Fluctuating RT-PCR Ct Values- A Case Series

Case Report | DOI: https://doi.org/10.31579/2690-8808/088

Fluctuating RT-PCR Ct Values- A Case Series

  • Soha Al Bayat 1
  • Jesha Mundodan 2*
  • Mohamed Sallam 3
  • Samina Hasnain 4
  • Hayat Khogali 5

1 Head of Vaccination, National COVID Track n Trace Team Lead, HP-CDC, Public Health Department, MOPH, Qatar. 
2 Public Health Specialist, HP-CDC, Public Health Department, MOPH, Qatar.
3 Public Health Physician / Case Investigator- Lead, HP-CDC, Public Health Department, MOPH, Qatar.
4 Public Health Physician, HP-CDC, Public Health Department, MOPH, Qatar.
5 Supervisor, Vaccination section / National COVID Track n Trace Team, HP-CDC, Public Health Department, MOPH, Qatar.

*Corresponding Author: Jesha Mohammedali Mundodan, Public Health Specialist, EPI Section, HP-CDC, MOPH, Qatar.

Citation: Soha Al Bayat, Jesha Mundodan, Mohamed Sallam, Samina Hasnain, Hayat Khogali (2022) Fluctuating RT-PCR Ct Values- A Case Series. J. Clin Case Rep and Studies 3(4); DOI:10.31579/2690-8808/088

Copyright: © 2022 Jesha Mundodan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: 16 August 2021 | Accepted: 06 September 2021 | Published: 10 May 2022

Keywords: fluctuating Ct values; COVID-19; SARS CoV-2; RT-PCR Ct values

Abstract

Real-time reverse transcriptase polymerase chain reaction (r RT-PCR) has been the main diagnostic tool for SARS-CoV-2 infection since the early stages of the COVID-19 pandemic and a positive test enables the clinicians and public health professionals to quickly isolate the patient and prevent spread of the disease. The presence of viral RNA confirms SARS CoV-2 and the Cycle threshold (Ct) values may give a rough estimate of viral load. Theoretically, the Ct value is inversely proportional to the amount of genetic material (RNA) in the starting sample and lower Ct values is generally associated with high viral load. Some experts assume that high viral load is directly correlated with increased infectiousness and severity of disease and suggest using Ct value or calculating viral load in decision-making. As per the policy, dated 14th June 2020, National Health Strategic Command Group in Qatar recommends using RT-PCR Ct value as a key determinant for decision on admission, discharge and isolation. The objective of this case series is to show that Ct values vary as the course of infection progresses, hence cannot be used as a reliable marker to take clinical decisions or even public health actions such as quarantine/ isolation. All six confirmed COVID-19 cases showed fluctuating RT-PCR Ct values throughout the course of illness. The Ct value was higher in the beginning of the course of infection, depicting low viral load and later in the course the Ct value dropped indicating higher viral load. The Ct value decreased as symptoms developed or worsened. There is a high probability that patients in early symptomatic stage may show a high Ct value which may subsequently change and thus management will change. In such cases, the high Ct values will give a false sense of security and thus have an impact on the containment of spread of infection to others. Hence, it is not recommended to rely on numerical Ct values for determining infectiousness of COVID-19 patients and deciding patient management protocols since the Ct value an indirect marker of viral load, changes over the course of infection. 

Introduction

Real-time reverse transcriptase polymerase chain reaction (r RT-PCR) has been the main diagnostic tool for SARS-CoV-2 infection since the early stages of the COVID-19 pandemic. This test confirms SARS CoV-2 by early detection of viral genome in clinical samples. There is a fluorescence signal in the test which increases proportional to the amount of amplified nucleic acid enabling accurate quantification of RNA in the sample. The cycle threshold or Ct value of a RT-PCR reaction is the number of cycles at which fluorescence of the PCR product is detectable over and above the background signal. If the fluorescence reaches a specified threshold within a certain number of PCR cycles (Ct value), the sample is declared positive. A COVID-19 testing laboratory needs to specify a Ct cut-off, which is the maximum number of PCR cycles for each test. A higher Ct cut-off means more patients are likely to receive positive diagnosis which causes an unnecessary burden and cost on already strained health care systems due to the COVID-19 pandemic. And vice versa, a lower Ct value cut-off means, that more patients may be missed and there is a higher chance for COVID-19 infections to spread in the community [1]. Many PCR assays involve Ct value 40 as cut off to consider the test positive, allowing detection of even very few starting RNA molecules [2]. The National laboratory in Qatar under Hamad Medical Corporation (HMC), considering significant local and international evidence, adopted a cut off Ct value of 40 and anybody with Ct > 40 were considered negative [3].

A positive test enables the clinicians and public health professionals to quickly isolate the patient and prevent spread of the disease. It is being assumed by some researchers / clinicians that high viral load directly correlates with increased infectiousness and severity of disease [4,5].

Ct values may give a rough estimate of viral load. Theoretically, the Ct value is inversely proportional to the amount of genetic material (RNA) in the starting sample and lower Ct values generally correlate with high viral load [6]. The National Health Strategic Command Group (NHSCG) in Qatar, recommends using PCR test Ct value as a key determinant for decision on admission, discharge and isolation. Any patient with RT-PCR Ct value > 33 is considered non-infectious and if he/she has symptoms, he/she were isolated in isolation facilities for 14 days from diagnosis whereas if the patient with Ct > 33 was asymptomatic, they were advised to self-isolate in their homes [3].

With effect from 19th June 2020, considering significant local and international evidence, the NHSCG revised the protocol for the RT-PCR Ct cut off values and hence the national laboratory revised their reporting pattern of RT-PCR results, as those with Ct value>30 being categorized as Reactive and those with <30>Active [7,8]. The COVID-19 System Wide Incident Command Committee (SWICC) too revised the protocol for admission and discharge from isolation facility using the revised cut off for RT-PCR Ct values [8]. Those with Ct value <30>

Both asymptomatic and mildly symptomatic cases can discontinue isolation after 14 days from diagnosis and there is no need to repeat PCR test for COVID-19 positive cases once confirmed positive. COVID-19 positive cases who are asymptomatic and have Ct value >30 and recommended self-isolation in their homes for 7 days from diagnosis and after which they are considered recovered and allowed to resume normal life. However, the symptomatic cases with Ct value >30 shall remain in an isolation facility for a week [8].  All close contacts of both positive and reactive cases with high-risk exposure would also be tested and quarantined for 14 days since the day of exposure even if the result is negative [8].

The objective of this case series is to show that Ct values vary as the course of infection progresses in a person, hence cannot be used as a reliable marker to take clinical decision-making process or even public health actions such as quarantine/ isolation. These are the first six cases that came to our notice in June 2020.

Summary of Cases

CASE 1: A 29-year-old Filipino female who works as house maid was in close contact with a positive person in the same household and was swabbed and tested positive for COVID with a Ct value 36.49, indicating a low viral load. Though her Ct value was greater than 30 and she was asymptomatic, she was transferred a Quarantine facility with the family. After 5 days she started complaining of fever headache, intermittent cough, chest pain and loose stools. She was then admitted to CDC hospital, and she was re-swabbed after 10 days and the Ct value reduced to 29.065probably indicating an increasing viral load.  When her symptoms subsided, she was transferred back to the quarantine facility.

CASE 2: A 35-year-old Yemeni male who works in a ministerial office, presented to Primary Health Care Center with symptoms of sore throat of two days duration and with history of contact with a positive case and he tested negative. After a month he was tested again due to runny nose, thirst, taste & smell loss and resulted positive with Ct value of 31.69 (indicating low viral load) and when the test was repeated after 4 days the Ct value drastically dropped to 17.23 (indicating a high viral load).

CASE 3: A 37-year-old Qatari female, who is a homemaker had contact with a positive case, developed mild upper respiratory tract infection symptoms and tested positive with Ct value of 31.15 (indicating low viral load). After 2 weeks, the PCR was repeated, and the Ct value was 29.96 (indicating a high viral load).

CASE 4: An asymptomatic 46-year-old obese Qatari female was tested for COVID after having contact with a positive case and resulted positive with Ct value of 32.7 (indicating low viral load). She is an asthmatic, a diabetic and a hypertensive. A week later she developed myalgia, dizziness and lethargy and progressed to productive cough with pleuritic chest pain when she was transferred from the quarantine facility to CDC hospital. She was admitted with COVID pneumonia and retested, when the Ct value had dropped to 25.2indicating a higher viral load.

CASE 5: A 50-year-old Jordanian male, working as an engineer in the industrial area, the first hot spot area identified during the COVID-19 outbreak in Qatar, presented to the health facility mild cough, throat pain, diarrhea and body ache. He is a known case of epilepsy, hypertension and dyslipidemia and gave no history of contact with a COVID-19 positive person. He tested negative. Ten days later he presented again with cough and fever and tested positive with Ct value of 34.39, indicating a low viral load. He was transferred to a tertiary care hospital as a case of COVID pneumonia where he was retested the next day, and the Ct value had further dropped to 29.19 indicating an increasing viral load.

CASE 6: A 27-year-old Qatari male, an asthmatic presented with dry cough and sore throat and malaise and was tested negative. Later he presented with history of contact with a COVID-19 positive person, at work and tested positive, with a Ct value of 33.35. Though asymptomatic at the time of first positive result, after a week he started feeling unwell and complained of tightness of chest, cough, sore throat and generalized body ache. On testing when he developed symptoms, the Ct value was found to be 21.5.

Discussion

Some experts suggest using RT-PCR Ct value or to calculate viral load which can help refine decision-making (shorter isolation etc) [9]. However, the evidence is not robust enough to definitively support this assumption.  Ct values can allow physicians to identify patients most at risk for severe disease and death. It can also allow contact tracing teams to triage their efforts on patients with higher infectivity and reduce the need for isolation of close contacts of patients that are not infectious. 

However, many recent discussions have pointed out several limitations about Ct values of Rt-PCR guiding the clinical decision making [10]. According to some experts, precautions are needed when interpreting the Ct values of SARS-CoV-2 RT-PCR results [11]. RT-PCR may have suboptimal sensitivity, for instance because in early stages of COVID-19 infection, the viral load is below detection limit [12]. Accuracy of the reported Ct values also depend on technical factors like how the sample has been collected, technical competence of the person performing the test, calibration of equipment and pipettes and analytical skills of the interpreters, temperature of transportation as well as time taken from collection to receipt in the laboratory. Ct values between nasal and oropharyngeal specimens collected from the same individual may differ [12].

Patients in early symptomatic stage may show a high Ct value which may subsequently change as their disease progresses. In such cases, the initial high Ct values give a false sense of security that such patients are not infectious. Several studies observed increases in viral loads prior to clinical deterioration (particularly those based on lower respiratory tract specimens) with decreases in viral load observed prior to improvement of symptoms. Occasionally, samples from asymptomatic/mild cases show Ct values like those who develop severe disease because severity of COVID-19 disease largely depends on host factors besides viral load. Some patients with low viral load may land up in very severe disease due to triggering of the immunological responses.  Hence, again high Ct value may give a false sense of security [13].

According to a recently published study, viral shedding may already begin 2-3 days before the appearance of the first symptoms [14]. In general, the highest viral loads from upper respiratory tract samples were observed at the time of symptom onset and for a few days after (generally within one week), with levels slowly decreasing over the next one to three weeks [15].  In general, viral loads from upper respiratory tract samples were observed to peak within a week of symptom onset and followed a relatively consistent downward trajectory, whereas viral loads from stool/ sputum samples were found to peak later in the disease (generally two to three weeks after symptom onset) and followed a more erratic pattern [16].

A case report of a 6-month-old infant, who was tested as part of contact tracing, noted no symptoms on admission to hospital, but a relatively high viral load (nasopharyngeal sample targeting ORF1ab-gene, peak viral load Ct value = 13.73). The viral load decreased over the next nine days, although it raised slightly when the child experienced a fever on day two of admission, before falling again once the fever resolved [17].

In the above case series, it is evident that the viral load at different time points of an infection is varying. The Ct value was higher in the beginning of the course of infection, depicting low viral load and later in the course the Ct value dropped indicating higher viral load. We can also see that the Ct value decreased as symptoms developed or worsened.

As per the revised SWICC policy on 28th June 2020, if a person is tested only once and they are classified as active / reactive and managed accordingly [8]. There is a high probability of these reactive cases becoming active category later in the course and thus management will change. Patients in early symptomatic stage may show a high Ct value which may subsequently change. In such cases, high Ct values will give a false sense of security. This will then have an impact on the containment of spread of infection to others.

Considering the recent evidence, HMC re-revised policy on 20th March 2021 states that all patients with an initial reactive test result should be reviewed and retested after 7 days to see if the symptoms have changed and whether the CT value is increasing or decreasing [18]. If the Ct value dropped to lower than 30 then the isolation was extended to another 14 days. If the Ct value on retesting, remains above 30 or turns negative then he/ she may end the isolation and continue with community engagement maintain all safety precautions and may rejoin work (if working) [18].

Further studies relating to SARS-CoV-2 detection and viral load at different time points of an infection, including in those without any symptoms, which will aid with the clinical interpretation of real-time reverse transcriptase polymerase chain reaction (rRT-PCR) test results. 

Conclusion

Since the Ct value an indirect marker of viral load changes over the course of infection, it is not recommended to rely on numerical Ct values for determining infectiousness of COVID-19 patients and deciding patient management protocols.

Ethical consideration

A waiver of all the consent was obtained vide PHCC/DCR/2020/11/131, as this research involved reviewing the reports of those positive cases who have already recovered, involved no risk to the subjects. The data were collected from patient notes for the purpose of research in an anonymized way and information regarding collected data will be kept confidential.

Recommendation

Even if the Ct value is > 30 on the initial RT-PCR it is always recommended to retest after 7 days to capture the different stages of infection and also ensure that if somebody is declared reactive, confirm he is in the later stages of infection before release from isolation; in order to curb the spread.

Funding

None.

Conflict of interest

None.

References

Clearly Auctoresonline and particularly Psychology and Mental Health Care Journal is dedicated to improving health care services for individuals and populations. The editorial boards' ability to efficiently recognize and share the global importance of health literacy with a variety of stakeholders. Auctoresonline publishing platform can be used to facilitate of optimal client-based services and should be added to health care professionals' repertoire of evidence-based health care resources.

img

Virginia E. Koenig

Journal of Clinical Cardiology and Cardiovascular Intervention The submission and review process was adequate. However I think that the publication total value should have been enlightened in early fases. Thank you for all.

img

Delcio G Silva Junior

Journal of Women Health Care and Issues By the present mail, I want to say thank to you and tour colleagues for facilitating my published article. Specially thank you for the peer review process, support from the editorial office. I appreciate positively the quality of your journal.

img

Ziemlé Clément Méda

Journal of Clinical Research and Reports I would be very delighted to submit my testimonial regarding the reviewer board and the editorial office. The reviewer board were accurate and helpful regarding any modifications for my manuscript. And the editorial office were very helpful and supportive in contacting and monitoring with any update and offering help. It was my pleasure to contribute with your promising Journal and I am looking forward for more collaboration.

img

Mina Sherif Soliman Georgy

We would like to thank the Journal of Thoracic Disease and Cardiothoracic Surgery because of the services they provided us for our articles. The peer-review process was done in a very excellent time manner, and the opinions of the reviewers helped us to improve our manuscript further. The editorial office had an outstanding correspondence with us and guided us in many ways. During a hard time of the pandemic that is affecting every one of us tremendously, the editorial office helped us make everything easier for publishing scientific work. Hope for a more scientific relationship with your Journal.

img

Layla Shojaie

The peer-review process which consisted high quality queries on the paper. I did answer six reviewers’ questions and comments before the paper was accepted. The support from the editorial office is excellent.

img

Sing-yung Wu

Journal of Neuroscience and Neurological Surgery. I had the experience of publishing a research article recently. The whole process was simple from submission to publication. The reviewers made specific and valuable recommendations and corrections that improved the quality of my publication. I strongly recommend this Journal.

img

Orlando Villarreal

Dr. Katarzyna Byczkowska My testimonial covering: "The peer review process is quick and effective. The support from the editorial office is very professional and friendly. Quality of the Clinical Cardiology and Cardiovascular Interventions is scientific and publishes ground-breaking research on cardiology that is useful for other professionals in the field.

img

Katarzyna Byczkowska

Thank you most sincerely, with regard to the support you have given in relation to the reviewing process and the processing of my article entitled "Large Cell Neuroendocrine Carcinoma of The Prostate Gland: A Review and Update" for publication in your esteemed Journal, Journal of Cancer Research and Cellular Therapeutics". The editorial team has been very supportive.

img

Anthony Kodzo-Grey Venyo

Testimony of Journal of Clinical Otorhinolaryngology: work with your Reviews has been a educational and constructive experience. The editorial office were very helpful and supportive. It was a pleasure to contribute to your Journal.

img

Pedro Marques Gomes

Dr. Bernard Terkimbi Utoo, I am happy to publish my scientific work in Journal of Women Health Care and Issues (JWHCI). The manuscript submission was seamless and peer review process was top notch. I was amazed that 4 reviewers worked on the manuscript which made it a highly technical, standard and excellent quality paper. I appreciate the format and consideration for the APC as well as the speed of publication. It is my pleasure to continue with this scientific relationship with the esteem JWHCI.

img

Bernard Terkimbi Utoo

This is an acknowledgment for peer reviewers, editorial board of Journal of Clinical Research and Reports. They show a lot of consideration for us as publishers for our research article “Evaluation of the different factors associated with side effects of COVID-19 vaccination on medical students, Mutah university, Al-Karak, Jordan”, in a very professional and easy way. This journal is one of outstanding medical journal.

img

Prof Sherif W Mansour

Dear Hao Jiang, to Journal of Nutrition and Food Processing We greatly appreciate the efficient, professional and rapid processing of our paper by your team. If there is anything else we should do, please do not hesitate to let us know. On behalf of my co-authors, we would like to express our great appreciation to editor and reviewers.

img

Hao Jiang

As an author who has recently published in the journal "Brain and Neurological Disorders". I am delighted to provide a testimonial on the peer review process, editorial office support, and the overall quality of the journal. The peer review process at Brain and Neurological Disorders is rigorous and meticulous, ensuring that only high-quality, evidence-based research is published. The reviewers are experts in their fields, and their comments and suggestions were constructive and helped improve the quality of my manuscript. The review process was timely and efficient, with clear communication from the editorial office at each stage. The support from the editorial office was exceptional throughout the entire process. The editorial staff was responsive, professional, and always willing to help. They provided valuable guidance on formatting, structure, and ethical considerations, making the submission process seamless. Moreover, they kept me informed about the status of my manuscript and provided timely updates, which made the process less stressful. The journal Brain and Neurological Disorders is of the highest quality, with a strong focus on publishing cutting-edge research in the field of neurology. The articles published in this journal are well-researched, rigorously peer-reviewed, and written by experts in the field. The journal maintains high standards, ensuring that readers are provided with the most up-to-date and reliable information on brain and neurological disorders. In conclusion, I had a wonderful experience publishing in Brain and Neurological Disorders. The peer review process was thorough, the editorial office provided exceptional support, and the journal's quality is second to none. I would highly recommend this journal to any researcher working in the field of neurology and brain disorders.

img

Dr Shiming Tang

Dear Agrippa Hilda, Journal of Neuroscience and Neurological Surgery, Editorial Coordinator, I trust this message finds you well. I want to extend my appreciation for considering my article for publication in your esteemed journal. I am pleased to provide a testimonial regarding the peer review process and the support received from your editorial office. The peer review process for my paper was carried out in a highly professional and thorough manner. The feedback and comments provided by the authors were constructive and very useful in improving the quality of the manuscript. This rigorous assessment process undoubtedly contributes to the high standards maintained by your journal.

img

Raed Mualem

International Journal of Clinical Case Reports and Reviews. I strongly recommend to consider submitting your work to this high-quality journal. The support and availability of the Editorial staff is outstanding and the review process was both efficient and rigorous.

img

Andreas Filippaios

Thank you very much for publishing my Research Article titled “Comparing Treatment Outcome Of Allergic Rhinitis Patients After Using Fluticasone Nasal Spray And Nasal Douching" in the Journal of Clinical Otorhinolaryngology. As Medical Professionals we are immensely benefited from study of various informative Articles and Papers published in this high quality Journal. I look forward to enriching my knowledge by regular study of the Journal and contribute my future work in the field of ENT through the Journal for use by the medical fraternity. The support from the Editorial office was excellent and very prompt. I also welcome the comments received from the readers of my Research Article.

img

Dr Suramya Dhamija

Dear Erica Kelsey, Editorial Coordinator of Cancer Research and Cellular Therapeutics Our team is very satisfied with the processing of our paper by your journal. That was fast, efficient, rigorous, but without unnecessary complications. We appreciated the very short time between the submission of the paper and its publication on line on your site.

img

Bruno Chauffert

I am very glad to say that the peer review process is very successful and fast and support from the Editorial Office. Therefore, I would like to continue our scientific relationship for a long time. And I especially thank you for your kindly attention towards my article. Have a good day!

img

Baheci Selen

"We recently published an article entitled “Influence of beta-Cyclodextrins upon the Degradation of Carbofuran Derivatives under Alkaline Conditions" in the Journal of “Pesticides and Biofertilizers” to show that the cyclodextrins protect the carbamates increasing their half-life time in the presence of basic conditions This will be very helpful to understand carbofuran behaviour in the analytical, agro-environmental and food areas. We greatly appreciated the interaction with the editor and the editorial team; we were particularly well accompanied during the course of the revision process, since all various steps towards publication were short and without delay".

img

Jesus Simal-Gandara

I would like to express my gratitude towards you process of article review and submission. I found this to be very fair and expedient. Your follow up has been excellent. I have many publications in national and international journal and your process has been one of the best so far. Keep up the great work.

img

Douglas Miyazaki

We are grateful for this opportunity to provide a glowing recommendation to the Journal of Psychiatry and Psychotherapy. We found that the editorial team were very supportive, helpful, kept us abreast of timelines and over all very professional in nature. The peer review process was rigorous, efficient and constructive that really enhanced our article submission. The experience with this journal remains one of our best ever and we look forward to providing future submissions in the near future.

img

Dr Griffith

I am very pleased to serve as EBM of the journal, I hope many years of my experience in stem cells can help the journal from one way or another. As we know, stem cells hold great potential for regenerative medicine, which are mostly used to promote the repair response of diseased, dysfunctional or injured tissue using stem cells or their derivatives. I think Stem Cell Research and Therapeutics International is a great platform to publish and share the understanding towards the biology and translational or clinical application of stem cells.

img

Dr Tong Ming Liu

I would like to give my testimony in the support I have got by the peer review process and to support the editorial office where they were of asset to support young author like me to be encouraged to publish their work in your respected journal and globalize and share knowledge across the globe. I really give my great gratitude to your journal and the peer review including the editorial office.

img

Husain Taha Radhi

I am delighted to publish our manuscript entitled "A Perspective on Cocaine Induced Stroke - Its Mechanisms and Management" in the Journal of Neuroscience and Neurological Surgery. The peer review process, support from the editorial office, and quality of the journal are excellent. The manuscripts published are of high quality and of excellent scientific value. I recommend this journal very much to colleagues.

img

S Munshi

Dr.Tania Muñoz, My experience as researcher and author of a review article in The Journal Clinical Cardiology and Interventions has been very enriching and stimulating. The editorial team is excellent, performs its work with absolute responsibility and delivery. They are proactive, dynamic and receptive to all proposals. Supporting at all times the vast universe of authors who choose them as an option for publication. The team of review specialists, members of the editorial board, are brilliant professionals, with remarkable performance in medical research and scientific methodology. Together they form a frontline team that consolidates the JCCI as a magnificent option for the publication and review of high-level medical articles and broad collective interest. I am honored to be able to share my review article and open to receive all your comments.

img

Tania Munoz

“The peer review process of JPMHC is quick and effective. Authors are benefited by good and professional reviewers with huge experience in the field of psychology and mental health. The support from the editorial office is very professional. People to contact to are friendly and happy to help and assist any query authors might have. Quality of the Journal is scientific and publishes ground-breaking research on mental health that is useful for other professionals in the field”.

img

George Varvatsoulias

Dear editorial department: On behalf of our team, I hereby certify the reliability and superiority of the International Journal of Clinical Case Reports and Reviews in the peer review process, editorial support, and journal quality. Firstly, the peer review process of the International Journal of Clinical Case Reports and Reviews is rigorous, fair, transparent, fast, and of high quality. The editorial department invites experts from relevant fields as anonymous reviewers to review all submitted manuscripts. These experts have rich academic backgrounds and experience, and can accurately evaluate the academic quality, originality, and suitability of manuscripts. The editorial department is committed to ensuring the rigor of the peer review process, while also making every effort to ensure a fast review cycle to meet the needs of authors and the academic community. Secondly, the editorial team of the International Journal of Clinical Case Reports and Reviews is composed of a group of senior scholars and professionals with rich experience and professional knowledge in related fields. The editorial department is committed to assisting authors in improving their manuscripts, ensuring their academic accuracy, clarity, and completeness. Editors actively collaborate with authors, providing useful suggestions and feedback to promote the improvement and development of the manuscript. We believe that the support of the editorial department is one of the key factors in ensuring the quality of the journal. Finally, the International Journal of Clinical Case Reports and Reviews is renowned for its high- quality articles and strict academic standards. The editorial department is committed to publishing innovative and academically valuable research results to promote the development and progress of related fields. The International Journal of Clinical Case Reports and Reviews is reasonably priced and ensures excellent service and quality ratio, allowing authors to obtain high-level academic publishing opportunities in an affordable manner. I hereby solemnly declare that the International Journal of Clinical Case Reports and Reviews has a high level of credibility and superiority in terms of peer review process, editorial support, reasonable fees, and journal quality. Sincerely, Rui Tao.

img

Rui Tao

Clinical Cardiology and Cardiovascular Interventions I testity the covering of the peer review process, support from the editorial office, and quality of the journal.

img

Khurram Arshad

Clinical Cardiology and Cardiovascular Interventions, we deeply appreciate the interest shown in our work and its publication. It has been a true pleasure to collaborate with you. The peer review process, as well as the support provided by the editorial office, have been exceptional, and the quality of the journal is very high, which was a determining factor in our decision to publish with you.

img

Gomez Barriga Maria Dolores

The peer reviewers process is quick and effective, the supports from editorial office is excellent, the quality of journal is high. I would like to collabroate with Internatioanl journal of Clinical Case Reports and Reviews journal clinically in the future time.

img

Lin Shaw Chin

Clinical Cardiology and Cardiovascular Interventions, I would like to express my sincerest gratitude for the trust placed in our team for the publication in your journal. It has been a true pleasure to collaborate with you on this project. I am pleased to inform you that both the peer review process and the attention from the editorial coordination have been excellent. Your team has worked with dedication and professionalism to ensure that your publication meets the highest standards of quality. We are confident that this collaboration will result in mutual success, and we are eager to see the fruits of this shared effort.

img

Maria Dolores Gomez Barriga

Dear Dr. Jessica Magne, Editorial Coordinator 0f Clinical Cardiology and Cardiovascular Interventions, I hope this message finds you well. I want to express my utmost gratitude for your excellent work and for the dedication and speed in the publication process of my article titled "Navigating Innovation: Qualitative Insights on Using Technology for Health Education in Acute Coronary Syndrome Patients." I am very satisfied with the peer review process, the support from the editorial office, and the quality of the journal. I hope we can maintain our scientific relationship in the long term.

img

Dr Maria Dolores Gomez Barriga

Dear Monica Gissare, - Editorial Coordinator of Nutrition and Food Processing. ¨My testimony with you is truly professional, with a positive response regarding the follow-up of the article and its review, you took into account my qualities and the importance of the topic¨.

img

Dr Maria Regina Penchyna Nieto

Dear Dr. Jessica Magne, Editorial Coordinator 0f Clinical Cardiology and Cardiovascular Interventions, The review process for the article “The Handling of Anti-aggregants and Anticoagulants in the Oncologic Heart Patient Submitted to Surgery” was extremely rigorous and detailed. From the initial submission to the final acceptance, the editorial team at the “Journal of Clinical Cardiology and Cardiovascular Interventions” demonstrated a high level of professionalism and dedication. The reviewers provided constructive and detailed feedback, which was essential for improving the quality of our work. Communication was always clear and efficient, ensuring that all our questions were promptly addressed. The quality of the “Journal of Clinical Cardiology and Cardiovascular Interventions” is undeniable. It is a peer-reviewed, open-access publication dedicated exclusively to disseminating high-quality research in the field of clinical cardiology and cardiovascular interventions. The journal's impact factor is currently under evaluation, and it is indexed in reputable databases, which further reinforces its credibility and relevance in the scientific field. I highly recommend this journal to researchers looking for a reputable platform to publish their studies.

img

Dr Marcelo Flavio Gomes Jardim Filho

Dear Editorial Coordinator of the Journal of Nutrition and Food Processing! "I would like to thank the Journal of Nutrition and Food Processing for including and publishing my article. The peer review process was very quick, movement and precise. The Editorial Board has done an extremely conscientious job with much help, valuable comments and advices. I find the journal very valuable from a professional point of view, thank you very much for allowing me to be part of it and I would like to participate in the future!”

img

Zsuzsanna Bene

Dealing with The Journal of Neurology and Neurological Surgery was very smooth and comprehensive. The office staff took time to address my needs and the response from editors and the office was prompt and fair. I certainly hope to publish with this journal again.Their professionalism is apparent and more than satisfactory. Susan Weiner

img

Dr Susan Weiner

My Testimonial Covering as fellowing: Lin-Show Chin. The peer reviewers process is quick and effective, the supports from editorial office is excellent, the quality of journal is high. I would like to collabroate with Internatioanl journal of Clinical Case Reports and Reviews.

img

Lin-Show Chin

My experience publishing in Psychology and Mental Health Care was exceptional. The peer review process was rigorous and constructive, with reviewers providing valuable insights that helped enhance the quality of our work. The editorial team was highly supportive and responsive, making the submission process smooth and efficient. The journal's commitment to high standards and academic rigor makes it a respected platform for quality research. I am grateful for the opportunity to publish in such a reputable journal.

img

Sonila Qirko

My experience publishing in International Journal of Clinical Case Reports and Reviews was exceptional. I Come forth to Provide a Testimonial Covering the Peer Review Process and the editorial office for the Professional and Impartial Evaluation of the Manuscript.

img

Luiz Sellmann