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Use of whole-genome sequencing in the molecular investigation of care-associated HCoV-OC43 infections in a hematopoietic stem cell transplant unit

Abstract : BACKGROUND: While respiratory viral infections are recognized as a frequent cause of illness in hematopoietic stem cell transplantation (HSCT) recipients, HCoV-OC43 infections have rarely been investigated as healthcare-associated infections in this population.OBJECTIVES: In this report, HCoV-OC43 isolates collected from HSCT patients were retrospectively characterized to identify potential clusters of infection that may stand for a hospital transmission.STUDY DESIGN: Whole-genome and S gene sequences were obtained from nasal swabs using next-generation sequencing and phylogenetic trees were constructed. Similar identity matrix and determination of the most common ancestor were used to compare clusters of patient's sequences. Amino acids substitutions were analysed.RESULTS: Genotypes B, E, F and G were identified. Two clusters of patients were defined from chronological data and phylogenetic trees. Analyses of amino acids substitutions of the S protein sequences identified substitutions specific for genotype F strains circulating among European people.CONCLUSIONS: HCoV-OC43 may be implicated in healthcare-associated infections.
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Submitted on : Thursday, July 21, 2022 - 7:30:31 AM
Last modification on : Wednesday, September 7, 2022 - 8:14:05 AM

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Delphine Beury, Léa Fléchon, Florence Maurier, Ségolène Caboche, Jean-Stéphane Varré, et al.. Use of whole-genome sequencing in the molecular investigation of care-associated HCoV-OC43 infections in a hematopoietic stem cell transplant unit. Journal of Clinical Virology, Elsevier, 2020, 122, pp.104206. ⟨10.1016/j.jcv.2019.104206⟩. ⟨hal-02403094⟩

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