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Lau MJ, Valdez AR, Jones MJ, Aranson I, Hoffmann AA, McGraw EA. The effect of repeat feeding on dengue virus transmission potential in Wolbachia-infected Aedes aegypti following extended egg quiescence. PLoS Negl Trop Dis 2024; 18:e0012305. [PMID: 38976758 DOI: 10.1371/journal.pntd.0012305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 06/21/2024] [Indexed: 07/10/2024] Open
Abstract
As Wolbachia pipientis is more widely being released into field populations of Aedes aegypti for disease control, the ability to select the appropriate strain for differing environments is increasingly important. A previous study revealed that longer-term quiescence in the egg phase reduced the fertility of mosquitoes, especially those harboring the wAlbB Wolbachia strain. This infertility was also associated with a greater biting rate. Here, we attempt to quantify the effect of this heightened biting behavior on the transmission potential of the dengue virus using a combination of assays for fitness, probing behavior, and vector competence, allowing repeat feeding, and incorporate these effects in a model of R0. We show that Wolbachia-infected infertile mosquitoes are more interested in feeding almost immediately after an initial blood meal relative to wild type and Wolbachia-infected fertile mosquitoes and that these differences continue for up to 8 days over the period we measured. As a result, the infertile Wolbachia mosquitoes have higher virus prevalence and loads than Wolbachia-fertile mosquitoes. We saw limited evidence of Wolbachia-mediated blocking in the disseminated tissue (legs) in terms of prevalence but did see reduced viral loads. Using a previously published estimate of the extrinsic incubation period, we demonstrate that the effect of repeat feeding/infertility is insufficient to overcome the effects of Wolbachia-mediated blocking on R0. These estimates are very conservative, however, and we posit that future studies should empirically measure EIP under a repeat feeding model. Our findings echo previous work where periods of extensive egg quiescence affected the reproductive success of Wolbachia-infected Ae. aegypti. Additionally, we show that increased biting behavior in association with this infertility in Wolbachia-infected mosquitoes may drive greater vector competence. These relationships require further exploration, given their ability to affect the success of field releases of Wolbachia for human disease reduction in drier climates where longer egg quiescence periods are expected.
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Affiliation(s)
- Meng-Jia Lau
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America
- The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Andrés R Valdez
- The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
- Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Matthew J Jones
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America
- The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Igor Aranson
- The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
- Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Ary A Hoffmann
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, Victoria, Australia
| | - Elizabeth A McGraw
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America
- The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America
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Aleyiydi MS, Alshiban NM, Alajmi AM, Alosaimi NF, Alotaibi M, Nassar MS, Alhumaid NK, Almangour TA, Memish ZA, Binjomah AZ, Algarni SM, Al-Jedai A, Almutairi AS, Shibl A, Tawfik EA. Epidemiology of Viral Infectious Diseases Reported in Saudi Arabia. Infect Dis Ther 2024:10.1007/s40121-024-01014-0. [PMID: 38967741 DOI: 10.1007/s40121-024-01014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Accepted: 06/24/2024] [Indexed: 07/06/2024] Open
Abstract
INTRODUCTION Efficient epidemiological monitoring of virus diseases is crucial in evaluating general public health, the prevalence of specific diseases, the pattern of spread, and implementing preventative and control strategies into action. METHODS This study analyzed data obtained from the Field Epidemiology Program (FETP) which is part of the Ministry of Health (MOH) in Saudi Arabia, which contained reported cases of infectious diseases over four years, from January 2018 to December 2021, to investigate and highlight the significant trend and incidence rate for each viral infectious disease. RESULTS Of the reported viral infectious diseases, hepatitis B and C, dengue fever (DF), influenza, chickenpox, and measles were the highest reported viral cases over four years. For the aforementioned diseases, males were often more susceptible to viral infections than females. Except for DF, this viral infection was more common in Saudi citizens. Viral illnesses like hand, foot, and mouth disease were less prevalent, while neurological viral disorders such as acute flaccid paralysis were rarely detected. There was an overall reduction in viral cases recorded during 2020-2021, which may be attributed to the implementation of preventive measures during the Coronavirus Disease 2019 (COVID-19) pandemic or an underreporting of cases during the lockdown of that time. CONCLUSION The prevalence of these common viral infections in the Saudi population suggests that understanding the mechanisms influencing changes in these viruses, methods of transmission, and the burden of these diseases is a priority for health policy. This understanding is necessary to develop effective intervention and preventive strategies.
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Affiliation(s)
- Munirah S Aleyiydi
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Noura M Alshiban
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Areej M Alajmi
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Nada F Alosaimi
- Wellness and Preventive Medicine Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Maryam Alotaibi
- Healthy Aging Research Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Majed S Nassar
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Nada K Alhumaid
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia
| | - Thamer A Almangour
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Ziad A Memish
- College of Medicine, Alfaisal University, 11533, Riyadh, Saudi Arabia
- Research & Innovation Center, King Saud Medical City, Riyadh, Saudi Arabia
- Hubert Department School of Public Health, Emory University, Atlanta, USA
- Division of Infectious Diseases, Kyung Hee University, Seoul, South Korea
| | - Abdulwahab Z Binjomah
- College of Medicine, Alfaisal University, 11533, Riyadh, Saudi Arabia
- Mycobacteriology Unit, Riyadh Regional Laboratory, Ministry of Health, 12746, Riyadh, Saudi Arabia
| | | | - Ahmed Al-Jedai
- College of Medicine, Alfaisal University, 11533, Riyadh, Saudi Arabia
- Therapeutic Affairs, Ministry of Health, 12631, Riyadh, Saudi Arabia
| | | | - Atef Shibl
- College of Medicine, Alfaisal University, 11533, Riyadh, Saudi Arabia
| | - Essam A Tawfik
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology (KACST), 11442, Riyadh, Saudi Arabia.
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3
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Alshiban NM, Aleyiydi MS, Nassar MS, Alhumaid NK, Almangour TA, Tawfik YM, Damiati LA, Almutairi AS, Tawfik EA. Epidemiologic and clinical updates on viral infections in Saudi Arabia. Saudi Pharm J 2024; 32:102126. [PMID: 38966679 PMCID: PMC11223122 DOI: 10.1016/j.jsps.2024.102126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024] Open
Abstract
In the past two decades, the world has witnessed devastating pandemics affecting the global healthcare infrastructure and disrupting society and the economy worldwide. Among all pathogens, viruses play a critical role that is associated with outbreaks due to their wide range of species, involvement of animal hosts, easily transmitted to humans, and increased rates of infectivity. Viral disease outbreaks threaten public health globally due to the challenges associated with controlling and eradicating them. Implementing effective viral disease control programs starts with ongoing surveillance data collection and analyses to detect infectious disease trends and patterns, which is critical for maintaining public health. Viral disease control strategies include improved hygiene and sanitation facilities, eliminating arthropod vectors, vaccinations, and quarantine. The Saudi Ministry of Health (MOH) and the Public Health Authority (also known as Weqayah) in Saudi Arabia are responsible for public health surveillance to control and prevent infectious diseases. The notifiable viral diseases based on the Saudi MOH include hepatitis diseases, viral hemorrhagic fevers, respiratory viral diseases, exanthematous viral diseases, neurological viral diseases, and conjunctivitis. Monitoring trends and detecting changes in these viral diseases is essential to provide proper interventions, evaluate the established prevention programs, and develop better prevention strategies. Therefore, this review aims to highlight the epidemiological updates of the recently reported viral infections in Saudi Arabia and to provide insights into the recent clinical treatment and prevention strategies.
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Affiliation(s)
- Noura M. Alshiban
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Munirah S. Aleyiydi
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Majed S. Nassar
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Nada K. Alhumaid
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Thamer A. Almangour
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Yahya M.K. Tawfik
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Laila A. Damiati
- Department of Biological Sciences, College of Science, University of Jeddah, Jeddah 23218, Saudi Arabia
| | | | - Essam A. Tawfik
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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Ross PA, Hoffmann AA. Revisiting Wolbachia detections: Old and new issues in Aedes aegypti mosquitoes and other insects. Ecol Evol 2024; 14:e11670. [PMID: 38957696 PMCID: PMC11219197 DOI: 10.1002/ece3.11670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/11/2024] [Accepted: 06/17/2024] [Indexed: 07/04/2024] Open
Abstract
Wolbachia continue to be reported in species previously thought to lack them, particularly Aedes aegypti mosquitoes. The presence of Wolbachia in this arbovirus vector is considered important because releases of mosquitoes with transinfected Wolbachia are being used around the world to suppress pathogen transmission and these efforts depend on a lack of Wolbachia in natural populations of this species. We previously assessed papers reporting Wolbachia in natural populations of Ae. aegypti and found little evidence that seemed convincing. However, since our review, more and more papers are emerging on Wolbachia detections in this species. Our purpose here is to evaluate these papers within the context of criteria we previously established but also new criteria that include the absence of releases of transinfections within the local areas being sampled which has contaminated natural populations in at least one case where novel detections have been reported. We also address the broader issue of Wolbachia detection in other insects where similar issues may arise which can affect overall estimates of this endosymbiont more generally. We note continuing shortcomings in papers purporting to find natural Wolbachia in Ae. aegypti which are applicable to other insects as well.
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Affiliation(s)
- Perran A. Ross
- Pest and Environmental Adaptation Research Group, School of BioSciences, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
| | - Ary A. Hoffmann
- Pest and Environmental Adaptation Research Group, School of BioSciences, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
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Hague MTJ, Wheeler TB, Cooper BS. Comparative analysis of Wolbachia maternal transmission and localization in host ovaries. Commun Biol 2024; 7:727. [PMID: 38877196 PMCID: PMC11178894 DOI: 10.1038/s42003-024-06431-y] [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: 02/17/2024] [Accepted: 06/07/2024] [Indexed: 06/16/2024] Open
Abstract
Many insects and other animals carry microbial endosymbionts that influence their reproduction and fitness. These relationships only persist if endosymbionts are reliably transmitted from one host generation to the next. Wolbachia are maternally transmitted endosymbionts found in most insect species, but transmission rates can vary across environments. Maternal transmission of wMel Wolbachia depends on temperature in natural Drosophila melanogaster hosts and in transinfected Aedes aegypti, where wMel is used to block pathogens that cause human disease. In D. melanogaster, wMel transmission declines in the cold as Wolbachia become less abundant in host ovaries and at the posterior pole plasm (the site of germline formation) in mature oocytes. Here, we assess how temperature affects maternal transmission and underlying patterns of Wolbachia localization across 10 Wolbachia strains diverged up to 50 million years-including strains closely related to wMel-and their natural Drosophila hosts. Many Wolbachia maintain high transmission rates across temperatures, despite highly variable (and sometimes low) levels of Wolbachia in the ovaries and at the developing germline in late-stage oocytes. Identifying strains like closely related wMel-like Wolbachia with stable transmission across variable environmental conditions may improve the efficacy of Wolbachia-based biocontrol efforts as they expand into globally diverse environments.
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Affiliation(s)
| | - Timothy B Wheeler
- Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Brandon S Cooper
- Division of Biological Sciences, University of Montana, Missoula, MT, USA
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Hague MT, Wheeler TB, Cooper BS. Comparative analysis of Wolbachia maternal transmission and localization in host ovaries. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.03.583170. [PMID: 38496649 PMCID: PMC10942406 DOI: 10.1101/2024.03.03.583170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Many insects and other animals carry microbial endosymbionts that influence their reproduction and fitness. These relationships only persist if endosymbionts are reliably transmitted from one host generation to the next. Wolbachia are maternally transmitted endosymbionts found in most insect species, but transmission rates can vary across environments. Maternal transmission of wMel Wolbachia depends on temperature in natural Drosophila melanogaster hosts and in transinfected Aedes aegypti, where wMel is used to block pathogens that cause human disease. In D. melanogaster, wMel transmission declines in the cold as Wolbachia become less abundant in host ovaries and at the posterior pole plasm (the site of germline formation) in mature oocytes. Here, we assess how temperature affects maternal transmission and underlying patterns of Wolbachia localization across 10 Wolbachia strains diverged up to 50 million years-including strains closely related to wMel-and their natural Drosophila hosts. Many Wolbachia maintain high transmission rates across temperatures, despite highly variable (and sometimes low) levels of Wolbachia in the ovaries and at the developing germline in late-stage oocytes. Identifying strains like closely related wMel-like Wolbachia with stable transmission across variable environmental conditions may improve the efficacy of Wolbachia-based biocontrol efforts as they expand into globally diverse environments.
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Affiliation(s)
| | - Timothy B. Wheeler
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Brandon S. Cooper
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
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7
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Maciel-de-Freitas R, Sauer FG, Kliemke K, Garcia GA, Pavan MG, David MR, Schmidt-Chanasit J, Hoffmann A, Lühken R. Wolbachia strains wMel and wAlbB differentially affect Aedes aegypti traits related to fecundity. Microbiol Spectr 2024; 12:e0012824. [PMID: 38483475 PMCID: PMC10986601 DOI: 10.1128/spectrum.00128-24] [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: 01/17/2024] [Accepted: 03/01/2024] [Indexed: 04/06/2024] Open
Abstract
Two Wolbachia strains, wMel and wAlbB, have been transinfected into Aedes aegypti mosquitoes for population replacement with the aim of reducing dengue transmission. Epidemiological data from various endemic sites suggest a pronounced decrease in dengue transmission after implementing this strategy. In this study, we investigated the impact of the Wolbachia strains wMel and wAlbB on Ae. aegypti fitness in a common genetic background. We found that Ae. aegypti females infected with the wMel strain exhibited several significant differences compared with those infected with the wAlbB strain. Specifically, wMel-infected females laid significantly fewer eggs, ingested a lower amount of blood, had a reduced egg production rate, and exhibited a decreased Wolbachia density at a later age compared with mosquitoes infected with the wAlbB strain. Conversely, the wAlbB strain showed only mild negative effects when compared with Wolbachia-uninfected specimens. These differential effects on Ae. aegypti fitness following infection with either wMel or wAlbB may have important implications for the success of population replacement strategies in invading native Ae. aegypti populations in endemic settings. Further research is needed to better understand the underlying mechanisms responsible for these differences in fitness effects and their potential impact on the long-term efficacy of Wolbachia-based dengue control programs.IMPORTANCEThe transmission of arboviruses such as dengue, Zika, and chikungunya is on the rise globally. Among the most promising strategies to reduce arbovirus burden is the release of one out of two strains of Wolbachia-infected Aedes aegypti: wMel and wAlbB. One critical aspect of whether this approach will succeed involves the fitness cost of either Wolbachia strains on mosquito life history traits. For instance, we found that wMel-infected Ae. aegypti females laid significantly fewer eggs, ingested a lower amount of blood, had a reduced egg production rate, and exhibited a decreased Wolbachia density at a later age compared with mosquitoes infected with the wAlbB strain. Conversely, the wAlbB strain showed only mild negative effects when compared with Wolbachia-uninfected specimens. These differential effects on mosquito fitness following infection with either wMel or wAlbB may have important implications for the success of population replacement strategies in invading native Ae. aegypti populations.
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Affiliation(s)
- Rafael Maciel-de-Freitas
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felix G. Sauer
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | | | - Gabriela A. Garcia
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Márcio G. Pavan
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Mariana R. David
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Jonas Schmidt-Chanasit
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- Faculty of Mathematics, Informatics and Natural Sciences, University of Hamburg, Hamburg, Germany
| | - Ary Hoffmann
- Pest and Environmental Adaptation Research Group, School of BioSciences, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Renke Lühken
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
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Mancini MV, Murdochy SM, Bilgo E, Ant TH, Gingell D, Gnambani EJ, Failloux AB, Diabate A, Sinkins SP. Wolbachia strain wAlbB shows favourable characteristics for dengue control use in Aedes aegypti from Burkina Faso. Environ Microbiol 2024; 26:e16588. [PMID: 38450576 DOI: 10.1111/1462-2920.16588] [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: 09/14/2023] [Accepted: 01/23/2024] [Indexed: 03/08/2024]
Abstract
Dengue represents an increasing public health burden worldwide. In Africa, underreporting and misdiagnosis often mask its true epidemiology, and dengue is likely to be both more widespread than reported data suggest and increasing in incidence and distribution. Wolbachia-based dengue control is underway in Asia and the Americas but has not to date been deployed in Africa. Due to the genetic heterogeneity of African Aedes aegypti populations and the complexity of the host-symbiont interactions, characterization of key parameters of Wolbachia-carrying mosquitoes is paramount for determining the potential of the system as a control tool for dengue in Africa. The wAlbB Wolbachia strain was stably introduced into an African Ae. aegypti population by introgression, and showed high intracellular density in whole bodies and different mosquito tissues; high intracellular density was also maintained following larval rearing at high temperatures. No effect on the adult lifespan induced by Wolbachia presence was detected. Moreover, the ability of this strain to strongly inhibit DENV-2 dissemination and transmission in the host was also demonstrated in the African background. Our findings suggest the potential of harnessing Wolbachia for dengue control for African populations of Ae. aegypti.
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Affiliation(s)
- Maria Vittoria Mancini
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
- Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | | | - Etienne Bilgo
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Dioulasso, Burkina Faso
- Institut National de Santé Publique/Centre Muraz, Dioulasso, Burkina Faso
| | - Thomas H Ant
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - Daniel Gingell
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - Edounou Jacques Gnambani
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Dioulasso, Burkina Faso
- Institut National de Santé Publique/Centre Muraz, Dioulasso, Burkina Faso
| | - Anna-Bella Failloux
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors Unit, Paris, France
| | - Abdoulaye Diabate
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Dioulasso, Burkina Faso
- Institut National de Santé Publique/Centre Muraz, Dioulasso, Burkina Faso
| | - Steven P Sinkins
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
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Hoffmann AA, Ahmad NW, Keong WM, Ling CY, Ahmad NA, Golding N, Tierney N, Jelip J, Putit PW, Mokhtar N, Sandhu SS, Ming LS, Khairuddin K, Denim K, Rosli NM, Shahar H, Omar T, Ridhuan Ghazali MK, Aqmar Mohd Zabari NZ, Abdul Karim MA, Saidin MI, Mohd Nasir MN, Aris T, Sinkins SP. Introduction of Aedes aegypti mosquitoes carrying wAlbB Wolbachia sharply decreases dengue incidence in disease hotspots. iScience 2024; 27:108942. [PMID: 38327789 PMCID: PMC10847733 DOI: 10.1016/j.isci.2024.108942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/22/2023] [Accepted: 01/15/2024] [Indexed: 02/09/2024] Open
Abstract
Partial replacement of resident Aedes aegypti mosquitoes with introduced mosquitoes carrying certain strains of inherited Wolbachia symbionts can result in transmission blocking of dengue and other viruses of public health importance. Wolbachia strain wAlbB is an effective transmission blocker and stable at high temperatures, making it particularly suitable for hot tropical climates. Following trial field releases in Malaysia, releases using wAlbB Ae. aegypti have become operationalized by the Malaysian health authorities. We report here on an average reduction in dengue fever of 62.4% (confidence intervals 50-71%) in 20 releases sites when compared to 76 control sites in high-rise residential areas. Importantly the level of dengue reduction increased with Wolbachia frequency, with 75.8% reduction (61-87%) estimated at 100% Wolbachia frequency. These findings indicate large impacts of wAlbB Wolbachia invasions on dengue fever incidence in an operational setting, with incidence expected to further decrease as wider areas are invaded.
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Affiliation(s)
- Ary A. Hoffmann
- Pest and Environmental Research Group, School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Nazni Wasi Ahmad
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Wan Ming Keong
- Vector Borne Disease Control Section, Disease Control Division, Ministry of Health Malaysia, Complex E, Block E10, Persiaran Sultan Sallahuddin Abdul Aziz Shah, Presint 1, Putrajaya 62000, Malaysia
| | - Cheong Yoon Ling
- Biomedical Museum Unit, Special Resource Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Noor Afizah Ahmad
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Nick Golding
- Telethon Kids Institute, Perth Children’s Hospital, Nedlands, WA 6009, Australia
- Curtin School of Population Health, Curtin University, Bentley, WA 6845, Australia
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC 3052, Australia
| | - Nicholas Tierney
- Telethon Kids Institute, Perth Children’s Hospital, Nedlands, WA 6009, Australia
- Curtin School of Population Health, Curtin University, Bentley, WA 6845, Australia
| | - Jenarun Jelip
- Vector Borne Disease Control Section, Disease Control Division, Ministry of Health Malaysia, Complex E, Block E10, Persiaran Sultan Sallahuddin Abdul Aziz Shah, Presint 1, Putrajaya 62000, Malaysia
| | - Perada Wilson Putit
- Vector Borne Disease Control Section, Disease Control Division, Ministry of Health Malaysia, Complex E, Block E10, Persiaran Sultan Sallahuddin Abdul Aziz Shah, Presint 1, Putrajaya 62000, Malaysia
| | - Norhayati Mokhtar
- Vector Borne Disease Control Section, Disease Control Division, Ministry of Health Malaysia, Complex E, Block E10, Persiaran Sultan Sallahuddin Abdul Aziz Shah, Presint 1, Putrajaya 62000, Malaysia
| | - Sukhvinder Singh Sandhu
- Petaling District Health Office, Ministry of Health Malaysia, SS 6, Petaling Jaya 47301, Selangor, Malaysia
| | - Lau Sai Ming
- Petaling District Health Office, Ministry of Health Malaysia, SS 6, Petaling Jaya 47301, Selangor, Malaysia
| | - Khadijah Khairuddin
- Petaling District Health Office, Ministry of Health Malaysia, SS 6, Petaling Jaya 47301, Selangor, Malaysia
| | - Kamilan Denim
- Vector Borne Disease Control Section, Disease Control Division, Ministry of Health Malaysia, Complex E, Block E10, Persiaran Sultan Sallahuddin Abdul Aziz Shah, Presint 1, Putrajaya 62000, Malaysia
| | - Norazman Mohd Rosli
- Health Department of Federal Territory of Kuala Lumpur & Putrajaya, Jalan Cenderasari, Kuala Lumpur 50590, Malaysia
| | - Hanipah Shahar
- Health Department of Federal Territory of Kuala Lumpur & Putrajaya, Jalan Cenderasari, Kuala Lumpur 50590, Malaysia
| | - Topek Omar
- Health Department of Federal Territory of Kuala Lumpur & Putrajaya, Jalan Cenderasari, Kuala Lumpur 50590, Malaysia
| | - Muhammad Kamarul Ridhuan Ghazali
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Nur Zatil Aqmar Mohd Zabari
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Mohd Arif Abdul Karim
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Mohamad Irwan Saidin
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Muhammad Nizam Mohd Nasir
- Medical Entomology Unit, Infectious Disease Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur 50588, Malaysia
| | - Tahir Aris
- Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, Jalan Setia Murni U13/52, Seksyen U13, Shah Alam 40170, Selangor, Malaysia
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10
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Thia JA, Endersby-Harshman N, Collier S, Nassar MS, Tawfik EA, Alfageeh MB, Elfekih S, Hoffmann AA. Mitochondrial DNA variation in Aedes aegypti (Diptera: Culicidae) mosquitoes from Jeddah, Saudi Arabia. JOURNAL OF MEDICAL ENTOMOLOGY 2024; 61:250-256. [PMID: 37738428 PMCID: PMC10784777 DOI: 10.1093/jme/tjad131] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/24/2023] [Accepted: 09/04/2023] [Indexed: 09/24/2023]
Abstract
Wolbachia (Hertig 1936) (Rickettsiales: Ehrlichiaceae) has emerged as a valuable biocontrol tool in the fight against dengue by suppressing the transmission of the virus through mosquitoes. Monitoring the dynamics of Wolbachia is crucial for evaluating the effectiveness of release programs. Mitochondrial (mtDNA) markers serve as important tools for molecular tracking of infected mitochondrial backgrounds over time but require an understanding of the variation in release sites. In this study, we investigated the mitochondrial lineages of Aedes aegypti (Linnaeus 1762) in Jeddah, Saudi Arabia, which is a prospective release site for the "wAlbBQ" Wolbachia-infected strain of this mosquito species. We employed a combination of comprehensive mitogenomic analysis (including all protein-coding genes) and mtDNA marker analysis (cox1 and nad5) using data collected from Jeddah. We combined our mitogenome and mtDNA marker data with those from previous studies to place mitochondrial variation in Saudi Arabia into a broader global context. Our findings revealed the presence of 4 subclades that can be broadly categorized into 2 major mitochondrial lineages. Ae. aegypti mosquitoes from Jeddah belonged to both major lineages. Whilst mitogenomic data offered a higher resolution for distinguishing Jeddah mosquitoes from the wAlbBQ strain, the combination of cox1 and nad5 mtDNA markers alone proved to be sufficient. This study provides the first important characterization of Ae. aegypti mitochondrial lineages in Saudi Arabia and offers essential baseline information for planning future molecular monitoring efforts during the release of Wolbachia-infected mosquitoes.
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Affiliation(s)
- Joshua A Thia
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, VIC, Australia
| | - Nancy Endersby-Harshman
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, VIC, Australia
| | - Sophie Collier
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, VIC, Australia
| | - Majed S Nassar
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
| | - Essam A Tawfik
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
| | - Mohamed B Alfageeh
- Advanced Diagnostics and Therapeutics Institute, Health Sector, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
| | - Samia Elfekih
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, VIC, Australia
- CSIRO Health and Biosecurity, Australian Centre for Disease Preparedness (ACDP), Geelong, VIC, Australia
| | - Ary A Hoffmann
- Pest and Environmental Adaptation Research Group, Bio21 Institute and The School of Biosciences, University of Melbourne, Parkville, VIC, Australia
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11
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Vásquez VN, Kueppers LM, Rašić G, Marshall JM. wMel replacement of dengue-competent mosquitoes is robust to near-term change. NATURE CLIMATE CHANGE 2023; 13:848-855. [PMID: 37546688 PMCID: PMC10403361 DOI: 10.1038/s41558-023-01746-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 06/23/2023] [Indexed: 08/08/2023]
Abstract
Rising temperatures are impacting the range and prevalence of mosquito-borne diseases. A promising biocontrol technology replaces wild mosquitoes with those carrying the virus-blocking Wolbachia bacterium. Because the most widely used strain, wMel, is adversely affected by heat stress, we examined how global warming may influence wMel-based replacement. We simulated interventions in two locations with successful field trials using Coupled Model Intercomparison Project Phase 5 climate projections and historical temperature records, integrating empirical data on wMel's thermal sensitivity into a model of Aedes aegypti population dynamics to evaluate introgression and persistence over one year. We show that in Cairns, Australia, climatic futures necessitate operational adaptations for heatwaves exceeding two weeks. In Nha Trang, Vietnam, projected heatwaves of three weeks and longer eliminate wMel under the most stringent assumptions of that symbiont's thermal limits. We conclude that this technology is generally robust to near-term (2030s) climate change. Accelerated warming may challenge this in the 2050s and beyond.
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Affiliation(s)
- Váleri N. Vásquez
- Energy and Resources Group, University of California, Berkeley, CA USA
- Department of Electrical Engineering and Computer Sciences, College of Engineering, University of California, Berkeley, CA USA
| | - Lara M. Kueppers
- Energy and Resources Group, University of California, Berkeley, CA USA
- Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Gordana Rašić
- Mosquito Genomics, QIMR Berghofer Medical Research Institute, Brisbane, Queensland Australia
| | - John M. Marshall
- Divisions of Epidemiology and Biostatistics, School of Public Health, University of California, Berkeley, CA USA
- Innovative Genomics Institute, University of California, Berkeley, CA USA
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