Project #2286
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#2286 : viral evolution around Ebola Treatment Centre in Macenta and according to disease outcomes
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Name of Applicant : Caroline Picard
Date of application : 18-08-2015
Unit : Biology of Viral Emerging Infections
Location : Lyon
Phone : 0437282446
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Project context and summary :

The 2013-2015 Ebola virus disease epidemic is the largest outbreak so far described with 27 305 cases and 11 169 deaths. The virus spread by human to human contact throughout Western Africa and never before has a variant been transmitted for such a sustained period of time. Ebola virus are RNA virus so as other RNA viruses they could accumulate mutations during evolution. Therefore it is an emergency to monitor viral changes and adaptation within and between individuals in order to help researchers to better understand susceptibility to Ebola infections, to guide research on therapeutic targets and to ensure accurate diagnosis. New technologies can provide information about pathogen’s evolution and in our lab we have access to an Ion PGMTM sequencer. Thanks to the national reference center for viral hemorrhagic fever (VHF) we have at our disposal a large number of samples collected from Ebola infected patients especially from Guinea. We have developed an Amplicon approach using sixteen couples of specific primers for Ebola viruses and a RNA sequencing method based on randomly primed cDNA synthesis to product our libraries. Ion PGMTM Hi-Q sequencing kit will be used to sequence up to 400 bp inserts loaded onto 316v2TM or 318v2TM chip. Through high depth sequencing we would like to follow up the profiling of intra and inter host viral quasispecies at different time of the epidemic in the geographic area of the Ebola Treatment Centre in Macenta. Thanks to the activities of national reference center for VHF and the Biomics Pole one aim of the project is also to occasionally compare viral quasispecies and consensus sequences between patients who get uncommon symptoms from those who get classical illness and to study intra host quasispecies in different biological fluids (cerebrospinal fluid, sperm, urine) to see if there are differences between persistent species and viral quasispecies found during symptomatic step.

Related team publications :
Baize S, et al.: Emergence of Zaire Ebola Virus Disease in Guinea. N Engl J Med 2014, 371:1418-1425
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Project Type : Short
Status : Closed

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