Peer Review History

Original SubmissionNovember 16, 2021
Decision Letter - Erik K Flemington, Editor, Ekaterina E. Heldwein, Editor

Dear Dr. Szpara,

Thank you very much for submitting your manuscript "Comparison of herpes simplex virus 1 genomic diversity between adult sexual transmission partners with genital infection" for consideration at PLOS Pathogens. As with all papers reviewed by the journal, your manuscript was reviewed by members of the editorial board and by two independent reviewers who are experts in the field. Both reviewers found the subject of the study to be significant. Whereas Reviewer 2 was very enthusiastic, Reviewer 1 had major concerns about data analysis and interpretation. In light of the reviews (below this email), we would like to invite the resubmission of a significantly-revised version that carefully addresses all of the reviewers' criticisms. In addition, to engage a broader PLOS Pathogens readership, please, restate your major conclusions throughout the manuscript avoiding jargon.

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Thank you again for your submission. We hope that our editorial process has been constructive so far, and we welcome your feedback at any time. Please don't hesitate to contact us if you have any questions or comments.

Sincerely,

Ekaterina E. Heldwein

Guest Editor

PLOS Pathogens

Erik Flemington

Section Editor

PLOS Pathogens

Kasturi Haldar

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0001-5065-158X

Michael Malim

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0002-7699-2064

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Reviewer's Responses to Questions

Part I - Summary

Please use this section to discuss strengths/weaknesses of study, novelty/significance, general execution and scholarship.

Reviewer #1: Both herpes simplex virus 1 and 2 (HSV-1 and HSV-2) can be responsible for genital herpes lesions. HSV-1 classically oral infections and HSv-2 genital infections, however HSV-1 epidemiology is evolving in favour of an increasing number of primary infections occur in the (ana-)genital anatomical niche. Viruses could adapt to their host over time thanks to genetic adaptation. As few data are known for HSV, especially for HSV-1 in the context of genital herpes, all studies concerning this subject are quite interesting. Then, the authors, Rathbun at al., try to study viral genetic diversity in the context of HSV-1 genital herpes. Indeed, they used deep-sequencing analysis to characterize the consensus HSV-1 sequences and to detect minor variants (MVs) within paired sexual partner samples.

Reviewer #2: Rathbun et al describe an important and elegant study of genetic variation in herpesvirus genomes among recently infected sexual partners. Both the study and the manuscript are highly accomplished and the authors are to be congratulated.

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Part II – Major Issues: Key Experiments Required for Acceptance

Please use this section to detail the key new experiments or modifications of existing experiments that should be absolutely required to validate study conclusions.

Generally, there should be no more than 3 such required experiments or major modifications for a "Major Revision" recommendation. If more than 3 experiments are necessary to validate the study conclusions, then you are encouraged to recommend "Reject".

Reviewer #1: I have read through the manuscript and I have major comments.

- To my opinion, the most bothering fault of this study is the analysis of sequencing data. Indeed how is it possible to take into account sequencing data whereas average coverage is very low (see Table 2: e.g. Sample v47_d61-79_gen with 31x of average coverage associated with low viral load of 2.6 cp/mL of virus as data was obtained form 15000 reads with pooled from two replicates or Sample v41_d354_oral with 28x of average coverage associated with low viral load of 2.2 cp/mL of virus as data was obtained form 4100 reads). The use of threshold of 20% supposedly more stringent is not appropriated. To my opinion, to be relevant, only samples with coverage depth <100x should not be considered. Most of the time, low average coverage is associated few reads available and high MV detection: e.g. Sample v47_d61-79_gen with 31x of average coverage associated with 225 MVs or Sample v41_d354_oral with 28x of average coverage associated with 144 MVs.

Can we trust that?

Moreover, the authors do not discuss quality criteria for sequence trimming in the MM section. May the authors cite publications where these criteria have been used for NGS analysis for HSV genomic diversity estimation?

- According to the authors, detection of MVs within the viral population revealed both shared and unique patterns of genetic diversity between partners, and between anatomical niches. But how to make the clear distinction anal and genital niche with self-sampling samples.

- Additionally, the authors discuss that genetic drift was detected from spatiotemporally separated samples in as little as three days. This period of time of 3 days appear to be unrealistic. Indeed, even under antiviral selection pressure for instance the evolution pf HSV-1 do not reach such a level of MV within viral genes implicated in antiviral resistance.

- It appears there is some discordance between text/tables/figure data makes difficult the interpretation of the study. Either I do not understand or this formulation is not clear enough for well-understanding! I think the authors simplify the tables and the figures to get straight to the point.

Reviewer #2: (No Response)

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Part III – Minor Issues: Editorial and Data Presentation Modifications

Please use this section for editorial suggestions as well as relatively minor modifications of existing data that would enhance clarity.

Reviewer #1: NONE

Reviewer #2: There are a number of places where it appears the text is referring to the wrong figure number or sub-number eg 6b rather than 6 C on page 13 line 292. It would be useful for the authors to systematically review all such references for accuracy.

The discussion should include comments on the limitations of the methodology in terms of variation in the depth of sequencing coverage between samples and the implications of this on the ability to detect MV.

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Reviewer #1: No

Reviewer #2: No

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Revision 1

Attachments
Attachment
Submitted filename: Response_to_Review_PLoS_Path_transmission_paper_v7.pdf
Decision Letter - Erik K Flemington, Editor, Ekaterina E. Heldwein, Editor

Dear Dr. Szpara,

We are pleased to inform you that your manuscript 'Comparison of herpes simplex virus 1 genomic diversity between adult sexual transmission partners with genital infection' has been provisionally accepted for publication in PLOS Pathogens.

Before your manuscript can be formally accepted you will need to complete some formatting changes, which you will receive in a follow up email. A member of our team will be in touch with a set of requests.

Please note that your manuscript will not be scheduled for publication until you have made the required changes, so a swift response is appreciated.

IMPORTANT: The editorial review process is now complete. PLOS will only permit corrections to spelling, formatting or significant scientific errors from this point onwards. Requests for major changes, or any which affect the scientific understanding of your work, will cause delays to the publication date of your manuscript.

Should you, your institution's press office or the journal office choose to press release your paper, you will automatically be opted out of early publication. We ask that you notify us now if you or your institution is planning to press release the article. All press must be co-ordinated with PLOS.

Thank you again for supporting Open Access publishing; we are looking forward to publishing your work in PLOS Pathogens.

Best regards,

Ekaterina E. Heldwein

Guest Editor

PLOS Pathogens

Erik Flemington

Section Editor

PLOS Pathogens

Kasturi Haldar

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0001-5065-158X

Michael Malim

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0002-7699-2064

***********************************************************

Reviewer Comments (if any, and for reference):

Formally Accepted
Acceptance Letter - Erik K Flemington, Editor, Ekaterina E. Heldwein, Editor

Dear Dr. Szpara,

We are delighted to inform you that your manuscript, "Comparison of herpes simplex virus 1 genomic diversity between adult sexual transmission partners with genital infection," has been formally accepted for publication in PLOS Pathogens.

We have now passed your article onto the PLOS Production Department who will complete the rest of the pre-publication process. All authors will receive a confirmation email upon publication.

The corresponding author will soon be receiving a typeset proof for review, to ensure errors have not been introduced during production. Please review the PDF proof of your manuscript carefully, as this is the last chance to correct any scientific or type-setting errors. Please note that major changes, or those which affect the scientific understanding of the work, will likely cause delays to the publication date of your manuscript. Note: Proofs for Front Matter articles (Pearls, Reviews, Opinions, etc...) are generated on a different schedule and may not be made available as quickly.

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Thank you again for supporting open-access publishing; we are looking forward to publishing your work in PLOS Pathogens.

Best regards,

Kasturi Haldar

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0001-5065-158X

Michael Malim

Editor-in-Chief

PLOS Pathogens

orcid.org/0000-0002-7699-2064

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