Detection in and circulation of Bluetongue virus among domestic ruminants in Madagascar

Andriamandimby, Soa Fy; Viarouge, Cyril; Ravalohery, Jean-Pierre; Reynes, Jean-Marc; Sailleau, Corinne; Tantely, Michaël Luciano; Élissa, Nohal; Cardinale, Éric; Sall, Amadou Alpha; Zientara, Stéphan; Heraud, Jean‐Michel

doi:10.1016/j.vetmic.2015.02.009

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…The prevalence of BTV nucleic acid observed in cattle and goats in both wet (7.3%) and dry (2.7%) seasons as compared to wildlife (0.4%), suggests that cattle and goats, unlike wildlife, play an important role in the maintenance of BTV in Zambia. These results support earlier assertions that cattle and small ruminants such as goats, are important reservoir hosts for BTV in Africa [33][34][35].…”

Section: Discussionsupporting

confidence: 91%

“…The seroprevalence (96.2%) of BTV in cattle from Lusaka and Central provinces was high, indicative of widespread exposure to infection. High seroprevalence (95.9%) has been previously reported in cattle from Madagascar [35]. The observed high seroprevalence in cattle from Zambia was possibly due to increased Culicoides activity since sampling was undertaken during the wet season.…”

Section: Discussionmentioning

confidence: 61%

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Co-Circulation of Multiple Serotypes of Bluetongue Virus in Zambia

Chambaro

Sasaki

Simulundu

et al. 2020

Viruses

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Bluetongue (BT) is an arthropod-borne viral disease of ruminants with serious trade and socio-economic implications. Although the disease has been reported in a number of countries in sub-Saharan Africa, there is currently no information on circulating serotypes and disease distribution in Zambia. Following surveillance for BT in domestic and wild ruminants in Zambia, BT virus (BTV) nucleic acid and antibodies were detected in eight of the 10 provinces of the country. About 40% (87/215) of pooled blood samples from cattle and goats were positive for BTV nucleic acid, while one hartebeest pool (1/43) was positive among wildlife samples. Sequence analysis of segment 2 revealed presence of serotypes 3, 5, 7, 12 and 15, with five nucleotypes (B, E, F, G and J) being identified. Segment 10 phylogeny showed Zambian BTV sequences clustering with Western topotype strains from South Africa, intimating likely transboundary spread of BTV in Southern Africa. Interestingly, two Zambian viruses and one isolate from Israel formed a novel clade, which we designated as Western topotype 4. The high seroprevalence (96.2%) in cattle from Lusaka and Central provinces and co-circulation of multiple serotypes showed that BT is widespread, underscoring the need for prevention and control strategies.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 61%

Co-Circulation of Multiple Serotypes of Bluetongue Virus in Zambia

Chambaro

Sasaki

Simulundu

et al. 2020

Viruses

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“…Occurs in all biogeographic domains [ 85 , 108 ]. Zoophilic species (cattle, sheep, and poultry) [ 210 ] and involved in transmission of RVFV [ 181 ], Andasibe virus (ANDV) [ 85 ], Bluetongue virus (BTV) [ 4 ], and Wuchereria bancrofti [ 23 ]. In Africa, zoophilic species [ 114 ] and involved in transmission of Birao virus (BIRV) [ 45 ] and BABV [ 1 ].…”

Section: Presentation Of Malagasy Mosquitoesmentioning

confidence: 99%

An updated checklist of mosquito species (Diptera: Culicidae) from Madagascar

et al. 2016

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An updated checklist of 235 mosquito species from Madagascar is presented. The number of species has increased considerably compared to previous checklists, particularly the last published in 2003 (178 species). This annotated checklist provides concise information on endemism, taxonomic position, developmental stages, larval habitats, distribution, behavior, and vector-borne diseases potentially transmitted. The 235 species belong to 14 genera: Aedeomyia (3 species), Aedes (35 species), Anopheles (26 species), Coquillettidia (3 species), Culex (at least 50 species), Eretmapodites (4 species), Ficalbia (2 species), Hodgesia (at least one species), Lutzia (one species), Mansonia (2 species), Mimomyia (22 species), Orthopodomyia (8 species), Toxorhynchites (6 species), and Uranotaenia (73 species). Due to non-deciphered species complexes, several species remain undescribed. The main remarkable characteristic of Malagasy mosquito fauna is the high biodiversity with 138 endemic species (59%). Presence and abundance of species, and their association, in a given location could be a bio-indicator of environmental particularities such as urban, rural, forested, deforested, and mountainous habitats. Finally, taking into account that Malagasy culicidian fauna includes 64 species (27%) with a known medical or veterinary interest in the world, knowledge of their biology and host preference summarized in this paper improves understanding of their involvement in pathogen transmission in Madagascar.

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“…Further north, in Kenya, 19 BTV serotypes have been isolated from sentinel cattle but clinical disease is not evident among the indigenous sheep [ 12 ]. A recent study in Madagascar revealed a very high prevalence of BTV serotype 2 in cattle and large distribution of the virus amongst domestic ruminants [ 13 ]. In 2003, the first outbreak of BTV (BTV-3) occurred in the neighbouring Island of La Reunion [ 14 ] and at least four serotypes (BTV-2, 17, 10 and 21) have been detected circulating in deer from Mauritius [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Delineation of the population genetic structure of Culicoides imicola in East and South Africa

et al. 2015

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BackgroundCulicoides imicola Kieffer, 1913 is the main vector of bluetongue virus (BTV) and African horse sickness virus (AHSV) in Sub-Saharan Africa. Understanding the population genetic structure of this midge and the nature of barriers to gene flow will lead to a deeper understanding of bluetongue epidemiology and more effective vector control in this region.MethodsA panel of 12 DNA microsatellite markers isolated de novo and mitochondrial DNA were utilized in a study of C. imicola populations from Africa and an outlier population from the Balearic Islands. The DNA microsatellite markers and mitochondrial DNA were also used to examine a population of closely related C. bolitinos Meiswinkel midges.ResultsThe microsatellite data suggest gene flow between Kenya and south-west Indian Ocean Islands exist while a restricted gene flow between Kenya and South Africa C. imicola populations occurs. Genetic distance correlated with geographic distance by Mantel test. The mitochondrial DNA analysis results imply that the C. imicola populations from Kenya and south-west Indian Ocean Islands (Madagascar and Mauritius) shared haplotypes while C. imicola population from South Africa possessed private haplotypes and the highest nucleotide diversity among the African populations. The Bayesian skyline plot suggested a population growth.ConclusionsThe gene flow demonstrated by this study indicates a potential risk of introduction of new BTV serotypes by wind-borne infected Culicoides into the Islands. Genetic similarity between Mauritius and South Africa may be due to translocation as a result of human-induced activities; this could impact negatively on the livestock industry. The microsatellite markers isolated in this study may be utilised to study C. bolitinos, an important vector of BTV and AHSV in Africa and identify sources of future incursions.Electronic supplementary materialThe online version of this article (doi:10.1186/s13071-015-1277-4) contains supplementary material, which is available to authorized users.

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Detection in and circulation of Bluetongue virus among domestic ruminants in Madagascar

Cited by 10 publications

References 17 publications

Co-Circulation of Multiple Serotypes of Bluetongue Virus in Zambia

Co-Circulation of Multiple Serotypes of Bluetongue Virus in Zambia

An updated checklist of mosquito species (Diptera: Culicidae) from Madagascar

Delineation of the population genetic structure of Culicoides imicola in East and South Africa

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