A countrywide molecular survey leads to a seminal identification of the invasive cattle tick Rhipicephalus (Boophilus) microplus in Cameroon, a decade after it was reported in Cote d'Ivoire.

Algorithms Animal Distribution Animals Cameroon / epidemiology Cattle Cattle Diseases / epidemiology Cote d'Ivoire / epidemiology Cross-Sectional Studies Epidemiological Monitoring / veterinary Genetic Variation Haplotypes Phylogeny Polymorphism, Genetic RNA, Ribosomal, 16S / genetics Rhipicephalus / genetics Tick Infestations / epidemiology
Cameroon Genotyping Phylogenetic tree Rhipicephalus microplus

Journal

Ticks and tick-borne diseases
ISSN: 1877-9603
Titre abrégé: Ticks Tick Borne Dis
Pays: Netherlands
ID NLM: 101522599

Informations de publication

Date de publication:
04 2019
Historique:
received: 22 05 2018
revised: 17 12 2018
accepted: 04 02 2019
pubmed: 16 2 2019
medline: 8 5 2019
entrez: 16 2 2019
Statut: ppublish

Résumé

The cattle tick Rhipicephalus microplus is the most important arthropod vector of livestock diseases globally. Since its introduction in West Africa a decade ago, it has been reported in Ivory Coast, Benin, Togo, Mali, Burkina Faso and Nigeria with potentially far-reaching adverse impacts on the livestock sector in the region. Cameroon is located on a major route for transboundary cattle trade between Central and West Africa and it is therefore at risk from R. microplus invasion. This study investigated the occurrence of R. microplus in Cameroon, the genetic polymorphism of the tick and population structure of isolates from different regions of the country to provide data that underpin the design of future vector control programs. A cross-sectional survey was conducted in which ticks were collected from cattle at 54 sites across the five Agroecological zones (AEZs) within Cameroon. Tick identity (sex and species) was assigned using taxonomic keys. Species identity was confirmed through amplification and sequencing of the mitochondrial COI and 16S rRNA genes. A total of 7091 ticks were collected out of which 1112 (15.6%) were morphologically identified as R. microplus. The presence of R. microplus was confirmed in 4 out of 5 agroecological zones. Only two haplotypes were identified by both COI and 16S rRNA genes, indicating a very low divergence in the genetic structure of the R. microplus population in Cameroon. 16S rRNA sequence analysis revealed a new haplotype specific to Cameroon. Phylogenetic trees revealed that all isolates of R. microplus from Cameroon were grouped into the previously described Africa/Americas clade. Application of a niche modelling algorithm to R. microplus distribution in Cameroon predicted that suitable habitat for the tick extended into southern Nigeria. This study demonstrated for the first time the presence of R. microplus in Cameroon. Genetic diversity tests indicate that the tick has not evolved significantly since the initial introduction to West Africa. We suggest further longitudinal studies to better define the spatial and temporal expansion of the range of the tick and the drivers of this spread.

Identifiants

DOI: 10.1016/j.ttbdis.2019.02.002 PMID: 30765191 PMC: PMC6446184
pubmed: 30765191
pii: S1877-959X(18)30225-5
doi: 10.1016/j.ttbdis.2019.02.002
pmc: PMC6446184
pii:
doi:

Substances chimiques

RNA, Ribosomal, 16S 0

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

585-593

Informations de copyright

Copyright © 2019 The Authors. Published by Elsevier GmbH.. All rights reserved.

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Auteurs

Barberine A Silatsa (BA)

Biosciences eastern and central Africa - International Livestock Research Institute (BecA-ILRI) hub, P.O. Box 30709-00100, Nairobi, Kenya.

Jules-Roger Kuiate (JR)

Department of Biochemistry, Faculty of Sciences, University of Dschang, P.O. Box 67, Dschang, Cameroon.

Flobert Njiokou (F)

Laboratory of General Biology, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon.

Gustave Simo (G)

Molecular Parasitology and Entomology Unit, Department of Biochemistry, Faculty of Sciences, University of Dschang, P.O. Box 67, Dschang, Cameroon.

Jean-Marc K Feussom (JK)

Cameroon Epidemiosurveillance Network for Animal Diseases (RESCAM), Ministry of Livestock, Fisheries and Animal Industries, Yaounde, Cameroon.

Alabi Tunrayo (A)

International Institute of Tropical Agriculture (IITA), Oyo Road PMB 5320, Ibadan, Nigeria.

Gaston S Amzati (GS)

Biosciences eastern and central Africa - International Livestock Research Institute (BecA-ILRI) hub, P.O. Box 30709-00100, Nairobi, Kenya.

Bernard Bett (B)

Department of Biosciences, International Livestock Research Institute (ILRI), Nairobi, Kenya, P.O. Box 30709-00100, Nairobi, Kenya.

Richard Bishop (R)

Veterinary Microbiology and Pathology (VMP). Washington State University, 100 Dairy Road, 99164, Pullman, WA, USA.

Naftaly Githaka (N)

Department of Biosciences, International Livestock Research Institute (ILRI), Nairobi, Kenya, P.O. Box 30709-00100, Nairobi, Kenya.

Stephen O Opiyo (SO)

Molecular and Cellular Imaging Center - Columbus, The Ohio State University, Columbus, OH, 43210, USA.

Appolinaire Djikeng (A)

Biosciences eastern and central Africa - International Livestock Research Institute (BecA-ILRI) hub, P.O. Box 30709-00100, Nairobi, Kenya.

Roger Pelle (R)

Biosciences eastern and central Africa - International Livestock Research Institute (BecA-ILRI) hub, P.O. Box 30709-00100, Nairobi, Kenya. Electronic address: r.pelle@cgiar.org.

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Classifications MeSH

questionsmedicales.fr › Sciences de l'information › Méthodologies informatiques › Algorithmes › A countrywide molecular survey leads to a...
questionsmedicales.fr › Phénomènes biologiques › Répartition des animaux › A countrywide molecular survey leads to a...
questionsmedicales.fr › Eucaryotes › Animaux › A countrywide molecular survey leads to a...
questionsmedicales.fr › Régions géographiques › Afrique › Afrique subsaharienne › Afrique centrale › Cameroun › A countrywide molecular survey leads to a...
questionsmedicales.fr › Eucaryotes › Animaux › Chordés › Vertébrés › Mammifères › Eutheria › Artiodactyla › Ruminants › Bovins › A countrywide molecular survey leads to a...
questionsmedicales.fr › Maladies de l'animal › Maladies des bovins › A countrywide molecular survey leads to a...
questionsmedicales.fr › Régions géographiques › Afrique › Afrique subsaharienne › Afrique de l'Ouest › Côte d'Ivoire › A countrywide molecular survey leads to a...
questionsmedicales.fr › Environnement et santé publique › Santé publique › Méthodes épidémiologiques › Caractéristiques des études épidémiologiques › Études épidémiologiques › Études transversales › A countrywide molecular survey leads to a...
questionsmedicales.fr › Environnement et santé publique › Santé publique › Méthodes épidémiologiques › Surveillance épidémiologique › A countrywide molecular survey leads to a...
questionsmedicales.fr › Phénomènes génétiques › Variation génétique › A countrywide molecular survey leads to a...
questionsmedicales.fr › Phénomènes génétiques › Génotype › Haplotypes › A countrywide molecular survey leads to a...
questionsmedicales.fr › Sciences de l'information › Phylogenèse › A countrywide molecular survey leads to a...
questionsmedicales.fr › Phénomènes génétiques › Variation génétique › Polymorphisme génétique › A countrywide molecular survey leads to a...
questionsmedicales.fr › Acides nucléiques, nucléotides et nucléosides › Acides nucléiques › ARN › ARN ribosomique › ARN ribosomique 16S › A countrywide molecular survey leads to a...
questionsmedicales.fr › Eucaryotes › Animaux › Invertébrés › Arthropodes › Arachnida › Acari › Tiques › Ixodidae › Rhipicephalus › A countrywide molecular survey leads to a...
questionsmedicales.fr › Infection › Maladies parasitaires › Ectoparasitoses › Infestations par les tiques › A countrywide molecular survey leads to a...