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Langat SK, Kerich G, Cinkovich S, Johnson J, Ambale J, Yalwala S, Opot B, Garges E, Ojwang E, Eyase F. Genome sequences of Phasi Charoen-like phasivirus and Fako virus from Aedes aegypti mosquitoes collected in coastal Kenya. Microbiol Resour Announc 2023; 12:e0067823. [PMID: 37846988 PMCID: PMC10652973 DOI: 10.1128/mra.00678-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 09/18/2023] [Indexed: 10/18/2023] Open
Abstract
We report the sequencing of two viruses, Phasi Charoen-like phasivirus (PCLV) and Fako virus (FAKV), which were detected in a pool of Aedes aegypti from Kenya. Analysis showed a high similarity of PCLV to publicly available PCLV genomes from Kenya. FAKV showed a high genetic divergence from publicly available FAKV genomes.
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Affiliation(s)
- Solomon K. Langat
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
- Center for Virus Research, Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
| | - Gladys Kerich
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Stephanie Cinkovich
- Global Emerging Infections Surveillance Branch, Armed Forces Health Surveillance Division, Defense Health Agency, Silver Spring, Maryland, USA
- Cherokee Nation Strategic Programs, Tulsa, Oklahoma, USA
| | - Jaree Johnson
- Armed Forces Pest Management Board, Silver Spring, Maryland, USA
| | - Janet Ambale
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Santos Yalwala
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Benjamin Opot
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Eric Garges
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Elly Ojwang
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
| | - Fredrick Eyase
- Department of Entomology and Vector Borne Infections, United States Army Medical Research Directorate-Africa (USAMRD-A), Center for Clinical Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya
- Center for Virus Research, Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
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Langat SK, Eyase F, Bulimo W, Lutomiah J, Oyola SO, Imbuga M, Sang R. Profiling of RNA Viruses in Biting Midges ( Ceratopogonidae) and Related Diptera from Kenya Using Metagenomics and Metabarcoding Analysis. mSphere 2021; 6:e0055121. [PMID: 34643419 PMCID: PMC8513680 DOI: 10.1128/msphere.00551-21] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/15/2021] [Indexed: 11/28/2022] Open
Abstract
Vector-borne diseases (VBDs) cause enormous health burden worldwide, as they account for more than 17% of all infectious diseases and over 700,000 deaths each year. A significant number of these VBDs are caused by RNA virus pathogens. Here, we used metagenomics and metabarcoding analysis to characterize RNA viruses and their insect hosts among biting midges from Kenya. We identified a total of 15 phylogenetically distinct insect-specific viruses. These viruses fall into six families, with one virus falling in the recently proposed negevirus taxon. The six virus families include Partitiviridae, Iflaviridae, Tombusviridae, Solemoviridae, Totiviridae, and Chuviridae. In addition, we identified many insect species that were possibly associated with the identified viruses. Ceratopogonidae was the most common family of midges identified. Others included Chironomidae and Cecidomyiidae. Our findings reveal a diverse RNA virome among Kenyan midges that includes previously unknown viruses. Further, metabarcoding analysis based on COI (cytochrome c oxidase subunit 1 mitochondrial gene) barcodes reveal a diverse array of midge species among the insects used in the study. Successful application of metagenomics and metabarcoding methods to characterize RNA viruses and their insect hosts in this study highlights a possible simultaneous application of these two methods as cost-effective approaches to virus surveillance and host characterization. IMPORTANCE The majority of the viruses that currently cause diseases in humans and animals are RNA viruses, and more specifically arthropod-transmitted viruses. They cause diseases such as dengue, West Nile infection, bluetongue disease, Schmallenberg disease, and yellow fever, among others. Several sequencing investigations have shown us that a diverse array of RNA viruses among insect vectors remain unknown. Some of these could be ancient lineages that could aid in comprehensive studies on RNA virus evolution. Such studies may provide us with insights into the evolution of the currently pathogenic viruses. Here, we applied metagenomics to field-collected midges and we managed to characterize several RNA viruses, where we recovered complete and nearly complete genomes of these viruses. We also characterized the insect host species that are associated with these viruses. These results add to the currently known diversity of RNA viruses among biting midges as well as their associated insect hosts.
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Affiliation(s)
- Solomon K. Langat
- Department of Biochemistry, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Fredrick Eyase
- Institute of Biotechnology Research, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate—Africa, Nairobi, Kenya
| | - Wallace Bulimo
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
- Department of Biochemistry, University of Nairobi, Nairobi, Kenya
| | - Joel Lutomiah
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Mabel Imbuga
- Department of Biochemistry, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Rosemary Sang
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
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Langat SK, Eyase FL, Berry IM, Nyunja A, Bulimo W, Owaka S, Ofula V, Limbaso S, Lutomiah J, Jarman R, Distelhorst J, Sang RC. Origin and evolution of dengue virus type 2 causing outbreaks in Kenya: Evidence of circulation of two cosmopolitan genotype lineages. Virus Evol 2020; 6:veaa026. [PMID: 32523778 PMCID: PMC7266482 DOI: 10.1093/ve/veaa026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Dengue fever (DF) is an arboviral disease caused by dengue virus serotypes 1-4 (DENV 1-4). Globally, DF incidence and disease burden have increased in the recent past. Initially implicated in a 1982 outbreak, DENV-2 recently reemerged in Kenya causing outbreaks between 2011 and 2014 and more recently 2017–8. The origin and the evolutionary patterns that may explain the epidemiological expansion and increasing impact of DENV-2 in Kenya remain poorly understood. Using whole-genome sequencing, samples collected during the 2011–4 and 2017–8 dengue outbreaks were analyzed. Additional DENV-2 genomes were downloaded and pooled together with the fourteen genomes generated in this study. Bioinformatic methods were used to analyze phylogenetic relationships and evolutionary patterns of DENV-2 causing outbreaks in Kenya. The findings from this study have shown the first evidence of circulation of two different Cosmopolitan genotype lineages of DENV-2; Cosmopolitan-I (C-I) and Cosmopolitan-II (C-II), in Kenya. Our results put the origin location of C-I lineage in India in 2011, and C-II lineage in Burkina Faso between 1979 and 2013. C-I lineage was the most isolated during recent outbreaks, thus showing the contribution of this newly emerged strain to the increased DENV epidemics in the region. Our findings, backed by evidence of recent local epidemics that have been associated with C-I in Kenya and C-II in Burkina Faso, add to the growing evidence of expanding circulation and the impact of multiple strains of DENV in the region as well as globally. Thus, continued surveillance efforts on DENV activity and its evolutionary trends in the region, would contribute toward effective control and the current vaccine development efforts.
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Affiliation(s)
- Solomon K Langat
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Fredrick Lunyagi Eyase
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Institute for Biotechnology Research, Jomo Kenyatta University of Agriculture and Technology
| | | | - Albert Nyunja
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Wallace Bulimo
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Department of Biochemistry, University of Nairobi
| | - Samuel Owaka
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Victor Ofula
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Samson Limbaso
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
| | - Joel Lutomiah
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
| | - Richard Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research
| | - John Distelhorst
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Rosemary C Sang
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
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