental influence on incidence. We observed a 95% infection rate, and that the frequency of infection did not fluctuate with broad environmental factors. Maternal inheritance is indicated by presence in the ovaries through FISH microscopy. Finally, we assembled a high-quality 1.6 Mbp draft genome of 'Ca. Tisiphia' to explore its phylogeny and potential metabolic competence. The infection is closely related to strains found in Culicoides biting midges and shows similar patterns of metabolism, providing no evidence of the capacity to synthesize B-vitamins. This infection offers avenues for onward research in anopheline mosquito symbioses. Additionally, it provides future opportunity to study the impact of 'Ca. Tisiphia' on natural and transinfected hosts, especially in relation to reproductive fitness and vectorial competence and capacity.
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Affiliation(s)
- Helen R. Davison
- Institute of Infection, Veterinary and Ecological Sciences (IVES)University of LiverpoolLiverpoolUK
| | - Jessica Crozier
- Institute of Infection, Veterinary and Ecological Sciences (IVES)University of LiverpoolLiverpoolUK
| | | | - Helge Kampen
- Institute of Infectology (IMED)Friedrich‐Loeffler‐Institut, Federal Research Institute for Animal HealthGreifswaldIsle of RiemsGermany
| | - Doreen Werner
- Land Use and GovernanceLeibniz Centre for Agricultural Landscape Research (ZALF)MünchebergGermany
| | - Gregory D. D. Hurst
- Institute of Infection, Veterinary and Ecological Sciences (IVES)University of LiverpoolLiverpoolUK
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da Moura AJF, Valadas V, Da Veiga Leal S, Montalvo Sabino E, Sousa CA, Pinto J. Screening of natural Wolbachia infection in mosquitoes (Diptera: Culicidae) from the Cape Verde islands. Parasit Vectors 2023; 16:142. [PMID: 37098535 PMCID: PMC10131387 DOI: 10.1186/s13071-023-05745-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/17/2023] [Indexed: 04/27/2023] Open
Abstract
BACKGROUND Wolbachia pipientis is an endosymbiont bacterium that induces cytoplasmic incompatibility and inhibits arboviral replication in mosquitoes. This study aimed to assess Wolbachia prevalence and genetic diversity in different mosquito species from Cape Verde. METHODS Mosquitoes were collected on six islands of Cape Verde and identified to species using morphological keys and PCR-based assays. Wolbachia was detected by amplifying a fragment of the surface protein gene (wsp). Multilocus sequence typing (MLST) was performed with five housekeeping genes (coxA, gatB, ftsZ, hcpA, and fbpA) and the wsp hypervariable region (HVR) for strain identification. Identification of wPip groups (wPip-I to wPip-V) was performed using PCR-restriction fragment length polymorphism (RFLP) assay on the ankyrin domain gene pk1. RESULTS Nine mosquito species were collected, including the major vectors Aedes aegypti, Anopheles arabiensis, Culex pipiens sensu stricto, and Culex quinquefasciatus. Wolbachia was only detected in Cx. pipiens s.s. (100% prevalence), Cx. quinquefasciatus (98.3%), Cx. pipiens/quinquefasciatus hybrids (100%), and Culex tigripes (100%). Based on the results of MLST and wsp hypervariable region typing, Wolbachia from the Cx. pipiens complex was assigned to sequence type 9, wPip clade, and supergroup B. PCR/RFLP analysis revealed three wPip groups in Cape Verde, namely wPip-II, wPip-III, and wPip-IV. wPip-IV was the most prevalent, while wPip-II and wPip-III were found only on Maio and Fogo islands. Wolbachia detected in Cx. tigripes belongs to supergroup B, with no attributed MLST profile, indicating a new strain of Wolbachia in this mosquito species. CONCLUSIONS A high prevalence and diversity of Wolbachia was found in species from the Cx. pipiens complex. This diversity may be related to the mosquito's colonization history on the Cape Verde islands. To the best of our knowledge, this is the first study to detect Wolbachia in Cx. tigripes, which may provide an additional opportunity for biocontrol initiatives.
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Affiliation(s)
- Aires Januário Fernandes da Moura
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL., Rua da Junqueira 100, 1349-008, Lisboa, Portugal.
- Unidade de Ciências da Natureza, da Vida E Do Ambiente, Universidade Jean Piaget de Cabo Verde, Praia, Cape Verde.
| | - Vera Valadas
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL., Rua da Junqueira 100, 1349-008, Lisboa, Portugal
| | - Silvania Da Veiga Leal
- Laboratório de Entomologia Médica, Instituto Nacional de Saúde Pública, Praia, Cape Verde
| | - Eddyson Montalvo Sabino
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL., Rua da Junqueira 100, 1349-008, Lisboa, Portugal
- Laboratório de Simulidos, Universidad Nacional Hermilio Valdizan, Huánuco, Peru
| | - Carla A Sousa
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL., Rua da Junqueira 100, 1349-008, Lisboa, Portugal
| | - João Pinto
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL., Rua da Junqueira 100, 1349-008, Lisboa, Portugal
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Macfarlane NB, Adams J, Bennett EL, Brooks TM, Delborne JA, Eggermont H, Endy D, Esvelt KM, Kolodziejczyk B, Kuiken T, Oliva MJ, Peña Moreno S, Slobodian L, Smith RB, Thizy D, Tompkins DM, Wei W, Redford KH. Direct and indirect impacts of synthetic biology on biodiversity conservation. iScience 2022; 25:105423. [DOI: 10.1016/j.isci.2022.105423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Miranda Paez A, Chalkowski K, Zohdy S, Willoughby JR. Management of avian malaria in populations of high conservation concern. Parasit Vectors 2022; 15:208. [PMID: 35705963 PMCID: PMC9199230 DOI: 10.1186/s13071-022-05327-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/18/2022] [Indexed: 12/04/2022] Open
Abstract
Avian malaria is a vector-borne disease that is caused by Plasmodium parasites. These parasites are transmitted via mosquito bites and can cause sickness or death in a wide variety of birds, including many threatened and endangered species. This Primer first provides contextual background for the avian malaria system including the life cycle, geographic distribution and spread. Then, we focus on recent advances in understanding avian malaria ecology, including how avian malaria can lead to large ecosystem changes and variation in host immune responses to Plasmodium infection. Finally, we review advances in avian malaria management in vulnerable bird populations including genetic modification methods suitable for limiting the effects of this disease in wild populations and the use of sterile insect techniques to reduce vector abundance.
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Affiliation(s)
- Andrea Miranda Paez
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL, USA.
| | - Kayleigh Chalkowski
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL, USA
| | - Sarah Zohdy
- College of Forestry, Wildlife and Environment and College of Veterinary Medicine, Auburn University, Auburn, AL, USA
| | - Janna R Willoughby
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL, USA
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Hidayanti AK, Gazali A, Tagami Y. Effect of Quorum Sensing Inducers and Inhibitors on Cytoplasmic Incompatibility Induced by Wolbachia (Rickettsiales: Anaplasmataceae) in American Serpentine Leafminer (Diptera: Agromyzidae): Potential Tool for the Incompatible Insect Technique. JOURNAL OF INSECT SCIENCE (ONLINE) 2022; 22:8. [PMID: 35066589 PMCID: PMC8784088 DOI: 10.1093/jisesa/ieab106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Indexed: 06/14/2023]
Abstract
Agricultural crops around the world are attacked by approximately 3,000-10,000 species of pest insect. There is increasing interest in resolving this problem using environmentally friendly approaches. Wolbachia (Hertig), an insect endosymbiont, can modulate host reproduction and offspring sex through cytoplasmic incompatibility (CI). The incompatible insect technique (IIT) based on CI-Wolbachia is a promising biological control method. Previous studies have reported an association between CI and Wolbachia density, which may involve a quorum sensing (QS) mechanism. In this study, we investigated the effect of manipulating QS in Wolbachia using several chemicals including 3O-C12-HSL; C2HSL; spermidine (QS inducers), 4-phenylbutanoyl; and 4-NPO (QS inhibitors) on American serpentine leafminer (Liriomyza trifolii [Burgess]), an agricultural pest. The results showed that inducing QS with 3O-C12-HSL decreased the proportion of hatched eggs and increased Wolbachia density, whereas QS inhibition with 4-phenylbutanoyl had the opposite effects. Thus, manipulating QS in Wolbachia can alter cell density and the proportion of hatched eggs in the host L. trifolii, thereby reducing the number of insect progeny. These findings provide evidence supporting the potential efficacy of the IIT based on CI-Wolbachia for the environmentally friendly control of insect pest populations.
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Affiliation(s)
| | - Achmad Gazali
- School of Biological Environment, UGSAS, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yohsuke Tagami
- Laboratory of Applied Entomology, Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-Ku, Shizuoka 422-8529, Japan
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A Review: Aedes-Borne Arboviral Infections, Controls and Wolbachia-Based Strategies. Vaccines (Basel) 2021; 9:vaccines9010032. [PMID: 33435566 PMCID: PMC7827552 DOI: 10.3390/vaccines9010032] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/28/2020] [Accepted: 01/05/2021] [Indexed: 12/31/2022] Open
Abstract
Arthropod-borne viruses (Arboviruses) continue to generate significant health and economic burdens for people living in endemic regions. Of these viruses, some of the most important (e.g., dengue, Zika, chikungunya, and yellow fever virus), are transmitted mainly by Aedes mosquitoes. Over the years, viral infection control has targeted vector population reduction and inhibition of arboviral replication and transmission. This control includes the vector control methods which are classified into chemical, environmental, and biological methods. Some of these control methods may be largely experimental (both field and laboratory investigations) or widely practised. Perceptively, one of the biological methods of vector control, in particular, Wolbachia-based control, shows a promising control strategy for eradicating Aedes-borne arboviruses. This can either be through the artificial introduction of Wolbachia, a naturally present bacterium that impedes viral growth in mosquitoes into heterologous Aedes aegypti mosquito vectors (vectors that are not natural hosts of Wolbachia) thereby limiting arboviral transmission or via Aedes albopictus mosquitoes, which naturally harbour Wolbachia infection. These strategies are potentially undermined by the tendency of mosquitoes to lose Wolbachia infection in unfavourable weather conditions (e.g., high temperature) and the inhibitory competitive dynamics among co-circulating Wolbachia strains. The main objective of this review was to critically appraise published articles on vector control strategies and specifically highlight the use of Wolbachia-based control to suppress vector population growth or disrupt viral transmission. We retrieved studies on the control strategies for arboviral transmissions via arthropod vectors and discussed the use of Wolbachia control strategies for eradicating arboviral diseases to identify literature gaps that will be instrumental in developing models to estimate the impact of these control strategies and, in essence, the use of different Wolbachia strains and features.
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Naegeli H, Bresson J, Dalmay T, Dewhurst IC, Epstein MM, Guerche P, Hejatko J, Moreno FJ, Mullins E, Nogué F, Rostoks N, Sánchez Serrano JJ, Savoini G, Veromann E, Veronesi F, Bonsall MB, Mumford J, Wimmer EA, Devos Y, Paraskevopoulos K, Firbank LG. Adequacy and sufficiency evaluation of existing EFSA guidelines for the molecular characterisation, environmental risk assessment and post-market environmental monitoring of genetically modified insects containing engineered gene drives. EFSA J 2020; 18:e06297. [PMID: 33209154 PMCID: PMC7658669 DOI: 10.2903/j.efsa.2020.6297] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Advances in molecular and synthetic biology are enabling the engineering of gene drives in insects for disease vector/pest control. Engineered gene drives (that bias their own inheritance) can be designed either to suppress interbreeding target populations or modify them with a new genotype. Depending on the engineered gene drive system, theoretically, a genetic modification of interest could spread through target populations and persist indefinitely, or be restricted in its spread or persistence. While research on engineered gene drives and their applications in insects is advancing at a fast pace, it will take several years for technological developments to move to practical applications for deliberate release into the environment. Some gene drive modified insects (GDMIs) have been tested experimentally in the laboratory, but none has been assessed in small-scale confined field trials or in open release trials as yet. There is concern that the deliberate release of GDMIs in the environment may have possible irreversible and unintended consequences. As a proactive measure, the European Food Safety Authority (EFSA) has been requested by the European Commission to review whether its previously published guidelines for the risk assessment of genetically modified animals (EFSA, 2012 and 2013), including insects (GMIs), are adequate and sufficient for GDMIs, primarily disease vectors, agricultural pests and invasive species, for deliberate release into the environment. Under this mandate, EFSA was not requested to develop risk assessment guidelines for GDMIs. In this Scientific Opinion, the Panel on Genetically Modified Organisms (GMO) concludes that EFSA's guidelines are adequate, but insufficient for the molecular characterisation (MC), environmental risk assessment (ERA) and post-market environmental monitoring (PMEM) of GDMIs. While the MC,ERA and PMEM of GDMIs can build on the existing risk assessment framework for GMIs that do not contain engineered gene drives, there are specific areas where further guidance is needed for GDMIs.
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Pejchar L, Lepczyk CA, Fantle-Lepczyk JE, Hess SC, Johnson MT, Leopold CR, Marchetti M, McClure KM, Shiels AB. Hawaii as a Microcosm: Advancing the Science and Practice of Managing Introduced and Invasive Species. Bioscience 2020. [DOI: 10.1093/biosci/biz154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Invasive species are a leading driver of global change, with consequences for biodiversity and society. Because of extraordinary rates of endemism, introduction, and extinction, Hawaii offers a rich platform for exploring the cross-disciplinary challenges of managing invasive species in a dynamic world. We highlight key successes and shortcomings to share lessons learned and inspire innovation and action in and beyond the archipelago. We then discuss thematic challenges and opportunities of broad relevance to invaded ecosystems and human communities. Important research needs and possible actions include eradicating mammals from mainland island sanctuaries, assessing hidden threats from poorly known introduced species, harnessing genomic tools to eradicate disease vectors, structured decision-making to achieve common objectives among diverse stakeholders, and enhancing capacity through nontraditional funding streams and progressive legislation. By shining a spotlight on invasive species at the front lines in Hawaii, we hope to catalyze strategic research and practice to help inform scientists and policymakers.
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Affiliation(s)
| | | | | | - Steven C Hess
- US Geological Survey Pacific Islands Ecosystems Research Station, Hawaii Volcanoes National Park, Hawaii
| | - M Tracy Johnson
- US Department of Agriculture Forest Service, Hawaii Volcanoes National Park, Hawaii
| | | | | | - Katherine M McClure
- University of California Santa Cruz when this project began and is now a postdoctoral fellow at Cornell University in Ithaca, New York
| | - Aaron B Shiels
- USDA Animal and Plant Health Inspection Service National Wildlife Research Center, Fort Collins, Colorado
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13
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Nikolouli K, Sassù F, Mouton L, Stauffer C, Bourtzis K. Combining sterile and incompatible insect techniques for the population suppression of Drosophila suzukii. JOURNAL OF PEST SCIENCE 2020; 93:647-661. [PMID: 32132880 PMCID: PMC7028798 DOI: 10.1007/s10340-020-01199-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 12/28/2019] [Accepted: 01/16/2020] [Indexed: 05/13/2023]
Abstract
The spotted wing Drosophila, Drosophila suzukii, has recently invaded Europe and the Americas, and it is a major threat for a wide variety of commercial soft fruits both in open field and greenhouse production systems. D. suzukii infests a wide range of ripening fruits, leading to substantial yield and revenue losses. As the application of insecticides close to the harvest period poses great concerns, the development of an efficient environment-friendly control approach to fight D. suzukii is necessary. In this study, we exploited the sterile insect technique (SIT) in combination with Wolbachia symbiosis as a population suppression approach that can constitute a potential component of an area-wide integrated pest management program. We aimed to establish a combined SIT/incompatible insect technique (IIT) protocol that would require lower irradiation doses as a complementary tool for D. suzukii management. Two D. suzukii lines trans-infected with the Wolbachia wHa and wTei strains were irradiated at doses four times less than usual (e.g., 45 Gy), and the egg hatching and adult emergence were determined. Our results indicated that wHa and wTei females as well as wHa males were sterile at this low dose. The longevity, adult emergence and flight ability of adults were evaluated, and no major effect caused by irradiation was detected. Our data indicate that a SIT/IIT protocol can be a competent approach for D. suzukii management.
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Affiliation(s)
- K. Nikolouli
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - F. Sassù
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - L. Mouton
- Laboratoire de Biométrie et Biologie Evolutive, CNRS, Université de Lyon, Université Claude Bernard Lyon 1, 69100 Villeurbanne, France
| | - C. Stauffer
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
| | - K. Bourtzis
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
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Asimakis ED, Doudoumis V, Hadapad AB, Hire RS, Batargias C, Niu C, Khan M, Bourtzis K, Tsiamis G. Detection and characterization of bacterial endosymbionts in Southeast Asian tephritid fruit fly populations. BMC Microbiol 2019; 19:290. [PMID: 31870298 PMCID: PMC7050614 DOI: 10.1186/s12866-019-1653-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Various endosymbiotic bacteria, including Wolbachia of the Alphaproteobacteria, infect a wide range of insects and are capable of inducing reproductive abnormalities to their hosts such as cytoplasmic incompatibility (CI), parthenogenesis, feminization and male-killing. These extended phenotypes can be potentially exploited in enhancing environmentally friendly methods, such as the sterile insect technique (SIT), for controlling natural populations of agricultural pests. The goal of the present study is to investigate the presence of Wolbachia, Spiroplasma, Arsenophonus and Cardinium among Bactrocera, Dacus and Zeugodacus flies of Southeast Asian populations, and to genotype any detected Wolbachia strains. RESULTS A specific 16S rRNA PCR assay was used to investigate the presence of reproductive parasites in natural populations of nine different tephritid species originating from three Asian countries, Bangladesh, China and India. Wolbachia infections were identified in Bactrocera dorsalis, B. correcta, B. scutellaris and B. zonata, with 12.2-42.9% occurrence, Entomoplasmatales in B. dorsalis, B. correcta, B. scutellaris, B. zonata, Zeugodacus cucurbitae and Z. tau (0.8-14.3%) and Cardinium in B. dorsalis and Z. tau (0.9-5.8%), while none of the species tested, harbored infections with Arsenophonus. Infected populations showed a medium (between 10 and 90%) or low (< 10%) prevalence, ranging from 3 to 80% for Wolbachia, 2 to 33% for Entomoplasmatales and 5 to 45% for Cardinium. Wolbachia and Entomoplasmatales infections were found both in tropical and subtropical populations, the former mostly in India and the latter in various regions of India and Bangladesh. Cardinium infections were identified in both countries but only in subtropical populations. Phylogenetic analysis revealed the presence of Wolbachia with some strains belonging either to supergroup B or supergroup A. Sequence analysis revealed deletions of variable length and nucleotide variation in three Wolbachia genes. Spiroplasma strains were characterized as citri-chrysopicola-mirum and ixodetis strains while the remaining Entomoplasmatales to the Mycoides-Entomoplasmataceae clade. Cardinium strains were characterized as group A, similar to strains infecting Encarsia pergandiella. CONCLUSIONS Our results indicated that in the Southeast natural populations examined, supergroup A Wolbachia strain infections were the most common, followed by Entomoplasmatales and Cardinium. In terms of diversity, most strains of each bacterial genus detected clustered in a common group. Interestingly, the deletions detected in three Wolbachia genes were either new or similar to those of previously identified pseudogenes that were integrated in the host genome indicating putative horizontal gene transfer events in B. dorsalis, B. correcta and B. zonata.
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Affiliation(s)
- Elias D. Asimakis
- Department of Environmental Engineering, University of Patras, 2 Seferi St., 30100 Agrinio, Greece
| | - Vangelis Doudoumis
- Department of Environmental Engineering, University of Patras, 2 Seferi St., 30100 Agrinio, Greece
- Department of Fisheries & Aquaculture Management, Technological Educational Institute of Western Greece, 30200 Messolonghi, Greece
| | - Ashok B. Hadapad
- Nuclear Agriculture & Biotechnology Division, Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, Maharashtra 400 085 India
| | - Ramesh S. Hire
- Nuclear Agriculture & Biotechnology Division, Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, Maharashtra 400 085 India
| | - Costas Batargias
- Department of Fisheries & Aquaculture Management, Technological Educational Institute of Western Greece, 30200 Messolonghi, Greece
| | - Changying Niu
- Huazhong Agricultural University, Wuhan, 430070 Hubei China
| | - Mahfuza Khan
- Insect Biotechnology Division, Institute of Food and Radiation Biology
(IFRB), Atomic Energy Research Establishment (AERE), Ganakbari, Savar, Dhaka 1349 Bangladesh
| | - Kostas Bourtzis
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear
Techniques in Food and Agriculture, Vienna International Centre, P.O. Box 100, 1400 Vienna, Austria
| | - George Tsiamis
- Department of Environmental Engineering, University of Patras, 2 Seferi St., 30100 Agrinio, Greece
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Suresh M, Jeevanandam J, Chan YS, Danquah MK, Kalaiarasi JMV. Opportunities for Metal Oxide Nanoparticles as a Potential Mosquitocide. BIONANOSCIENCE 2019. [DOI: 10.1007/s12668-019-00703-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Dahlin K, Feng Z. Modeling the population impacts of avian malaria on Hawaiian honeycreepers: Bifurcation analysis and implications for conservation. Math Biosci 2019; 318:108268. [PMID: 31669327 DOI: 10.1016/j.mbs.2019.108268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 10/06/2019] [Accepted: 10/07/2019] [Indexed: 01/27/2023]
Abstract
Avian malaria is a mosquito-borne parasitic disease of birds caused by protists of the genera Plasmodium, most notably Plasmodium relictum. This disease has been identified as a primary cause of the drastic decline and extinctions of birds, in particular Hawaiian honeycreepers (Drepanidinae), where rates of mortality may exceed 90%. We formulate an epizootiological model of the transmission dynamics of avian malaria between populations of bird hosts and mosquito vectors using a system of compartmental ordinary differential equations. We derive the basic reproduction number as well as criteria for the existence and local stability of disease-free and enzootic equilibria. These results provide useful information for evaluating management strategies. A local sensitivity analysis of certain model invariants to uncertain parameter values is performed to ascertain which biological factors have the largest impact on ecological outcomes and, in particular, long-term bird population densities. We discuss and compare the effectiveness of two disease control and conservation strategies: captive propagation of honeycreepers and larval mosquito habitat reduction. We provide examples of combinations of these strategies that either are predicted to eliminate enzootic avian malaria or to increase predicted bird density above a given ecologically meaningful threshold.
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Affiliation(s)
- Kyle Dahlin
- Purdue University, 150 N University Street, West Lafayette, IN, USA.
| | - Zhilan Feng
- Purdue University, 150 N University Street, West Lafayette, IN, USA
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Sicard M, Bonneau M, Weill M. Wolbachia prevalence, diversity, and ability to induce cytoplasmic incompatibility in mosquitoes. CURRENT OPINION IN INSECT SCIENCE 2019; 34:12-20. [PMID: 31247412 DOI: 10.1016/j.cois.2019.02.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
To protect humans and domestic animals from mosquito borne diseases, alternative methods to chemical insecticides have to be found. Pilot studies using the vertically transmitted bacterial endosymbiont Wolbachia were already launched in different parts of the world. Wolbachia can be used either in Incompatible Insect Technique (IIT), to decrease mosquito population, or to decrease the ability of mosquitoes to transmit pathogens. Not all mosquito species are naturally infected with Wolbachia: while in Culex pipiens and Aedes albopictus almost all individuals harbor Wolbachia, putative infections have to be further investigated in Anopheles species and in Aedes aegypti. All Wolbachia-based control methods rely on the ability of Wolbachia to induce cytoplasmic incompatibility (CI) resulting in embryonic death in incompatible crossings. Knowledge on CI diversity in mosquito is required to find the better Wolbachia-mosquito associations to optimize the success of both 'sterile insect' and 'pathogen blocking' Wolbachia-based methods.
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Affiliation(s)
- Mathieu Sicard
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France.
| | - Manon Bonneau
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France
| | - Mylène Weill
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France.
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Gunathilaka N, Ranathunge T, Udayanga L, Wijegunawardena A, Gilles JRL, Abeyewickreme W. Use of mechanical and behavioural methods to eliminate female Aedes aegypti and Aedes albopictus for sterile insect technique and incompatible insect technique applications. Parasit Vectors 2019; 12:148. [PMID: 30922368 PMCID: PMC6437921 DOI: 10.1186/s13071-019-3398-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 03/13/2019] [Indexed: 02/07/2023] Open
Abstract
Background Sex separation of mosquitoes at different stages is currently being attempted to ensure the successful release of male mosquitoes in novel vector control approaches. Mechanical and behavioral techniques have been tried most frequently. Methods Batches of (n = 300) Aedes aegypti and Ae. albopictus pupae were used for standard sieving (using sieves with 1.12, 1.25, 1.40 and 1.60 mm mesh sizes) and the Fay-Morlan glass plate separation methods. Male and female separation by each method was calculated. For behavioral separation, a spiked blood meal with different concentrations (0, 2, 4, 6, 8 and 10 ppm) of ivermectin and spinosad (spinosyn, 12% w/v), were provided to a batch (n = 300) of adult Ae. aegypti and Ae. albopictus (1:1 sex ratio) followed by observation of mortality. An additional “double feeding method” involved provision of a further blood meal after 24 h, with the same concentrations of ivermectin and spinosad as the initial feeding, followed by a 48-h observation of mortality. All experiments were repeated five times. Results In the standard sieving method, the percentage of males and females separated at different pore sizes differed significantly (P < 0.05). The majority of the male pupae were collected in the 1.12 mm pore sized sieve for both Ae. aegypti (73%) and Ae. albopictus (69%) while females were retained mainly in the sieve with the pore size of 1.25 mm. In the Fay-Morlan glass plate separation, 99.0% of the Ae. aegypti and 99.2% of the Ae. albopictus introduced male pupae could be separated, but with female contaminations of 16 and 12%, respectively. Provision of a blood meal spiked with 8 ppm of ivermectin under the “double feeding” was identified as the most effective way of achieving 100% female elimination for both Aedes species. Conclusions With 100% separation, use of a spiked blood meal is a more effective method of sex separation than the mechanical methods. Application of the spiked blood meal approach as a second separation level for sexes, after applying the Fay-Morlan glass plate method, could achieve 100% sex separation of sexes whilst allowing a reduction in the amount of toxicants required.
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Affiliation(s)
- Nayana Gunathilaka
- Department of Parasitology, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka.
| | - Tharaka Ranathunge
- Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka
| | - Lahiru Udayanga
- Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka.,Department of Biosystems Engineering, Faculty of Agriculture & Plantation Management, Wayamba University of Sri Lanka, Makadura, Sri Lanka
| | - Asha Wijegunawardena
- Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka
| | - Jeremie Roger Lionel Gilles
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, Vienna, Austria
| | - Wimaladharma Abeyewickreme
- Department of Paraclinical Sciences, Faculty of Medicine, Sir John Kotelawala Defence University, Ratmalana, Sri Lanka
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Zheng B, Yu J. Characterization of Wolbachia enhancing domain in mosquitoes with imperfect maternal transmission. JOURNAL OF BIOLOGICAL DYNAMICS 2018; 12:596-610. [PMID: 30025503 DOI: 10.1080/17513758.2018.1499969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
A novel method to reduce the burden of dengue is to seed wild mosquitoes with Wolbachia-infected mosquitoes in dengue-endemic areas. Concerns in current mathematical models are to locate the Wolbachia introduction threshold. Our recent findings manifest that the threshold is highly dependent on the initial population size once Wolbachia infection alters the logistic control death rate of infected females. However, counting mosquitoes is beyond the realms of possibility. A plausible method is to monitor the infection frequency. We propose the concept of Wolbachia enhancing domain in which the infection frequency keeps increasing. A detailed description of the domain is presented. Our results suggest that both the initial population size and the infection frequency should be taken into account for optimal release strategies. Both Wolbachia fixation and extinction permit the oscillation of the infection frequency.
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Affiliation(s)
- Bo Zheng
- a College of Mathematics and Information Sciences , Guangzhou University , Guangzhou , People's Republic of China
- b Center for Applied Mathematics , Guangzhou University , Guangzhou , People's Republic of China
| | - Jianshe Yu
- a College of Mathematics and Information Sciences , Guangzhou University , Guangzhou , People's Republic of China
- b Center for Applied Mathematics , Guangzhou University , Guangzhou , People's Republic of China
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Altinli M, Gunay F, Alten B, Weill M, Sicard M. Wolbachia diversity and cytoplasmic incompatibility patterns in Culex pipiens populations in Turkey. Parasit Vectors 2018; 11:198. [PMID: 29558974 PMCID: PMC5859491 DOI: 10.1186/s13071-018-2777-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 03/06/2018] [Indexed: 12/04/2022] Open
Abstract
Background Wolbachia are maternally transmitted bacteria that can manipulate their hosts’ reproduction causing cytoplasmic incompatibility (CI). CI is a sperm-egg incompatibility resulting in embryonic death. Due to this sterilising effect on mosquitoes, Wolbachia are considered for vector control strategies. Important vectors for arboviruses, filarial nematodes and avian malaria, mosquitoes of Culex pipiens complex are suitable for Wolbachia-based vector control. They are infected with Wolbachia wPip strains belonging to five genetically distinct groups (wPip-I to V) within the Wolbachia B supergroup. CI properties of wPip strongly correlate with this genetic diversity: mosquitoes infected with wPip strains from a different wPip group are more likely to be incompatible with each other. Turkey is a critical spot for vector-borne diseases due to its unique geographical position as a natural bridge between Asia, Europe and Africa. However, general wPip diversity, distribution and CI patterns in natural Cx. pipiens (s.l.) populations in the region are unknown. In this study, we first identified wPip diversity in Turkish Cx. pipiens (s.l.) populations, by assigning them to one of the five groups within wPip (wPip-Ito V). We further investigated CI properties between different wPip strains from this region. Results We showed a wPip fixation in Cx. pipiens (s.l.) populations in Turkey by analysing 753 samples from 59 sampling sites. Three wPip groups were detected in the region: wPip-I, wPip-II and wPip-IV. The most dominant group was wPip-II. While wPip-IV was restricted to only two locations, wPip-I and wPip-II had wider distributions. Individuals infected with wPip-II were found co-existing with individuals infected with wPip-I or wPip-IV in some sampling sites. Two mosquito isofemale lines harbouring either a wPip-I or a wPip-II strain were established from a population in northwestern Turkey. Reciprocal crosses between these lines showed that they were fully compatible with each other but bidirectionally incompatible with wPip-IV Istanbul infected line. Conclusion Our findings reveal a high diversity of wPip and CI properties in Cx. pipiens (s.l.) populations in Turkey. Knowledge on naturally occurring CI patterns caused by wPip diversity in Turkey might be useful for Cx. pipiens (s.l.) control in the region.
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Affiliation(s)
- Mine Altinli
- Institut des Sciences de l'Evolution de Montpellier (CNRS-Université de Montpellier-IRD-EPHE), Montpellier, France.
| | - Filiz Gunay
- Faculty of Sciences, Department of Biology, Division of Ecology, VERG Laboratories, Hacettepe University, Ankara, Turkey
| | - Bulent Alten
- Faculty of Sciences, Department of Biology, Division of Ecology, VERG Laboratories, Hacettepe University, Ankara, Turkey
| | - Mylene Weill
- Institut des Sciences de l'Evolution de Montpellier (CNRS-Université de Montpellier-IRD-EPHE), Montpellier, France
| | - Mathieu Sicard
- Institut des Sciences de l'Evolution de Montpellier (CNRS-Université de Montpellier-IRD-EPHE), Montpellier, France.
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Cattel J, Nikolouli K, Andrieux T, Martinez J, Jiggins F, Charlat S, Vavre F, Lejon D, Gibert P, Mouton L. Back and forth Wolbachia
transfers reveal efficient strains to control spotted wing drosophila populations. J Appl Ecol 2018. [DOI: 10.1111/1365-2664.13101] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Julien Cattel
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
| | - Katerina Nikolouli
- Department of Forest and Soil Sciences; Boku; University of Natural Resources and Life Sciences; Vienna Austria
- Insect Pest Control Section; Joint FAO/IAEA Division of Nuclear, Techniques in Food and Agriculture; Vienna Austria
| | - Thibault Andrieux
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
| | - Julien Martinez
- Department of Genetics; University of Cambridge; Cambridge UK
| | - Francis Jiggins
- Department of Genetics; University of Cambridge; Cambridge UK
| | - Sylvain Charlat
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
| | - Fabrice Vavre
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
| | - David Lejon
- Rovaltain Research Company, RRCo; Valence Cedex France
| | - Patricia Gibert
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
| | - Laurence Mouton
- Laboratoire de Biométrie et Biologie Evolutive UMR CNRS 5558; Univ Lyon; Université Claude Bernard, CNRS; Villeurbanne France
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The potential role of Wolbachia in controlling the transmission of emerging human arboviral infections. Curr Opin Infect Dis 2018; 30:108-116. [PMID: 27849636 PMCID: PMC5325245 DOI: 10.1097/qco.0000000000000342] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Purpose of review Wolbachia is a genus of Gram-negative intracellular bacteria that is naturally found in more than half of all arthropod species. These bacteria cannot only reduce the fitness and the reproductive capacities of arthropod vectors, but also increase their resistance to arthropod-borne viruses (arboviruses). This article reviews the evidence supporting a Wolbachia-based strategy for controlling the transmission of dengue and other arboviral infections. Recent findings Studies conducted 1 year after the field release of Wolbachia-infected mosquitoes in Australia have demonstrated the suppression of dengue virus (DENV) replication in and dissemination by mosquitoes. Recent mathematical models show that this strategy could reduce the transmission of DENV by 70%. Consequently, the WHO is encouraging countries to boost the development and implementation of Wolbachia-based prevention strategies against other arboviral infections. However, the evidence regarding the efficacy of Wolbachia to prevent the transmission of other arboviral infections is still limited to an experimental framework with conflicting results in some cases. There is a need to demonstrate the efficacy of such strategies in the field under various climatic conditions, to select the Wolbachia strain that has the best pathogen interference/spread trade-off, and to continue to build community acceptance. Summary Wolbachia represents a promising tool for controlling the transmission of arboviral infections that needs to be developed further. Long-term environmental monitoring will be necessary for timely detection of potential changes in Wolbachia/vector/virus interactions.
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Nikolouli K, Colinet H, Renault D, Enriquez T, Mouton L, Gibert P, Sassu F, Cáceres C, Stauffer C, Pereira R, Bourtzis K. Sterile insect technique and Wolbachia symbiosis as potential tools for the control of the invasive species Drosophila suzukii. JOURNAL OF PEST SCIENCE 2017; 91:489-503. [PMID: 29568248 PMCID: PMC5847143 DOI: 10.1007/s10340-017-0944-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 11/30/2017] [Accepted: 12/02/2017] [Indexed: 05/27/2023]
Abstract
Drosophila suzukii, a vinegar fly originated from Southeast Asia, has recently invaded western countries, and it has been recognized as an important threat of a wide variety of several commercial soft fruits. This review summarizes the current information about the biology and dispersal of D. suzukii and discusses the current status and prospects of control methods for the management of this pest. We highlight current knowledge and ongoing research on innovative environmental-friendly control methods with emphasis on the sterile insect technique (SIT) and the incompatible insect technique (IIT). SIT has been successfully used for the containment, suppression or even eradication of populations of insect pests. IIT has been proposed as a stand-alone tool or in conjunction with SIT for insect pest control. The principles of SIT and IIT are reviewed, and the potential value of each approach in the management of D. suzukii is analyzed. We thoroughly address the challenges of SIT and IIT, and we propose the use of SIT as a component of an area-wide integrated pest management approach to suppress D. suzukii populations. As a contingency plan, we suggest a promising alternative avenue through the combination of these two techniques, SIT/IIT, which has been developed and is currently being tested in open-field trials against Aedes mosquito populations. All the potential limiting factors that may render these methods ineffective, as well as the requirements that need to be fulfilled before their application, are discussed.
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Affiliation(s)
- Katerina Nikolouli
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - Hervé Colinet
- UMR ECOBIO CNRS 6553, Université de Rennes, 1, 263 AVE du Général Leclerc, 35042 Rennes Cedex, France
| | - David Renault
- UMR ECOBIO CNRS 6553, Université de Rennes, 1, 263 AVE du Général Leclerc, 35042 Rennes Cedex, France
- Institut Universitaire de France, 1 rue Descartes, 75231 Paris, Cedex 05, France
| | - Thomas Enriquez
- UMR ECOBIO CNRS 6553, Université de Rennes, 1, 263 AVE du Général Leclerc, 35042 Rennes Cedex, France
| | - Laurence Mouton
- Laboratoire de Biométrie et Biologie Evolutive, Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, 69100 Villeurbanne, France
| | - Patricia Gibert
- Laboratoire de Biométrie et Biologie Evolutive, Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, 69100 Villeurbanne, France
| | - Fabiana Sassu
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - Carlos Cáceres
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - Christian Stauffer
- Department of Forest and Soil Sciences, Boku, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Rui Pereira
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
| | - Kostas Bourtzis
- Insect Pest Control Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Wagramerstrasse 5, PO Box 100, 1400 Vienna, Austria
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24
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Blackwood JC, Vargas R, Fauvergue X. A cascade of destabilizations: Combining
Wolbachia
and Allee effects to eradicate insect pests. J Anim Ecol 2017; 87:59-72. [DOI: 10.1111/1365-2656.12756] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Accepted: 08/26/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Julie C. Blackwood
- Department of Mathematics and StatisticsWilliams College Williamstown MA USA
| | - Roger Vargas
- Department of Mathematics and StatisticsWilliams College Williamstown MA USA
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25
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Martin-Park A, Gomez-Govea MA, Lopez-Monroy B, Treviño-Alvarado VM, Torres-Sepúlveda MDR, López-Uriarte GA, Villanueva-Segura OK, Ruiz-Herrera MDC, Martinez-Fierro MDLL, Delgado-Enciso I, Flores-Suárez AE, White GS, Martínez de Villarreal LE, Ponce-Garcia G, Black WC, Rodríguez-Sanchez IP. Profiles of Amino Acids and Acylcarnitines Related with Insecticide Exposure in Culex quinquefasciatus (Say). PLoS One 2017; 12:e0169514. [PMID: 28085898 PMCID: PMC5234828 DOI: 10.1371/journal.pone.0169514] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 12/18/2016] [Indexed: 12/04/2022] Open
Abstract
Culex quinquefasciatus Say is a vector of many pathogens of humans, and both domestic and wild animals. Personal protection, reduction of larval habitats, and chemical control are the best ways to reduce mosquito bites and, therefore, the transmission of mosquito-borne pathogens. Currently, to reduce the risk of transmission, the pyrethroids, and other insecticide groups have been extensively used to control both larvae and adult mosquitoes. In this context, amino acids and acylcarnitines have never been associated with insecticide exposure and or insecticide resistance. It has been suggested that changes in acylcarnitines and amino acids profiles could be a powerful diagnostic tool for metabolic alterations. Monitoring these changes could help to better understand the mechanisms involved in insecticide resistance, complementing the strategies for managing this phenomenon in the integrated resistance management. The purpose of the study was to determine the amino acids and acylcarnitines profiles in larvae of Cx. quinquefasciatus after the exposure to different insecticides. Bioassays were performed on Cx. quinquefasciatus larvae exposed to the diagnostic doses (DD) of the insecticides chlorpyrifos (0.001 μg/mL), temephos (0.002 μg/mL) and permethrin (0.01 μg/mL). In each sample, we analyzed the profile of 12 amino acids and 31 acylcarnitines by LC-MS/MS. A t-test was used to determine statistically significant differences between groups and corrections of q-values. Results indicates three changes, the amino acids arginine (ARG), free carnitine (C0) and acetyl-carnitine (C2) that could be involved in energy production and insecticide detoxification. We confirmed that concentrations of amino acids and acylcarnitines in Cx. quinquefasciatus vary with respect to different insecticides. The information generated contributes to understand the possible mechanisms and metabolic changes occurring during insecticide exposure.
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Affiliation(s)
- Abdiel Martin-Park
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Mayra A. Gomez-Govea
- Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México
| | - Beatriz Lopez-Monroy
- Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México
| | | | | | - Graciela Arelí López-Uriarte
- Departamento de Genética, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Olga Karina Villanueva-Segura
- Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México
| | | | | | - Ivan Delgado-Enciso
- Facultad de Medicina, Universidad de Colima, Colima, México
- Instituto Estatal de Cáncer, Secretaria de Salud de Colima, Colima, México
| | - Adriana E. Flores-Suárez
- Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México
| | - Gregory S. White
- The Coachella Valley Mosquito and Vector Control District, Indio, California, United States of America
| | | | - Gustavo Ponce-Garcia
- Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México
| | - William C. Black
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Irám Pablo Rodríguez-Sanchez
- Departamento de Genética, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
- * E-mail:
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26
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More than one rabbit out of the hat: Radiation, transgenic and symbiont-based approaches for sustainable management of mosquito and tsetse fly populations. Acta Trop 2016; 157:115-30. [PMID: 26774684 DOI: 10.1016/j.actatropica.2016.01.009] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 12/19/2022]
Abstract
Mosquitoes (Diptera: Culicidae) and tsetse flies (Diptera: Glossinidae) are bloodsucking vectors of human and animal pathogens. Mosquito-borne diseases (malaria, filariasis, dengue, zika, and chikungunya) cause severe mortality and morbidity annually, and tsetse fly-borne diseases (African trypanosomes causing sleeping sickness in humans and nagana in livestock) cost Sub-Saharan Africa an estimated US$ 4750 million annually. Current reliance on insecticides for vector control is unsustainable: due to increasing insecticide resistance and growing concerns about health and environmental impacts of chemical control there is a growing need for novel, effective and safe biologically-based methods that are more sustainable. The integration of the sterile insect technique has proven successful to manage crop pests and disease vectors, particularly tsetse flies, and is likely to prove effective against mosquito vectors, particularly once sex-separation methods are improved. Transgenic and symbiont-based approaches are in development, and more advanced in (particularly Aedes) mosquitoes than in tsetse flies; however, issues around stability, sustainability and biosecurity have to be addressed, especially when considering population replacement approaches. Regulatory issues and those relating to intellectual property and economic cost of application must also be overcome. Standardised methods to assess insect quality are required to compare and predict efficacy of the different approaches. Different combinations of these three approaches could be integrated to maximise their benefits, and all have the potential to be used in tsetse and mosquito area-wide integrated pest management programmes.
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27
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Zhang D, Lees RS, Xi Z, Bourtzis K, Gilles JRL. Combining the Sterile Insect Technique with the Incompatible Insect Technique: III-Robust Mating Competitiveness of Irradiated Triple Wolbachia-Infected Aedes albopictus Males under Semi-Field Conditions. PLoS One 2016; 11:e0151864. [PMID: 26990981 PMCID: PMC4798476 DOI: 10.1371/journal.pone.0151864] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 03/04/2016] [Indexed: 11/19/2022] Open
Abstract
Combination of the sterile insect technique with the incompatible insect technique is considered to be a safe approach to control Aedes albopictus populations in the absence of an accurate and scalable sex separation system or genetic sexing strain. Our previous study has shown that the triple Wolbachia-infected Ae. albopictus strain (wAlbA, wAlbB and wPip) was suitable for mass rearing and females could be completely sterilized as pupae with a radiation dose of at least 28 Gy. However, whether this radiation dose can influence the mating competitiveness of the triple infected males was still unknown. In this study we aimed to evaluate the effects of irradiation on the male mating competitiveness of the triple infected strain under laboratory and semi-field conditions. The results herein indicate that irradiation with a lower, female-sterilizing dose has no negative impact on the longevity of triple infected males while a reduced lifespan was observed in the wild type males (wAlbA and wAlbB) irradiated with a higher male-sterilizing dose, in small cages. At different sterile: fertile release ratios in small cages, triple-infected males induced 39.8, 81.6 and 87.8% sterility in a wild type female population at 1:1, 5:1 and 10:1 release ratios, respectively, relative to a fertile control population. Similarly, irradiated triple infected males induced 31.3, 70.5 and 89.3% sterility at 1:1, 5:1 and 10:1 release ratios, respectively, again relative to the fertile control. Under semi-field conditions at a 5:1 release ratio, relative to wild type males, the mean male mating competitiveness index of 28 Gy irradiated triple-infected males was significantly higher than 35 Gy irradiated wild type males, while triple infected males showed no difference in mean mating competitiveness to either irradiated triple-infected or irradiated wild type males. An unexpected difference was also observed in the relative male mating competitiveness of the triple infected strain after irradiation at 28 Gy dose in small vs large cages, with a higher male mating competitiveness index calculated from results of experiments in the large cages. Based on these results, we consider that the male mating performance of the triple infected strain after irradiation at 28 Gy, a dose required for complete female sterility and the avoidance of population replacement, is approximately equal to that of the wild type males under semi-field conditions. Though field evaluation is required, this suggests that the triple infected strain is suitable for irradiation and release as part of a combined SIT-IIT approach to Ae. albopictus control.
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Affiliation(s)
- Dongjing Zhang
- Sun Yat-sen University - Michigan State University Joint Center of Vector Control for Tropical Diseases, Zhongshan School of Medicine, Guangzhou, Guangdong Province, China
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Rosemary Susan Lees
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Zhiyong Xi
- Sun Yat-sen University - Michigan State University Joint Center of Vector Control for Tropical Diseases, Zhongshan School of Medicine, Guangzhou, Guangdong Province, China
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, United States of America
| | - Kostas Bourtzis
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Jeremie R. L. Gilles
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
- * E-mail:
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28
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Caragata EP, Dutra HL, Moreira LA. Exploiting Intimate Relationships: Controlling Mosquito-Transmitted Disease with Wolbachia. Trends Parasitol 2016; 32:207-218. [DOI: 10.1016/j.pt.2015.10.011] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 10/20/2015] [Accepted: 10/22/2015] [Indexed: 12/15/2022]
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29
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Wolbachia in European Populations of the Invasive Pest Drosophila suzukii: Regional Variation in Infection Frequencies. PLoS One 2016; 11:e0147766. [PMID: 26809119 PMCID: PMC4725738 DOI: 10.1371/journal.pone.0147766] [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: 10/06/2015] [Accepted: 01/07/2016] [Indexed: 12/26/2022] Open
Abstract
The invasive pest Drosophila suzukii is characterized by a specific fresh-fruit targeting behavior and has quickly become a menace for the fruit economy of newly infested North American and European regions. D. suzukii carries a strain of the endosymbiotic bacterium Wolbachia, named wSuz, which has a low infection frequency and no reproductive manipulation capabilities in American populations of D. suzukii. To further understand the nature of wSuz biology and assess its utility as a tool for controlling this pest’s populations, we investigated the prevalence of Wolbachia in 23 European D. suzukii populations, and compared our results with those available in American populations. Our data showed a highly variable infection frequency with a mean prevalence of 46%, which is significantly higher than the 17% found in American populations. Based on Multilocus Sequence Typing analysis, a single wSuz strain was diagnosed in all European populations of D. suzukii. In agreement with American data, we found no evidence of cytoplasmic incompatibility induced by wSuz. These findings raise two questions: a) why Wolbachia is maintained in field populations of D. suzukii and b) what are the selective forces responsible for the variation in prevalence within populations, particularly between European and American continents? Our results provide new insights into the D. suzukii-Wolbachia association and highlight regional variations that await further investigation and that should be taken into account for using Wolbachia-based pest management programs.
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30
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Atyame CM, Labbé P, Lebon C, Weill M, Moretti R, Marini F, Gouagna LC, Calvitti M, Tortosa P. Comparison of Irradiation and Wolbachia Based Approaches for Sterile-Male Strategies Targeting Aedes albopictus. PLoS One 2016; 11:e0146834. [PMID: 26765951 PMCID: PMC4713058 DOI: 10.1371/journal.pone.0146834] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/21/2015] [Indexed: 12/26/2022] Open
Abstract
The global expansion of Aedes albopictus together with the absence of vaccines for most of the arboviruses transmitted by this mosquito has stimulated the development of sterile-male strategies aiming at controlling disease transmission through the suppression of natural vector populations. In this context, two environmentally friendly control strategies, namely the Sterile Insect Technique (SIT) and the Wolbachia-based Incompatible Insect Technique (IIT) are currently being developed in several laboratories worldwide. So far however, there is a lack of comparative assessment of these strategies under the same controlled conditions. Here, we compared the mating capacities, i.e. insemination capacity, sterilization capacity and mating competitiveness of irradiated (35 Gy) and incompatible Ae. albopictus males at different ages and ratios under laboratory controlled conditions. Our data show that there was no significant difference in insemination capacity of irradiated and incompatible males, both male types showing lower capacities than untreated males at 1 day but recovering full capacity within 5 days following emergence. Regarding mating competitiveness trials, a global observed trend is that incompatible males tend to induce a lower hatching rate than irradiated males in cage controlled confrontations. More specifically, incompatible males were found more competitive than irradiated males in 5:1 ratio regardless of age, while irradiated males were only found more competitive than incompatible males in the 1:1 ratio at 10 days old. Overall, under the tested conditions, IIT seemed to be slightly more effective than SIT. However, considering that a single strategy will likely not be adapted to all environments, our data stimulates the need for comparative assessments of distinct strategies in up-scaled conditions in order to identify the most suitable and safe sterilizing technology to be implemented in a specific environmental setting and to identify the parameters requiring fine tuning in order to reach optimal release conditions.
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Affiliation(s)
- Célestine M. Atyame
- CRVOI, Ste Clotilde, Plateforme de Recherche CYROI, Réunion Island, France
- Unité Mixte de Recherche «Processus Infectieux en Milieu Insulaire Tropical (UMR PIMIT)», INSERM 1187, CNRS 9192, IRD 249, Université de La Réunion. Plateforme de Recherche CYROI. Ste Clotilde, Réunion Island, France
- * E-mail:
| | - Pierrick Labbé
- CNRS, IRD, ISEM - UMR 5554, Université de Montpellier, Montpellier, France
| | - Cyrille Lebon
- CRVOI, Ste Clotilde, Plateforme de Recherche CYROI, Réunion Island, France
- Unité Mixte de Recherche MIVEGEC (IRD 224, CNRS 5290, UM1-UM2), Montpellier, France
| | - Mylène Weill
- CNRS, IRD, ISEM - UMR 5554, Université de Montpellier, Montpellier, France
| | - Riccardo Moretti
- ENEA, CR Casaccia, Biotecnologies and Agro-industry Division, Roma, Italy
| | - Francesca Marini
- ENEA, CR Casaccia, Biotecnologies and Agro-industry Division, Roma, Italy
| | - Louis Clément Gouagna
- CRVOI, Ste Clotilde, Plateforme de Recherche CYROI, Réunion Island, France
- Unité Mixte de Recherche MIVEGEC (IRD 224, CNRS 5290, UM1-UM2), Montpellier, France
| | - Maurizio Calvitti
- ENEA, CR Casaccia, Biotecnologies and Agro-industry Division, Roma, Italy
| | - Pablo Tortosa
- CRVOI, Ste Clotilde, Plateforme de Recherche CYROI, Réunion Island, France
- Unité Mixte de Recherche «Processus Infectieux en Milieu Insulaire Tropical (UMR PIMIT)», INSERM 1187, CNRS 9192, IRD 249, Université de La Réunion. Plateforme de Recherche CYROI. Ste Clotilde, Réunion Island, France
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31
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Combining the Sterile Insect Technique with Wolbachia-Based Approaches: II--A Safer Approach to Aedes albopictus Population Suppression Programmes, Designed to Minimize the Consequences of Inadvertent Female Release. PLoS One 2015; 10:e0135194. [PMID: 26252474 PMCID: PMC4529199 DOI: 10.1371/journal.pone.0135194] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 07/19/2015] [Indexed: 01/17/2023] Open
Abstract
Due to the absence of a perfect method for mosquito sex separation, the combination of the sterile insect technique and the incompatible insect technique is now being considered as a potentially effective method to control Aedes albopictus. In this present study first we examine the minimum pupal irradiation dose required to induce complete sterility in Wolbachia triple-infected (HC), double-infected (GUA) and uninfected (GT) female Ae. albopictus. The HC line is a candidate for Ae. albopictus population suppression programmes, but due to the risk of population replacement which characterizes this triple infected line, the individuals to be released need to be additionally irradiated. After determining the minimum irradiation dose required for complete female sterility, we test whether sterilization is sufficient to prevent invasion of the triple infection from the HC females into double-infected (GUA) populations. Our results indicate that irradiated Ae. albopictus HC, GUA and GT strain females have decreased fecundity and egg hatch rate when irradiated, inversely proportional to the dose, and the complete sterilization of females can be acquired by pupal irradiation with doses above 28 Gy. PCR-based analysis of F1 and F2 progeny indicate that the irradiated HC females, cannot spread the new Wolbachia wPip strain into a small cage GUA population, released at a 1:5 ratio. Considering the above results, we conclude that irradiation can be used to reduce the risk of population replacement caused by an unintentional release of Wolbachia triple-infected Ae. albopictus HC strain females during male release for population suppression.
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32
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Lees RS, Gilles JR, Hendrichs J, Vreysen MJ, Bourtzis K. Back to the future: the sterile insect technique against mosquito disease vectors. CURRENT OPINION IN INSECT SCIENCE 2015; 10:156-162. [PMID: 29588003 DOI: 10.1016/j.cois.2015.05.011] [Citation(s) in RCA: 147] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/12/2015] [Accepted: 05/21/2015] [Indexed: 05/27/2023]
Abstract
With the global burden of mosquito-borne diseases increasing, and some conventional vector control tools losing effectiveness, the sterile insect technique (SIT) is a potential new tool in the arsenal. Equipment and protocols have been developed and validated for efficient mass-rearing, irradiation and release of Aedines and Anophelines that could be useful for several control approaches. Assessment of male quality is becoming more sophisticated, and several groups are well advanced in pilot site selection and population surveillance. It will not be long before SIT feasibility has been evaluated in various settings. Until perfect sexing mechanisms exist, combination of Wolbachia-induced phenotypes, such as cytoplasmic incompatibility and pathogen interference, and irradiation may prove to be the safest solution for population suppression.
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Affiliation(s)
- Rosemary Susan Lees
- Insect Pest Control Sub-programme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Jeremie Rl Gilles
- Insect Pest Control Sub-programme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Jorge Hendrichs
- Insect Pest Control Sub-programme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Marc Jb Vreysen
- Insect Pest Control Sub-programme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Kostas Bourtzis
- Insect Pest Control Sub-programme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.
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