New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches
The Amblyomma marmoreum complex includes afrotropical species, such as Amblyomma sparsum, a three-host tick that parasitizes reptiles, birds, and mammals, and is a recognized vector of Ehrlichia ruminantium. However, the lack of morphological, genetic and ecological data on A. sparsum has caused con...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Ticks and Tick-Borne Diseases |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1877959X24000165 |
| _version_ | 1797249143008133120 |
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| author | Andrea P. Cotes-Perdomo Alberto Sánchez-Vialas Richard Thomas Andrew Jenkins Juan E. Uribe |
| author_facet | Andrea P. Cotes-Perdomo Alberto Sánchez-Vialas Richard Thomas Andrew Jenkins Juan E. Uribe |
| author_sort | Andrea P. Cotes-Perdomo |
| collection | DOAJ |
| description | The Amblyomma marmoreum complex includes afrotropical species, such as Amblyomma sparsum, a three-host tick that parasitizes reptiles, birds, and mammals, and is a recognized vector of Ehrlichia ruminantium. However, the lack of morphological, genetic and ecological data on A. sparsum has caused considerable confusion in its identification. In this study, we used microscopy and metagenomic approaches to analyze A. sparsum ticks collected from a puff adder snake (Bitis arietans) in southwest Senegal (an endemic rickettsioses area) in order to supplement previous morphological descriptions, provide novel genomic data for the A. marmoreum complex, and describe the genome of a novel spotted fever group Rickettsia strain. Based on stereoscope and scanning electron microscopy (SEM) morphological evaluations, we provide high-quality images and new insights about punctation and enameling in the adult male of A. sparsum to facilitate identification for future studies. The metagenomic approach allowed us assembly the complete mitochondrial genome of A. sparsum, as well as the nearly entire chromosome and complete plasmid sequences of a novel Rickettsia africae strain. Phylogenomic analyses demonstrated a close relationship between A. sparsum and Amblyomma nuttalli for the first time and confirmed the position of A. sparsum within the A. marmoreum complex. Our results provide new insights into the systematics of A. sparsum and A. marmoreum complex, as well as the genetic diversity of R. africae in the Afrotropical region. Future studies should consider the possibility that A. sparsum may be a vector for R. africae. |
| first_indexed | 2024-03-07T22:55:15Z |
| format | Article |
| id | doaj.art-55504a5ac3404a049c7446b6c6233e4d |
| institution | Directory Open Access Journal |
| issn | 1877-9603 |
| language | English |
| last_indexed | 2024-04-24T20:25:47Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ticks and Tick-Borne Diseases |
| spelling | doaj.art-55504a5ac3404a049c7446b6c6233e4d2024-03-22T05:39:03ZengElsevierTicks and Tick-Borne Diseases1877-96032024-05-01153102323New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approachesAndrea P. Cotes-Perdomo0Alberto Sánchez-Vialas1Richard Thomas2Andrew Jenkins3Juan E. Uribe4Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences, University of South-Eastern, Norway; Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (MNCN-CSIC), 2José Gutiérrez Abascal 2, Madrid 28006, SpainDepartment of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (MNCN-CSIC), 2José Gutiérrez Abascal 2, Madrid 28006, SpainFacultad de Ciencias Veterinarias, Departamento de Ciencia Animal, Universidad de Concepción, Chillán, ChileDepartment of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences, University of South-Eastern, NorwayDepartment of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (MNCN-CSIC), 2José Gutiérrez Abascal 2, Madrid 28006, Spain; Corresponding author.The Amblyomma marmoreum complex includes afrotropical species, such as Amblyomma sparsum, a three-host tick that parasitizes reptiles, birds, and mammals, and is a recognized vector of Ehrlichia ruminantium. However, the lack of morphological, genetic and ecological data on A. sparsum has caused considerable confusion in its identification. In this study, we used microscopy and metagenomic approaches to analyze A. sparsum ticks collected from a puff adder snake (Bitis arietans) in southwest Senegal (an endemic rickettsioses area) in order to supplement previous morphological descriptions, provide novel genomic data for the A. marmoreum complex, and describe the genome of a novel spotted fever group Rickettsia strain. Based on stereoscope and scanning electron microscopy (SEM) morphological evaluations, we provide high-quality images and new insights about punctation and enameling in the adult male of A. sparsum to facilitate identification for future studies. The metagenomic approach allowed us assembly the complete mitochondrial genome of A. sparsum, as well as the nearly entire chromosome and complete plasmid sequences of a novel Rickettsia africae strain. Phylogenomic analyses demonstrated a close relationship between A. sparsum and Amblyomma nuttalli for the first time and confirmed the position of A. sparsum within the A. marmoreum complex. Our results provide new insights into the systematics of A. sparsum and A. marmoreum complex, as well as the genetic diversity of R. africae in the Afrotropical region. Future studies should consider the possibility that A. sparsum may be a vector for R. africae.http://www.sciencedirect.com/science/article/pii/S1877959X24000165High-throughput sequencingMitochondrial genomeAfrican tick-bite feverSpotted fever groupRickettsiales bacteriaTick metagenomics |
| spellingShingle | Andrea P. Cotes-Perdomo Alberto Sánchez-Vialas Richard Thomas Andrew Jenkins Juan E. Uribe New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches Ticks and Tick-Borne Diseases High-throughput sequencing Mitochondrial genome African tick-bite fever Spotted fever group Rickettsiales bacteria Tick metagenomics |
| title | New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches |
| title_full | New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches |
| title_fullStr | New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches |
| title_full_unstemmed | New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches |
| title_short | New insights into the systematics of the afrotropical Amblyomma marmoreum complex (Acari: Ixodidae) and the genome of a novel Rickettsia africae strain using morphological and metagenomic approaches |
| title_sort | new insights into the systematics of the afrotropical amblyomma marmoreum complex acari ixodidae and the genome of a novel rickettsia africae strain using morphological and metagenomic approaches |
| topic | High-throughput sequencing Mitochondrial genome African tick-bite fever Spotted fever group Rickettsiales bacteria Tick metagenomics |
| url | http://www.sciencedirect.com/science/article/pii/S1877959X24000165 |
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