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Neto JFDN, Roque RA, Ferreira FADS, Rabelo MX, Marques JA, Guimaraes JM, Vasconcelos ADS, Tavares CPDS, Barros JC, Da Silva BFO, Tadei WP, Val AL. Morphological changes in eggs and embryos of Aedes aegypti (Diptera: Culicidae) exposed to predicted climatic scenarios for the year 2100 in the Central Amazon. Acta Trop 2024; 258:107328. [PMID: 39032849 DOI: 10.1016/j.actatropica.2024.107328] [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: 05/28/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/23/2024]
Abstract
According to the IPCC, by the year 2100, rises in global temperature could reach up to 5 °C above current averages. On a planet-wide scale, this is one of the effects of climate changes that could have repercussions on the biological cycle of Aedes aegypti, the main arbovirus vector in urban environments and a transmitter of the arboviruses that cause dengue, Zika, chikungunya and urban yellow fever. The objective of this study was to evaluate morphological changes in Ae. aegypti eggs and embryos maintained in a climate change simulator. For this, specimens obtained from an insectarium were kept in four chambers that simulated the range of environmental scenarios predicted by the IPCC for the year 2100. The eggs obtained from each room were collected and transported to the laboratory for morphometric and morphological analysis, using confocal and scanning microscopy. Aedes aegypti eggs (n=20) were used to obtain the following variables: total width, total length, length-width ratio and diameter of the micropylar disc. Additionally, 20 embryos were used to obtain the data on head capsule length, width and length-width ratio. The data were subjected to a normality test and the means of each variable were compared using ANOVA and Tukey's post-hoc test, considering (p ≤ 0.05). A significant reduction (p < 0.05) was observed mainly in the mean lengths under the current-extreme scenario (587.5 and 553.6 μm, respectively), as well as in the widths under the current-mild scenario (171 and 158.4 μm, respectively). The length of the cephalic capsule was also affected, showing significant differences in the means under the current-intermediate scenario (189.5 and 208.5 μm, respectively), as well as in the widths between the current-intermediate scenarios (173.7 and 194.9 μm, respectively). The results suggest significant changes in the morphometry of Ae. aegypti eggs and embryos as a result of the climatic influences to which the adults were subjected, which may have an impact on vector population density and, consequently, on arbovirus dynamics in urban environments.
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Affiliation(s)
- Joaquim Ferreira do Nascimento Neto
- Laboratório de Ecofisiologia e Evolução Molecular - LEEM, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil; Laboratório de Malária e Dengue - LMD, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil; Programa de Pós-graduação em Genética, Conservação e Biologia Evolutiva - GCBEv, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil.
| | - Rosemary Aparecida Roque
- Laboratório de Malária e Dengue - LMD, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil
| | | | - Marjory Ximenes Rabelo
- Centro Multiusuário para Análise de Fenômenos Biomédicos - CMABio; Universidade do Estado do Amazonas - UEA; Manaus, Amazonas, Brasil
| | - Jéssica Araújo Marques
- Centro Multiusuário para Análise de Fenômenos Biomédicos - CMABio; Universidade do Estado do Amazonas - UEA; Manaus, Amazonas, Brasil
| | - Jander Matos Guimaraes
- Centro Multiusuário para Análise de Fenômenos Biomédicos - CMABio; Universidade do Estado do Amazonas - UEA; Manaus, Amazonas, Brasil
| | - Aldenora Dos Santos Vasconcelos
- Centro Multiusuário para Análise de Fenômenos Biomédicos - CMABio; Universidade do Estado do Amazonas - UEA; Manaus, Amazonas, Brasil; Programa de Pós-graduação em Biotecnologia - PPG Biotec, Universidade do Federal do Amazonas - UFAM, Manaus, Amazonas, Brasil
| | | | - Jessica Cavalcante Barros
- Laboratório de Malária e Dengue - LMD, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil
| | - Bruna Felipe Olavo Da Silva
- Laboratório de Malária e Dengue - LMD, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil
| | - Wanderli Pedro Tadei
- Laboratório de Malária e Dengue - LMD, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil
| | - Adalberto Luis Val
- Laboratório de Ecofisiologia e Evolução Molecular - LEEM, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Amazonas, Brasil
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Nik Abdull Halim NMH, Mohd Jamili AF, Che Dom N, Abd Rahman NH, Jamal Kareem Z, Dapari R. The impact of radiofrequency exposure on Aedes aegypti (Diptera: Culicidae) development. PLoS One 2024; 19:e0298738. [PMID: 38412167 PMCID: PMC10898727 DOI: 10.1371/journal.pone.0298738] [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: 11/04/2023] [Accepted: 01/29/2024] [Indexed: 02/29/2024] Open
Abstract
INTRODUCTION Wireless communication connects billions of people worldwide, relying on radiofrequency electromagnetic fields (RF-EMF). Generally, fifth-generation (5G) networks shift RF carriers to higher frequencies. Although radio, cell phones, and television have benefitted humans for decades, higher carrier frequencies can present potential health risks. Insects closely associated with humans (such as mosquitoes) can undergo increased RF absorption and dielectric heating. This process inadvertently impacts the insects' behaviour, morphology, and physiology, which can influence their spread. Therefore, this study examined the impact of RF exposure on Ae. aegypti mosquitoes, which are prevalent in indoor environments with higher RF exposure risk. The morphologies of Ae. aegypti eggs and their developments into Ae. aegypti mosquitoes were investigated. METHODS A total of 30 eggs were exposed to RF radiation at three frequencies: baseline, 900 MHz, and 18 GHz. Each frequency was tested in triplicate. Several parameters were assessed through daily observations in an insectarium, including hatching responses, development times, larval numbers, and pupation periods until the emergence of adult insects. RESULTS This study revealed that the hatching rate for the 900 MHz group was the highest (79 ± 10.54%) compared to other exposures (p = 0.87). The adult emergence rate for the 900 MHz group was also the lowest at 33 ± 2.77%. A significant difference between the groups was demonstrated in the statistical analysis (p = 0.03). CONCLUSION This work highlighted the morphology sensitivity of Ae. aegypti eggs and their developments in the aquatic phase to RF radiation, potentially altering their life cycle.
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Affiliation(s)
- Nik Muhammad Hanif Nik Abdull Halim
- Centre of Environmental Health & Safety, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Selangor, Malaysia
- Integrated Mosquito Research Group (I-MeRGe), Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Selangor, Malaysia
| | - Alya Farzana Mohd Jamili
- Centre of Environmental Health & Safety, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Selangor, Malaysia
| | - Nazri Che Dom
- Centre of Environmental Health & Safety, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Selangor, Malaysia
- Institute for Biodiversity and Sustainable Development (IBSD), Universiti Teknologi MARA, Shah Alam, Malaysia
- Setiu District Health Office, Permaisuri, Terengganu, Malaysia
| | - Nurul Huda Abd Rahman
- Antenna Research Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
| | - Zana Jamal Kareem
- Faculty of Health Sciences, Qaiwan International University, Sulaymaniyah, Iraq
- Kurdistan Institution for Strategic Studies and Scientific Research (KISSR), Sulaymaniyah, Iraq
| | - Rahmat Dapari
- Department of Community Health, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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Nik Abdull Halim NMH, Che Dom N, Dapari R, Salim H, Precha N. A systematic review and meta-analysis of the effects of temperature on the development and survival of the Aedes mosquito. Front Public Health 2022; 10:1074028. [PMID: 36600940 PMCID: PMC9806355 DOI: 10.3389/fpubh.2022.1074028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
Introduction The Aedes mosquito species, which are the vectors for the transmission of the dengue virus (DENV) to humans, are becoming increasingly susceptible to the formidable effects of influential factors, especially temperature. However, there are still very few studies that have systematically reviewed the existing literature. Hence, in the present study, a systematic literature review and meta-analysis was conducted into the effects of temperature on dengue vectors. Method Several research methodologies were incorporated into the current study, and a review was carried out using PRISMA as a guide. The publications for this study were chosen from two prominent databases, Scopus and Web of Science. All of the studies were assessed, reviewed, and evaluated independently by two reviewers. The meta-analysis tool, Review Manager (RevMan Copenhagen Version 5.4.1), was used to record the extracted data for the meta-analysis. Moran's I 2 and a funnel plot were utilized to measure heterogeneity, and publication bias was investigated. A 95% confidence interval (CI) and overall risk difference (RD) were estimated using a random-effects model. Result and discussion As a consequence of the search efforts, a total of 46 articles were selected for inclusion in the systematic review and meta-analysis. This review was divided into five major themes, based on a thematic analysis: (i) hatching rate, (ii) development time, (iii) longevity, (iv) survival rate, and (v) wing morphology. In addition, the development time, survival rate, and wing morphology revealed significantly higher risk differences between the maximum and minimum temperatures (RD: 0.26, 95% CI: 0.16, 0.36; p = < 0.00001; RD: 0.10, 95% CI: 0.05, 0.14; p < 0.0001; and RD: 0.07, 95% CI: 0.02, 0.12; p = 0.006, respectively). This study makes several substantial contributions to the body of knowledge and to practical applications. Finally, a number of recommendations are made at the conclusion of this research for the future reference of researchers.
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Affiliation(s)
- Nik Muhammad Hanif Nik Abdull Halim
- Centre of Environmental Health & Safety, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Malaysia,Setiu District Health Office, Setiu, Malaysia
| | - Nazri Che Dom
- Centre of Environmental Health & Safety, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Malaysia,Integrated Mosquito Research Group (I-MeRGe), Universiti Teknologi MARA (UiTM), UITM Cawangan Selangor, Puncak Alam, Malaysia,Institute for Biodiversity and Sustainable Development (IBSD), Universiti Teknologi MARA, Shah Alam, Malaysia,*Correspondence: Nazri Che Dom
| | - Rahmat Dapari
- Department of Community Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Hasber Salim
- School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Nopadol Precha
- Department of Environmental Health and Technology, School of Public Health, Walailak University, Nakhon Si Thammarat, Thailand
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Costa LNP, Novais S, Oki Y, Fernandes GW, Borges MAZ. Mosquito (Diptera: Culicidae) diversity along a rainy season and edge effects in a riparian forest in Southeastern Brazil. AUSTRAL ECOL 2022. [DOI: 10.1111/aec.13250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lêda Naiara Pereira Costa
- Laboratório de Ecologia e Controle Biológico de Insetos, Departamento de Biologia Geral Universidade Estadual de Montes Claros Vila Mauriceia Montes Claros, Minas Gerais Brazil
| | - Samuel Novais
- Red de Interacciones Multitróficas Instituto de Ecología A.C. Xalapa, Veracruz Mexico
| | - Yumi Oki
- Laboratório de Ecologia Evolutiva e Biodiversidade Departamento de Genética, Ecologia e Evolução Universidade Federal de Minas Gerais Belo Horizonte, Minas Gerais Brazil
| | - G. Wilson Fernandes
- Laboratório de Ecologia Evolutiva e Biodiversidade Departamento de Genética, Ecologia e Evolução Universidade Federal de Minas Gerais Belo Horizonte, Minas Gerais Brazil
| | - Magno Augusto Zazá Borges
- Laboratório de Ecologia e Controle Biológico de Insetos, Departamento de Biologia Geral Universidade Estadual de Montes Claros Vila Mauriceia Montes Claros, Minas Gerais Brazil
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Cui G, Zhong S, Zheng T, Li Z, Zhang X, Li C, Hemming-Schroeder E, Zhou G, Li Y. Aedes albopictus life table: environment, food, and age dependence survivorship and reproduction in a tropical area. Parasit Vectors 2021; 14:568. [PMID: 34743753 PMCID: PMC8573987 DOI: 10.1186/s13071-021-05081-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 10/26/2021] [Indexed: 11/29/2022] Open
Abstract
Background Environmental conditions affect the biology of mosquito vectors. Aedes albopictus is a major vector of many important diseases including dengue, Zika, and chikungunya in China. Understanding the development, fecundity, and survivorship of Ae. albopictus mosquitoes in different environmental conditions is beneficial for the implementation of effective vector control measures. Methods Aedes albopictus larval and adult life-table experiments were conducted under natural conditions in indoor, half-shaded, and fully shaded settings, simulating the three major habitat types in Hainan Province, a tropical island in the South China Sea. Temperature, humidity, and light intensity were recorded daily. Larval rearing used habitat water and tap water, with and without additional artificial food. Development time, survivorship, pupation rate, and adult emergence rates were monitored. Adult mosquito survivorship and fecundity were monitored daily and reproductive rates were determined, and age-dependent survivorship and reproduction were analyzed. Results The pupation time and male and female emergence times were significantly shorter in indoor conditions than in shaded and half-shaded conditions for both tap water with added food and habitat water with added food groups. For habitat water with added food, the shaded environment had the lowest pupation rate among the settings. For tap water with added food group, the shaded environment had the lowest pupation rate. The mean survival time of females was 27.3 ± 0.8 days in the indoor condition, which was significantly longer than that in the half-shaded (18.4 ± 0.6 days) and shaded (13.8 ± 1.2 days) conditions. Adult mortality was age-dependent, and the rate of change in mortality with age was not significantly different among different environmental conditions. The mean net replacement rate (R0) of female mosquitoes showed no significant difference among the three conditions, whereas the per capita intrinsic growth rate (r) in the shaded condition was 42.0% and 20.4% higher than that in the indoor and half-shaded conditions, respectively. Female daily egg mass was also age-dependent in all the settings, decaying exponentially with age. Conclusions Our results imply that half-shaded conditions are likely the best natural condition for adult emergence and female reproduction, and food supply is crucial for larval development and pupation. The results provide new avenues for integrated mosquito management in indoor and outdoor areas, especially in half-shaded areas. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-021-05081-x.
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Affiliation(s)
- Guzhen Cui
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, China.,Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Science, Guizhou Medical University, Guiyang, 550025, China
| | - Saifeng Zhong
- Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China
| | - Tuquan Zheng
- Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China
| | - Zhangrui Li
- Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China
| | - Xu Zhang
- Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China
| | - Chuang Li
- Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China
| | - Elizabeth Hemming-Schroeder
- Program in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92617, USA
| | - Guofa Zhou
- Program in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92617, USA.
| | - Yiji Li
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, China. .,Department of Pathogen Biology, Hainan Medical University, Haikou, 571199, China. .,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, 571199, China.
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