Emergence of Two Distinct SARS-CoV-2 Gamma Variants and the Rapid Spread of P.1-like-II SARS-CoV-2 during the Second Wave of COVID-19 in Santa Catarina, Southern Brazil

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Abstract

The western mesoregion of the state of Santa Catarina (SC), Southern Brazil, was heavily affected as a whole by the COVID-19 pandemic in early 2021. This study aimed to evaluate the dynamics of the SARS-CoV-2 virus spreading patterns in the SC state from March 2020 to April 2021 using genomic surveillance. During this period, there were 23 distinct variants, including Beta and Gamma, among which the Gamma and related lineages were predominant in the second pandemic wave within SC. A regionalization of P.1-like-II in the Western SC region was observed, concomitant to the increase in cases, mortality, and the case fatality rate (CFR) index. This is the first evidence of the regionalization of the SARS-CoV-2 transmission in SC and it highlights the importance of tracking the variants, dispersion, and impact of SARS-CoV-2 on the public health systems.

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  1. SciScore for 10.1101/2022.01.13.22268697: (What is this?)

    Please note, not all rigor criteria are appropriate for all manuscripts.

    Table 1: Rigor

    EthicsIRB: This study was approved by the Federal University of Santa Catarina Ethics Committee (CAAE:
    Sex as a biological variablenot detected.
    RandomizationBriefly, complementary DNA (cDNA) was synthesized from viral RNA using 50 μM random primers and 200 U/μL Superscript IV reverse transcriptase (ThermoFisher Scientific, Waltham, MA, USA).
    Blindingnot detected.
    Power Analysisnot detected.

    Table 2: Resources

    Software and Algorithms
    SentencesResources
    Briefly, low-quality bases (Q < 25) and Illumina adapters were trimmed (19), and mapped to the human reference genome (hg19 - GCF_000001405.13) to remove contaminants using BWA v.
    BWA
    suggested: (BWA, RRID:SCR_010910)
    1.3 (21) and mpileup function from samtools v.
    samtools
    suggested: (SAMTOOLS, RRID:SCR_002105)
    Mutations, deletions, and insertions were used to assess the dissimilarity of the genomes using the vegan R package v. 2.5.6 (25) with the Jaccard index method.
    vegan
    suggested: (vegan, RRID:SCR_011950)
    The multidimensional scaling (MDS) and the distribution of variants in SC were plotted using the ggplot2 R package v. 3.3.0 (26)
    ggplot2
    suggested: (ggplot2, RRID:SCR_014601)
    7.310 (27) with default parameters and were manually curated using AliView v.
    AliView
    suggested: (AliView, RRID:SCR_002780)
    A ML tree was constructed using the alignment, with GTR+F+I as the substitution model predicted by ModelFinder (29), 1,000 bootstrap runs using UFBoot tree optimization (30) and SH-like approximate likelihood ratio test (SH-aLRT) (31), using IQ-TREE v.
    IQ-TREE
    suggested: (IQ-TREE, RRID:SCR_017254)
    Spike (S) gene sequence polymorphism and protein structure analysis: For structural analysis of S protein of VOC Gamma, 57 presented full-length S protein coverage of VOC Gamma sequenced in this study with 722 retrieved from GISAID (December 3rd, 2021), including the reference sequence (NC_045512.2) were aligned using MAFFT (27).
    MAFFT
    suggested: (MAFFT, RRID:SCR_011811)
    The mutations were highlighted and colored according to observed frequencies and built with PyMOL version 2.3.3 software (35).
    PyMOL
    suggested: (PyMOL, RRID:SCR_000305)

    Results from OddPub: We did not detect open data. We also did not detect open code. Researchers are encouraged to share open data when possible (see Nature blog).


    Results from LimitationRecognizer: An explicit section about the limitations of the techniques employed in this study was not found. We encourage authors to address study limitations.

    Results from TrialIdentifier: No clinical trial numbers were referenced.


    Results from Barzooka: We did not find any issues relating to the usage of bar graphs.


    Results from JetFighter: We did not find any issues relating to colormaps.


    Results from rtransparent:
    • Thank you for including a conflict of interest statement. Authors are encouraged to include this statement when submitting to a journal.
    • Thank you for including a funding statement. Authors are encouraged to include this statement when submitting to a journal.
    • No protocol registration statement was detected.

    Results from scite Reference Check: We found no unreliable references.


    About SciScore

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