Publications by authors named "Emilie Go-Maro"

4 Publications

  • Page 1 of 1

Detection of avian influenza virus: a comparative study of the in silico and in vitro performances of current RT-qPCR assays.

Sci Rep 2020 05 21;10(1):8441. Epub 2020 May 21.

Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, Padova, 35020, Italy.

Avian influenza viruses (AIV) are negative sense RNA viruses posing a major threat to the poultry industry worldwide, with the potential to spread to mammals, including humans; hence, an accurate and rapid AIV diagnosis is essential. To date AIV detection relies on molecular methods, mainly RT-qPCR directed against AIV M gene segment. The evolution of AIV represents a relevant issue in diagnostic RT-qPCR due to possible mispriming and/or probe-binding failures resulting in false negative results. Consequently, RT-qPCR for AIV detection should be periodically re-assessed both in silico and in vitro. To this end, a specific workflow was developed to evaluate in silico the complementarity of primers and probes of four published RT-qPCR protocols to their target regions. The four assays and one commercially available kit for AIV detection were evaluated both for their analytical sensitivity using eight different viral dilution panels and for their diagnostic performances against clinical specimens of known infectious status. Differences were observed among the tests under evaluation, both in terms of analytical sensitivity and of diagnostic performances. This finding confirms the importance of continuously monitoring the primers and probes complementarity to their binding regions.
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http://dx.doi.org/10.1038/s41598-020-64003-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7242438PMC
May 2020

Risk Mapping of Influenza D Virus Occurrence in Ruminants and Swine in Togo Using a Spatial Multicriteria Decision Analysis Approach.

Viruses 2020 01 21;12(2). Epub 2020 Jan 21.

IHAP, UMR1225, Université de Toulouse, INRA, ENVT, 31076 Toulouse, France.

Influenza D virus (IDV) has been identified in several continents, with serological evidence for the virus in Africa. In order to improve the sensitivity and cost-benefit of IDV surveillance in Togo, risk maps were drawn using a spatial multicriteria decision analysis (MCDA) and experts' opinion to evaluate the relevance of sampling areas used so far. Areas at highest risk of IDV occurrence were the main cattle markets. The maps were evaluated with previous field surveillance data collected in Togo between 2017 and 2019: 1216 sera from cattle, small ruminants, and swine were screened for antibodies to IDV by hemagglutination inhibition (HI) assays. While further samples collections are needed to validate the maps, the risk maps resulting from the spatial MCDA approach generated here highlight several priority areas for IDV circulation assessment.
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http://dx.doi.org/10.3390/v12020128DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077333PMC
January 2020

Disentangling the role of Africa in the global spread of H5 highly pathogenic avian influenza.

Nat Commun 2019 11 22;10(1):5310. Epub 2019 Nov 22.

Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy.

The role of Africa in the dynamics of the global spread of a zoonotic and economically-important virus, such as the highly pathogenic avian influenza (HPAI) H5Nx of the Gs/GD lineage, remains unexplored. Here we characterise the spatiotemporal patterns of virus diffusion during three HPAI H5Nx intercontinental epidemic waves and demonstrate that Africa mainly acted as an ecological sink of the HPAI H5Nx viruses. A joint analysis of host dynamics and continuous spatial diffusion indicates that poultry trade as well as wild bird migrations have contributed to the virus spreading into Africa, with West Africa acting as a crucial hotspot for virus introduction and dissemination into the continent. We demonstrate varying paths of avian influenza incursions into Africa as well as virus spread within Africa over time, which reveal that virus expansion is a complex phenomenon, shaped by an intricate interplay between avian host ecology, virus characteristics and environmental variables.
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http://dx.doi.org/10.1038/s41467-019-13287-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6874648PMC
November 2019

Evolution of Highly Pathogenic Avian Influenza A(H5N1) Virus in Poultry, Togo, 2018.

Emerg Infect Dis 2019 12;25(12):2287-2289

In 2015, highly pathogenic avian influenza A(H5N1) viruses reemerged in poultry in West Africa. We describe the introduction of a reassortant clade 2.3.2.1c virus into Togo in April 2018. Our findings signal further local spread and evolution of these viruses, which could affect animal and human health.
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http://dx.doi.org/10.3201/eid2512.190054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6874233PMC
December 2019