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Kobayashi D, Kai I, Faizah AN, Moi ML, Tajima S, Takasaki T, Sasaki T, Isawa H. Comparative analysis of the susceptibility of Aedes aegypti and Japanese Aedes albopictus to all dengue virus serotypes. Trop Med Health 2023; 51:61. [PMID: 37919794 PMCID: PMC10621184 DOI: 10.1186/s41182-023-00553-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 10/22/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND Dengue fever, caused by the dengue virus (DENV), is the most common viral infection transmitted by Aedes mosquitoes (mainly Ae. aegypti and Ae. albopictus) worldwide. Aedes aegypti is not currently established in Japan, and Ae. albopictus is the primary vector mosquito for DENV in the country, but knowledge of its viral susceptibility is limited. Therefore, we aimed to clarify the status of DENV susceptibility by comparing the infection and dissemination dynamics of Japanese Ae. albopictus to all known DENV serotypes with those of Ae. aegypti. METHODS After propagation of each DENV serotype in Vero cells, the culture supernatants were mixed with defibrinated rabbit blood and adenosine triphosphate, and the mixture was artificially blood-sucked by two colonies of Ae. albopictus from Japan and one colony of Ae. aegypti from a dengue-endemic country (Vietnam). After 14 days of sucking, the mosquito body was divided into two parts (thorax/abdomen and head/wings/legs) and total RNA was extracted from each sample. DENV RNA was detected in these extracted RNA samples using a quantitative RT-PCR method specific for each DENV serotype, and infection and dissemination rates were analyzed. RESULTS The Japanese Ae. albopictus colonies were susceptible to all DENV serotypes. Its infection and dissemination rates were significantly lower than those of Ae. aegypti. However, the number of DENV RNA copies in Ae. albopictus was almost not significantly different from that in Ae. aegypti. Furthermore, Japanese Ae. albopictus differed widely in their susceptibility to each DENV serotype. CONCLUSIONS In Japanese Ae. albopictus, once DENV overcame the midgut infection barrier, the efficiency of subsequent propagation and dissemination of the virus in the mosquito body was comparable to that of Ae. aegypti. Based on the results of this study and previous dengue outbreak trends, Ae. albopictus is predicted to be highly compatible with DENV-1, suggesting that this serotype poses a high risk for future epidemics in Japan.
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Affiliation(s)
- Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo, Japan.
- Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, Tokyo, Japan.
| | - Izumi Kai
- Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo, Japan
- Graduate School of Agriculture, Meiji University, Kanagawa, Japan
| | - Astri Nur Faizah
- Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Meng Ling Moi
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shigeru Tajima
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
- BML, Inc., Tokyo, Japan
| | - Toshinori Sasaki
- Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo, Japan
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Bega AG, Vu T, Goryacheva II, Moskaev AV, Andrianov BV. A Barcoding and Morphological Identification of Mosquito Species of the Genus Aedes (Diptera: Culicidae) of the Russian Far East and Northern Vietnam. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422030024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Isa I, Ndams IS, Aminu M, Chechet G, Dotzauer A, Simon AY. Genetic diversity of Dengue virus serotypes circulating among Aedes mosquitoes in selected regions of northeastern Nigeria. One Health 2021; 13:100348. [PMID: 34825044 PMCID: PMC8605110 DOI: 10.1016/j.onehlt.2021.100348] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 11/07/2022] Open
Abstract
The flaviviruses are mosquito borne pathogens that continue to pose a considerable public health risk to animals and humans. The members of this group includes, Dengue virus (DENV), Yellow fever virus (YVF), Japanese encephalitis virus (JEV), West Nile virus (WEV) and Zika virus (ZKV). The DENV mosquito vector is endemic to tropical and subtropical climates, placing ∼40% of the world's population at direct risk of dengue infection. Currently, in Nigeria the status of DENV serotypes circulating among mosquito vectors is unknown. Our study was designed to identify and characterize the DENV serotypes circulating in Aedes mosquito populations collected in selected sites in Nigeria. The mosquitoes were collected and identified morphologically to species level using colored identification keys of Rueda. Generally, each species identified was tested in pools of 20 individuals of each Aedes species. RT-PCR and semi nested PCR were used to detect DENV serotypes in mosquitoes and characterized using Sanger sequencing methods. The results showed that DENV serotypes were detected in 58.54% (24/41) of the pools of Aedes mosquitoes from Mubi, Numan and Yola screened. All DENV1-4 serotypes were detected in Ae. aegypti. While DENV 1, 2 and 4 were detected in Ae. albopictus. And only DENV 2 was detected in Ae. galloisi with DENV4 serotype being reported for the first time in Nigeria. DENV2 (37.8%) was the most detected serotypes, while double and triple co-infections of serotypes were detected in 24.4% of the pools. Phylogenetic analysis revealed a strong evolutionary relatedness of DENV serotypes in our study with that of South and Southeast Asia, North America, and other African countries. This is the first reports on the natural DENV serotypes co-infection among Aedes species pools in Nigeria, which can create possible interaction with other flaviviruses causing animal and human diseases. In addition, our study postulates the possible linkage between DENV serotypes infection and human febrile flu-like disease burden being experienced by host communities in northeastern Nigeria.
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Affiliation(s)
- Ibrahim Isa
- Department of Zoology, Ahmadu Bello University Zaria, Nigeria
| | - Iliya Shehu Ndams
- Department of Zoology, Ahmadu Bello University Zaria, Nigeria.,Africa Centre of Excellence for Neglected Tropical Diseases & Forensic Biotechnology, Ahmadu Bello University Zaria, Nigeria
| | - Maryam Aminu
- Department of Microbiology, Ahmadu Bello University Zaria, Nigeria
| | - Gloria Chechet
- Department of Biochemistry, Ahmadu Bello University Zaria, Nigeria.,Africa Centre of Excellence for Neglected Tropical Diseases & Forensic Biotechnology, Ahmadu Bello University Zaria, Nigeria
| | | | - Ayo Yila Simon
- Africa Centre of Excellence for Neglected Tropical Diseases & Forensic Biotechnology, Ahmadu Bello University Zaria, Nigeria.,Center for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada.,National Centers for Animal Disease Research, Lethbridge Laboratory, Science Branch, Canadian Food Inspection Agency, Government of Canada, Lethbridge, Alberta, Canada
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Bang WJ, Won MH, Cho ST, Ryu J, Choi KS. A multiplex PCR assay for six Aedini species, including Aedes albopictus. Parasit Vectors 2021; 14:380. [PMID: 34321059 PMCID: PMC8317425 DOI: 10.1186/s13071-021-04871-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 07/05/2021] [Indexed: 11/22/2022] Open
Abstract
Background Mosquitoes, as vectors of various human pathogens, are significant drivers of serious human illness. In particular, those species in the Aedini tribe, which typically transmit dengue virus, Chikungunya fever virus, and Zika virus, are increasing their range because of climate change and international commerce. In order to evaluate the risk of disease transmission, accurate mosquito species identification and monitoring are needed. The goal of this work was to develop a rapid and simple molecular diagnostic method for six morphologically similar Aedini species (Aedes flavopictus, Aedes albopictus, Ochlerotatus koreicus, Ochlerotatus japonicus, Ochlerotatus togoi and Ochlerotatus hatorii) in Korea. Methods A total of 109 samples were assayed in this study. The internal transcribed spacer 2 (ITS2) regions from all six species were amplified, sequenced and analyzed using Mega 6. Following the identification of regions that were consistently different in terms of sequence between all six species, multiplex primers were designed to amplify these regions to generate species-specific fragments distinguishable by their size. Results Uniquely sized fragments were generated in Ae. flavopictus (495 bp), Ae. albopictus (438 bp), Oc. koreicus (361 bp), Oc. togoi (283 bp), Oc. hatorii (220 bp) and Oc. japonicus (160 bp). Pairwise distance analysis showed that the difference was 35.0 ± 1.5% between Aedes spp. and Ochlerotatus spp., 17.4 ± 0.2% between Ae. albopictus and Ae. flavopictus and 11.1 ± 0.3% between Oc. koreicus and Oc. japonicus. Conclusions In this study, a multiplex PCR assay for six species of the Aedini tribe was developed. This assay is more accurate than morphological identification and will be useful for monitoring and controlling these vector mosquitoes. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-021-04871-7.
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Affiliation(s)
- Woo Jun Bang
- School of Life Sciences, Kyungpook National University, Biology building 226, Daehak-ro 80, Daegu, Korea.,Research Institute for Dokdo and Ulleungdo Island, Kyungpook National University, Daegu, Korea
| | - Min Hyeok Won
- School of Life Sciences, Kyungpook National University, Biology building 226, Daehak-ro 80, Daegu, Korea.,Research Institute for Dokdo and Ulleungdo Island, Kyungpook National University, Daegu, Korea
| | - Seong Tae Cho
- School of Life Sciences, Kyungpook National University, Biology building 226, Daehak-ro 80, Daegu, Korea
| | - Jihun Ryu
- School of Life Sciences, Kyungpook National University, Biology building 226, Daehak-ro 80, Daegu, Korea.,Research Institute for Dokdo and Ulleungdo Island, Kyungpook National University, Daegu, Korea
| | - Kwang Shik Choi
- School of Life Sciences, Kyungpook National University, Biology building 226, Daehak-ro 80, Daegu, Korea. .,Research Institute for Dokdo and Ulleungdo Island, Kyungpook National University, Daegu, Korea. .,Research Institute for Phylogenomics and Evolution, Kyungpook National University, Daegu, Korea.
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Shin J, Jung J. Comparative population genetics of the invasive mosquito Aedes albopictus and the native mosquito Aedes flavopictus in the Korean peninsula. Parasit Vectors 2021; 14:377. [PMID: 34315478 PMCID: PMC8314453 DOI: 10.1186/s13071-021-04873-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 07/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Aedes mosquitoes are important invasive species contributing to the spread of chikungunya, dengue fever, yellow fever, zika virus, and other dangerous vector-borne diseases. Aedes albopictus is native to southeast Asia, with rapid expansion due to human activity, showing a wide distribution in the Korean peninsula. Aedes flavopictus is considered to be native to East Asia, with a broad distribution in the region, including the Korean peninsula. A better understanding of the genetic diversity of these species is critical for establishing strategies for disease prevention and vector control. METHODS We obtained DNA from 148 specimens of Ae. albopictus and 166 specimens of Ae. flavopictus in Korea, and amplified two mitochondrial genes (COI and ND5) to compare the genetic diversity and structure of the two species. RESULTS We obtained a 658-bp sequence of COI and a 423-bp sequence of ND5 from both mosquito species. We found low diversity and a nonsignificant population genetic structure in Ae. albopictus, and high diversity and a nonsignificant structure in Ae. flavopictus for these two mitochondrial genes. Aedes albopictus had fewer haplotypes with respect to the number of individuals, and a slight mismatch distribution was confirmed. By contrast, Ae. flavopictus had a large number of haplotypes compared with the number of individuals, and a large unimodal-type mismatch distribution was confirmed. Although the genetic structure of both species was nonsignificant, Ae. flavopictus exhibited higher genetic diversity than Ae. albopictus. CONCLUSIONS Aedes albopictus appears to be an introduced species, whereas Ae. flavopictus is endemic to the Korean peninsula, and the difference in genetic diversity between the two species is related to their adaptability and introduction history. Further studies on the genetic structure and diversity of these mosquitos will provide useful data for vector control.
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Affiliation(s)
- Jiyeong Shin
- The Division of EcoCreative, Ewha Womans University, Seoul, 03760 South Korea
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul, 03760 South Korea
- Department of Science Education, Ewha Womans University, Seoul, 03760 South Korea
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Shin J, Jung J. Complete mitochondrial genome of Aedes flavopictus (Yamada, 1921) (Diptera: Culicidae) collected in South Korea. MITOCHONDRIAL DNA PART B-RESOURCES 2021; 6:265-267. [PMID: 33553640 PMCID: PMC7850365 DOI: 10.1080/23802359.2020.1863164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we determined for the first time the mitochondrial genome sequence of an Aedes flavopictus specimen collected in South Korea. Its mitochondrial genome was 16,060 bp in length, consisting of 13 protein-coding, 22 tRNA, and 2 rRNA genes and a non-coding A + T rich region. The overall base composition in the heavy strand was 39.7, 8.6, 12.7, and 39% of A, G, C, and T, respectively, and the G + C content was 21.2%. Phylogenetic analysis revealed that Aedes spp. formed a monophyletic clade.
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Affiliation(s)
- Jiyeong Shin
- The Division of EcoCreative, Ewha Womans University, Seoul, Republic of Korea
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul, Republic of Korea.,Department of Science Education, Ewha Womans University, Seoul, Republic of Korea
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Chaves LF, Friberg MD. Aedes albopictus and Aedes flavopictus (Diptera: Culicidae) pre-imaginal abundance patterns are associated with different environmental factors along an altitudinal gradient. CURRENT RESEARCH IN INSECT SCIENCE 2020; 1:100001. [PMID: 36003600 PMCID: PMC9387439 DOI: 10.1016/j.cris.2020.100001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/20/2020] [Accepted: 10/09/2020] [Indexed: 06/14/2023]
Abstract
Aedes (Stegomyia) albopictus (Skuse) is a major global invasive mosquito species that, in Japan, co-occurs with Aedes (Stegomyia) flavopictus Yamada, a closely related species recently intercepted in Europe. Here, we present results of a detailed 25-month long study where we biweekly sampled pupae and fourth instar larvae of these two species from ovitraps set along Mt. Konpira, Nagasaki, Japan. This setting allowed us to ask whether these species had different responses to changes in environmental variables along the altitudinal gradient of an urban hill. We found that spatially Ae. albopictus abundance decreased, while Ae. flavopictus abundance increased, the further away from urban land. Ae. flavopictus also was more abundant than Ae. albopictus in locations with homogenous vegetation growth with a high mean Enhanced Vegetation Index (EVI), platykurtic EVI, and low SD in canopy cover, while Ae. albopictus was more abundant than Ae. flavopictus in areas with more variable (high SD) canopy cover. Moreover, Ae. flavopictus abundance negatively impacted the spatial abundance of Ae. albopictus. Temporally we found that Ae. flavopictus was more likely to be present in Mt. Konpira at lower temperatures than Ae. albopictus. Our results suggest that spatial and temporal abundance patterns of these two mosquito species are partially driven by their different response to environmental factors.
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Affiliation(s)
- Luis Fernando Chaves
- Instituto Costarricense de Investigación y Enseñanza en Nutrición y Salud (INCIENSA), Apartado Postal 4-2250, Tres Ríos, Cartago, Costa Rica
| | - Mariel D. Friberg
- Earth Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
- Universities Space Research Association, Columbia, MD 21046, USA
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Ibáñez-Justicia A, van de Vossenberg B, van den Biggelaar R, Voogd J, Metz E, Jacobs F, Dik M, Stroo A. Detection of Aedes flavopictus (Yamada, 1921), Netherlands, June 2019. ACTA ACUST UNITED AC 2020; 24. [PMID: 31362811 PMCID: PMC6668286 DOI: 10.2807/1560-7917.es.2019.24.30.1900433] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In June 2019, a single specimen collected at a used tyre company was identified as Aedes flavopictus (Yamada, 1921), a sibling species of Ae. albopictus. Ae. flavopictus has not been recorded outside Japan and South Korea. Although it has only shown dengue virus vector competence under laboratory conditions, its detection demonstrates the value of active surveillance at risk locations and molecular tools for timely intervention against exotic mosquitoes with potential future public health impact.
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Affiliation(s)
- Adolfo Ibáñez-Justicia
- Centre for Monitoring of Vectors, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Bart van de Vossenberg
- Molecular Biology Group, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Rens van den Biggelaar
- Centre for Monitoring of Vectors, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Joris Voogd
- Molecular Biology Group, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Eveline Metz
- Molecular Biology Group, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Frans Jacobs
- Centre for Monitoring of Vectors, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Marian Dik
- Centre for Monitoring of Vectors, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
| | - Arjan Stroo
- Centre for Monitoring of Vectors, National Reference Centre, Netherlands Food and Consumer Product Safety Authority, Wageningen, Netherlands
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