Objective: The aim of this study was to investigate the infectiousness of re-positive coronavirus disease 2019 (COVID-19) patients.
Methods: All nucleic acid testing (NAT) was performed using throat swabs, nasopharyngeal swabs, and anal swabs, which were tested by Fluorescent quantitative realtime PCR. Re-positive cases were defined as a discharged patient who re-tested positive by NAT. Micro-neutralization of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was performed based on the methods for severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) viruses. IgM and IgG against the N protein of SARS-CoV-2 were determined by ELISA.
Results: A total 255 (16.04%) of 1590 COVID-19 patients were re-positive. The re-positive cases were more likely to occur in patients in the 20-39 years age group and in patients with disease of moderate severity. Quantitative PCR showed that cycle threshold (Ct) values and viral loads were both far lower than in the hospitalized COVID-19 patients. The viral load in re-positive cases was very low. Viral culture of the samples from re-positive patients showed no cytopathic effect, and NAT of the culture medium of viral cultures all exhibited negative results.
Conclusion: The viral load in re-positive cases was very low; patients were not infectious and the risk of human-to-human transmission was extremely low. Discharged COVID-19 patients should undergo home health management for 3 weeks.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8358082 | PMC |
| http://dx.doi.org/10.1016/j.ijid.2021.08.019 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
New-onset refractory status epilepticus after SARS-CoV-2 infection: a review of literature.
Croat Med J
December 2024
Athanasios, Nafpliou 1 C, Gerakas 15344, Athens, Greece,
Although severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) primarily affects the respiratory system, neurological symptoms were reported both during acute and post-acute COVID-19. Notably, patients with no history of epilepsy or other neurological conditions developed new-onset refractory status epilepticus (NORSE) weeks, months, or even up to a year following the viral infection. While NORSE is uncommon, it carries a high mortality rate and can result in permanent epilepsy.
View Article and Find Full Text PDFLung long distance: histopathological changes in lung tissue after COVID-19 pneumonia.
Croat Med J
December 2024
Grgur Salai, University Hospital Dubrava, Avenija Gojka Šuška 6, 10000 Zagreb, Croatia,
Aim: To investigate histopathological changes in the lung tissue of long-COVID patients.
Methods: In this cross-sectional study, transbronchial lung biopsy was performed in long-COVID patients with persisting symptoms and radiological abnormalities. Histopathologic analyses were performed by using hematoxylin-eosin, Martius, Scarlet and Blue, Movat's, thyroid transcription factor 1, CD34, and CD68 staining.
Subacute thyroiditis - Is it really linked to viral infection? Retrospective hospital patient registry study.
J Clin Endocrinol Metab
January 2025
Institute of Virology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
Objective: Subacute thyroiditis (SAT) is a painful inflammatory disorder of the thyroid gland, which - after a phase of thyrotoxicosis - leads to transient, or less frequently permanent hypothyroidism. Apart from a strong association with specific HLA alleles, the causes are uncertain. Viral disease has been hypothesised as a trigger, with Enteroviruses, namely Echoviruses and Coxsackieviruses, showing a seasonal distribution that coincides with the incidence of SAT.
View Article and Find Full Text PDFAssessment of clinical characteristics and mortality in patients hospitalized with SARS-CoV-2 from January 2022 to November 2022, when Omicron variants were predominant in the United States.
Curr Med Res Opin
January 2025
Pfizer Inc., US Medical Affairs, New York, NY, USA.
Objective: To describe the demographic/clinical characteristics, treatment patterns, and mortality among patients hospitalized with COVID-19 during Omicron predominance by immunocompromised and high-risk status.
Methods: Retrospective observational study of patients hospitalized with COVID-19 between January 1, 2022 and November 30, 2022, using data from the Optum de-identified Clinformatics® Data Mart Database. Patient demographic/clinical characteristics, treatments, mortality and costs, were assessed, during the emergence of BA.
Difference in the epidemiological and clinical profiles of mortality between the first and second waves of COVID-19 pandemic in a tertiary care hospital of Andaman and Nicobar Islands.
J Educ Health Promot
November 2024
Department of Community and Family Medicine, AIIMS, Deoghar, Jharkhand, India.
Background: The Andaman and Nicobar Islands reported the first coronavirus disease 2019 (COVID-19) case on March 26, 2020. This study aimed to describe the epidemiological and clinical profiles of COVID-19 mortality that occurred during the first and second waves of COVID-19 pandemic and to compare the differences between them.
Materials And Methods: This was a retrospective cohort study carried out among COVID-19 patients admitted at GB Pant Hospital, Port Blair.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!