Ayodeji Olayemi

Ayodeji Olayemi
Obafemi Awolowo University | OAU · Museum of Natural History (NHM)

PhD

About

39
Publications
11,174
Reads
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664
Citations
Citations since 2016
27 Research Items
539 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Introduction
Additional affiliations
September 2000 - present
Obafemi Awolowo University
Position
  • Researcher

Publications

Publications (39)
Article
Full-text available
Background: African pangolins are currently experiencing unprecedented levels of harvesting, feeding both local demands and the illegal international trade. So far, the lack of knowledge on the population genetics of African pangolins has hampered any attempts at assessing their demographic status and tracing their trade at the local scale. We con...
Article
Full-text available
Background: Lassa fever, killing thousands of people annually, is the most reported viral zoonotic disease in Nigeria. Recently, different rodent species carrying diverse lineages of the Lassa virus (LASV) in addition to a novel Mobala-like genetic sequence were detected within the country. Here, screening 906 small mammal specimens from 11 localit...
Article
Full-text available
The aim of this study was to evaluate the use of a capture enzyme-linked immunosorbent assay (ELISA) for the detection of LASV-reactive IgG antibodies in Mastomys rodents. The assay was used for laboratory-bred Mastomys rodents, as well as for animals caught in the wild in various regions of West Africa. The ELISA reached an accuracy of 97.1% in sa...
Article
Full-text available
Lassa fever (LF), a zoonotic illness, represents a public health burden in West African countries where the Lassa virus (LASV) circulates among rodents. Human exposure hinges significantly on LASV ecology, which is in turn shaped by various parameters such as weather seasonality and even virus and rodent-host genetics. Furthermore, human behaviour,...
Article
Full-text available
Ever since it was established that rodents serve as reservoirs of the zoonotic Lassa virus (LASV), scientists have sought to answer the questions: which populations of rodents carry the virus? How do fluctuations in LASV prevalence and rodent abundance influence Lassa fever outbreaks in humans? What does it take for the virus to adopt additional ro...
Article
Full-text available
Lassa fever is a viral hemorrhagic illness responsible for thousands of human deaths in West Africa yearly. Rodents are known as natural reservoirs of the causative Lassa mammarenavirus (LASV) while humans are regarded as incidental, spill-over hosts. Analysis of genetic sequences continues to add to our understanding of the evolutionary history, e...
Article
Full-text available
The murid rodent Praomys daltoni is widespread in Sudanian savanna and woodlands of West Africa, and previous study of mitochondrial DNA variability suggested that it encompasses the phenotypically (small, grey-bellied) and ecologically (commensal) distinct form, Praomys derooi. Here, we comprehensively examined the genetic and morphological divers...
Article
Wood mice of the genus Hylomyscus, are small-sized rodents widely distributed in lowland and montane rainforests in tropical Africa, where they can be locally abundant. Recent morphological and molecular studies have increased the number of recognized species from 8 to 18 during the last 15 years. We used complete mitochondrial genomes and five nuc...
Article
Shrews, insectivorous small mammals, pertain to an ancient mammalian order. We screened 693 European and African shrews for hepatitis B virus (HBV) homologs to elucidate the enigmatic genealogy of HBV. Shrews host HBVs at low prevalence (2.5%) across a broad geographic and host range. The phylogenetically divergent shrew HBVs comprise separate spec...
Article
The taxonomy of African shrew species is still unresolved due to their conserved morphology. This also affects knowledge concerning their geographic distribution. In Nigeria, using mitochondrial Cytochrome b gene sequences, we carried out a survey for shrews from the genus Crocidura across various ecological zones to determine taxa that are present...
Article
Full-text available
Background: Lassa fever, killing thousands of people annually, is the most reported viral zoonotic disease in Nigeria. Recently, different rodent species carrying diverse lineages of the Lassa virus (LASV) in addition to a novel Mobala-like genetic sequence were detected within the country. Here, screening 906 small mammal specimens from 11 locali...
Article
Full-text available
Nigeria has a rich small mammal community, with several species implicated as carriers of zoonotic microbes such as the Lassa virus (LASV). We sought to elucidate the diversity and distribution of these animals (including known LASV reservoirs) geographically, habitat-wise and seasonally. Our DNA-assisted survey detected at least 19 small mammal sp...
Article
Full-text available
Nigeria has a rich small mammal community, with several species implicated as carriers of zoonotic microbes such as the Lassa virus (LASV). We sought to elucidate the diversity and distribution of these animals (including known LASV reservoirs) geographically, habitat-wise and seasonally. Our DNA-assisted survey detected at least 19 small mammal sp...
Article
Knowledge on faunal diversification in African rainforests remains scarce. We used phylogeography to assess (i) the role of Pleistocene climatic oscillations in the diversification of the African common pangolin (Manis tricuspis), and (ii) the utility of our multi-locus approach for taxonomic delineation and trade tracing of this heavily poached sp...
Article
Full-text available
Osun Sacred Forest Grove is a unique landscape that combines important environmental, biological and cultural features. We conducted a multifaceted rapid assessment to evaluate the conservation status of the grove eleven years after it was designated a World Heritage Site. We recorded a rich diversity, consisting of 2 rock types, 3 minerals, 88 pla...
Data
Lassa virus (LASV) causes a deadly haemorrhagic fever in humans, killing several thousand people in West Africa annually. For 40 years, the Natal multimammate rat, Mastomys natalensis, has been assumed to be the sole host of LASV. We found evidence that LASV is also hosted by other rodent species: the African wood mouse Hylomyscus pamfi in Nigeria,...
Article
Full-text available
Lassa virus (LASV) causes a deadly haemorrhagic fever in humans, killing several thousand people in West Africa annually. For 40 years, the Natal multimammate rat, Mastomys natalensis, has been assumed to be the sole host of LASV. We found evidence that LASV is also hosted by other rodent species: the African wood mouse Hylomyscus pamfi in Nigeria,...
Article
Full-text available
Mastomys natalensis rodents are natural hosts for Lassa virus (LASV). Detection of LASV in 2 mitochondrial phylogroups of the rodent near the Niger and Benue Rivers in Nigeria underlines the potential for LASV emergence in fresh phylogroups of this rodent. A Mobala-like sequence was also detected in eastern Nigeria.
Data
Technical Appendix 2. Identity scores for the nucleotides and amino acids of the partial sequence of glycoprotein (949 nt).
Data
Technical Appendix 1. Primers used for viral and cytochrome b testing and phylogenetic analysis of cytochrome b in study of arenavirus diversity among phylogroups of Mastomys natalensis rodents captured in Nigeria during January 2011–March 2013.
Article
Full-text available
Interesting small mammal diversity is currently being uncovered in Nigeria, much of it through molecular analyses. The cytogenetic aspects of this diversity, however, remain largely unknown. In this study, diploid number and chromosome morphology viewed on Giemsa-stained slides for seven small mammal species trapped in Southwestern Nigeria are repo...
Article
Full-text available
The bushmeat trade in tropical Africa represents illegal, unsustainable off-takes of millions of tons of wild game –mostly mammals – per year. We sequenced four mitochondrial gene fragments (cyt b, COI, 12S, 16S) in >300 bushmeat items representing nine mammalian orders and 59 morphological species from five western and central African countries (G...
Article
Our study combined a mitochondrial cytochrome b phylogeny with cranial measurements from giant pouched rats collected across sub‐Saharan Africa. The mitochondrial phylogeny resolves two West African clades and a clade with east and central Africa representatives. This last clade can be further divided into four subclades. Altogether they represent...
Article
Full-text available
Context: Following recent socioeconomic transformations in western and central Africa, the volume of bushmeat hunting, a traditional source of proteins and revenue for rural populations, has reached unsustainable levels. The morphological identification of species sold on bushmeat market stalls may be challenging because of the presence of cryptic...
Article
Full-text available
Idanre, which represents a unique topographical landscape within southwestern Nigeria, is being proposed to the United Nations Educational Scientific and Cultural Organization (UNESCO) for designation as a world heritage site. In line with this, we conducted a survey to document the rich geological, biological and cultural resources contained withi...
Article
The rodent genus Praomys is widely distributed in the African tropics. The species are cryptic, rendering the species taxonomy unclear. There are differences of opinion concerning the specific status of Praomys misonnei and Praomys tullbergi, and their geographical distribution. We sequenced the cytochrome b and/or the 16S gene of 221 specimens fro...
Article
In this paper we describe a new species of Hylomyscus based on molecular (Cyt b and 16S rDNA gene sequencing) andmorphometrical analyses. This new species occurs in Benin and Nigeria, and probably also in Togo. It differs by 8.29 to10.40 % of sequence divergence (K2P distance for the Cyt b gene) from all other species of the H. alleni speciescomple...
Chapter
Full-text available
The rainforest block of southwestern Nigeria constitutes a unique ecosystem. It is also home to a rich small mammal community, for which the taxonomic composition, taxonomic richness and geographic distribution may serve as appropriate indicators of the evolutionary history and conservation status of this important segment of African biodiversity....
Article
Full-text available
Southward encroachment of the derived savanna zone with its attendant denudation of the rainforest in Nigeria adversely affects the diversity and distribution of mammals, particularly murid rodents. This study was carried out to establish the identities of murid rodent populations and to compare their diversity between forest and derived savanna si...
Article
This study was carried out to identify distinguishing morphometric characters between taxa from the genus Cricetomys in the rainforest. Specimens were captured from localities in the rainforest zone of South Western Nigeria, and 22 classic morphometric distances were taken on the skulls. Statistical analysis of morphometric data was carried out usi...
Article
Aim This study aims to elucidate the phylogeography of the murid rodent Lemniscomys striatus and to evaluate the relative roles of ecological change, habitat patchiness, rivers and geological barriers in structuring patterns of diversity. Location Sub-Saharan Africa. Methods The extent of phylogeographic patterns and molecular genetic diversity (cy...
Article
Full-text available
The African forest elephant, whose populations have been listed as being vulnerable by the International Union for Conservation of Nature (IUCN) and which is already locally extinct in many localities across southwestern Nigeria, represents a unique but fast disappearing component of the for-est ecosystem. This mammal also, for its sheer size and e...

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