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Transfusion Clinique et Biologique ; 28(4):S25-S26, 2021.
Article in French | Academic Search Complete | ID: covidwho-1492675

ABSTRACT

La transfusion de plasma de donneurs convalescents (PDC) au cours de la COVID-19 est controversée. En France, hors essai clinique, elle est encadrée par un protocole à usage thérapeutique soumis à un avis multidisciplinaire (RCP) préalable. L'expérience de ce traitement en réanimation n'est pas décrite. Tous les patients admis dans une unité de réanimation d'un CHU pour un SDRA COVID-19 et ayant une PCR plasmatique SARS-CoV-2 positive au moins 10 jours après le début des symptômes ont reçu une transfusion de PDC après validation en RCP. L'objectif principal était d'évaluer la tolérance et la virémie 7 j après la transfusion (J7). Entre mai 2020 et avril 2021, 31 patients (27 hommes et 4 femmes, âge moyen = 69 ans) ont été inclus et ont reçu un volume médian de 836 mL de PDC sur 2 jours consécutifs. Tous présentaient au moins un facteur de risque de forme grave dont 15 une affection maligne évolutive et 14 avaient une sérologie SARS-CoV-2 négative à l'admission en réanimation. Les PDC ont été transfusés en moyenne 18 j après le début des symptômes et 8 j après l'admission en réanimation. À J7, 22/31 patients avaient une PCR plasmatique négative. Le délai médian de négativation de la PCR plasmatique était de 8 j. À J 7, le score de sévérité clinique OMS était stable pour 12/31 (39 %), en amélioration pour 14/31 (45 %) et détérioré pour 5/31 (16 %) patients. La mortalité à 28 jours était de 26 % (8/31 dont 3 dans les sept jours après PDC). Aucun évènement indésirable significatif lié à la transfusion n'a été rapporté. Notre étude confirme la faisabilité de la transfusion de PDC en réanimation, notamment en cas d'immunodépression humorale. (French) [ABSTRACT FROM AUTHOR] Copyright of Transfusion Clinique et Biologique is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

2.
COVID ; 1(1):337-344, 2021.
Article in English | MDPI | ID: covidwho-1390554

ABSTRACT

Since the beginning of the pandemic, a race has been underway to detect SARS-CoV-2 virus infection (PCR screening, serological diagnostic kits), treat patients (drug repurposing, standard care) and develop a vaccine. After almost a year of active circulation worldwide, SARS-CoV-2 variants have appeared in different countries. Those variants include mutations in multiple regions of the genome, particularly in the spike gene. Because this surface protein is a key player in both the spread of the virus and the efficacy of vaccine strategies, the challenge is to efficiently monitor the appearance of spike mutations in the population. The present work describes a procedure based on the widely available Sanger technology to produce a full-length sequence of the spike gene from patient-derived samples.

3.
J Med Virol ; 93(9): 5594-5598, 2021 Sep.
Article in English | MEDLINE | ID: covidwho-1212757

ABSTRACT

This study aims to assess the efficacy and safety of convalescent plasma therapy (CPT) in COVID-19 critically ill patients with protracted severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNAemia. A retrospective cohort study was conducted in intensive care unit (ICU). All patients with severe COVID-19 pneumonia for whom RNAemia remained positive more than 14 days after onset of the infection were included and given CPT. The primary objective was to evaluate SARS-CoV-2 RNAemia 7 days (D7) after CPT. A total of 14 patients were included and they received a median CPT volume of 828 ml (range: 817-960). CPT was administered in a median time of 14 days after ICU admission. At D7, 13/14 patients had negative SARS-CoV-2 blood PCR and one patient had negative blood PCR 11 days after CPT. At D7 and at D14, the clinical status was improved in 7/14 and 11/14 patients, respectively. The 28-day mortality rate was 14%. No CPT-related adverse effects had been reported. CPT is safe and may be efficient in patients with protracted RNAemia admitted in ICU for severe COVID-19 pneumonia. Randomized controlled trials are needed to confirm these results.


Subject(s)
COVID-19/blood , COVID-19/therapy , RNA, Viral/blood , SARS-CoV-2 , Aged , Aged, 80 and over , COVID-19/mortality , Feasibility Studies , Female , France , Humans , Immunization, Passive , Intensive Care Units , Male , Middle Aged , Retrospective Studies , Severity of Illness Index
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