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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is spreading globally. Generally, the viral genome becomes undetectable within a couple of weeks after infection. Herein, we report a case of long-term detection of the SARS-CoV-2 genome in the same individual for 106 days. Whole genome sequencing was performed on specimens taken at the onset of the disease and 2 months after onset, and the B.1.1.7 lineage was detected in both samples. A comparison of the full-length sequences revealed a single-base difference and no amino acid mutations. This is the first case in Japan where the virus was detected over a long period, and the full-length sequences were compared.
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http://dx.doi.org/10.7883/yoken.JJID.2021.841 | DOI Listing |
J Infect Public Health
September 2025
Department of Nursing, College of Nursing and Health Sciences, Jazan University, Jazan 82911, Saudi Arabia; School of Medicine, Universidad Espiritu Santo, Samborondon 091952, Ecuador. Electronic address:
Introduction: Hajj is the largest annual mass gathering in the world, attracting more than 2 million pilgrims from 184 countries. Adverse climatic conditions and close proximity of pilgrims during Hajj rituals create a facilitating environment for the transmission of infectious agents, including multi-drug resistant organisms. Although, several individual reports have been published on specific type of infections, there is a paucity of published work reflecting the overall picture of the prevalence of pathogenic infections during Hajj.
View Article and Find Full Text PDFMed Sci Monit
September 2025
Departament of Virology, National Institute of Public Health, National Institute of Hygiene - National Research Institute, Warsaw, Poland.
BACKGROUND The SENTINEL influenza surveillance system has been used in Poland since 2004, incorporating both epidemiological and virological monitoring of influenza viruses. SENTINEL works in cooperation with general practitioners, 16 Voivodship Sanitary Epidemiological Stations (VSES), and the National Influenza Centre (NIC). NON-SENTINEL samples are collected from places that do not participate in the SENTINEL program.
View Article and Find Full Text PDFVaccine
September 2025
Brighton Collaboration, The Task Force for Global Health, Atlanta, GA, United States of America.
Vaccine safety surveillance systems are vital for the post-market safety monitoring of novel and well-established vaccines, given the sample size, representativeness and follow-up time in clinical trials. The introduction of COVID-19 vaccines during the SARS-CoV-2 pandemic presented unprecedented challenges for safety surveillance. Here, we discuss methodologic considerations for epidemiologic study design and real world data for passive and active surveillance systems for COVID-19 vaccines in the United States (U.
View Article and Find Full Text PDFAutoimmunity
December 2025
Medicinal Genomics, Beverly, MA, USA.
For some of the COVID-19 vaccines, the drug substances released to market were manufactured differently than those used in clinical trials. Manufacturing nucleoside-modified mRNA (modRNA) for commercial COVID-19 vaccines relies on RNA polymerase transcription of a plasmid DNA template. Previous studies identified high levels of plasmid DNA in vials of modRNA vaccines, suggesting that the removal of residual DNA template is problematic.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
College of Chemistry and Molecular Sciences, Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, 430072, P.R. China.
Peptide-based biosensors are widely used for in vitro detection of protease activity but often suffer from the limited sensitivity, poor accuracy, and incompatibility with point-of-care testing (POCT) devices. Herein, we developed a versatile deoxyribozyme (DNAzyme)-amplified protease-sensing (DP) platform that integrates the positively charged oligopeptides with a negatively charged DNAzyme biocatalyst for highly-sensitive protease detection. The system leverages the electrostatic peptide-DNAzyme interactions to inhibit DNAzyme catalytic activity, which is reactivated upon the protease-triggered peptide hydrolysis, thus enabling an efficient signal amplification via the successive cleavage of DNAzyme substrate.
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