This study aimed to determine if the crossing point of the initial positive SARS-CoV-2 PCR test correlated with patient demographics, subsequent hospitalization, or duration of positivity. Seventy-three patients with two or more positive PCR tests had a median time of 23 days to two consecutive negative results.
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http://dx.doi.org/10.1016/j.jmii.2020.08.020 | DOI Listing |
Mikrobiyol Bul
January 2025
Kocaeli Üniversitesi Tıp Fakültesi, Tıbbi Mikrobiyoloji Anabilim Dalı, Kocaeli.
Son yıllarda pandemi nedeniyle virüslerin tanı ve tedavisine yönelik terapötik yöntemlerin geliştirilmesi ve antivirallerin test edilmesi amacıyla çok sayıda in vitro çalışma yapılmaktadır. Literatürde SARS-CoV-2'nin modellenebilmesi için HCoV-229E'nin kullanımının güvenli ve yeterli olup olmadığını inceleyen çalışmalar sınırlıdır. Bu sebeple bu çalışmada, BSL-2 şartlarında gerçekleştirilebilen HCoV-229E kültürü ve kantitasyon çalışmalarının, BSL-3 şartları gerektiren SARS-CoV-2 deneylerinde bir ön çalışma modeli olup olamayacağının antiviral etkinlik analizleri üzerinden araştırılması amaçlanmıştır.
View Article and Find Full Text PDFJMIR Public Health Surveill
January 2025
Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, United States.
Background: Numerous studies have assessed the risk of SARS-CoV-2 exposure and infection among health care workers during the pandemic. However, far fewer studies have investigated the impact of SARS-CoV-2 on essential workers in other sectors. Moreover, guidance for maintaining a safely operating workplace in sectors outside of health care remains limited.
View Article and Find Full Text PDFEmerg Microbes Infect
January 2025
Institute for Medical Virology, Goethe University, University Hospital Frankfurt, Frankfurt am Main, Germany.
Viremia defined as detectable SARS-CoV-2 RNA in the blood is a potential marker of disease severity and prognosis in COVID-19 patients. Here, we determined the frequency of viremia in serum of two independent COVID-19 patient cohorts within the German National Pandemic Cohort Network (German: tionales andemie horten etzwerk, NAPKON) with diagnostic RT-PCR against SARS-CoV-2. A cross-sectional cohort with 1,122 COVID-19 patients (German: , SUEP) and 299 patients recruited in a high-resolution platform with patients at high risk to develop severe courses (German: , HAP) were tested for viremia.
View Article and Find Full Text PDFFront Epidemiol
January 2025
GHI One Health Colombia, Universidad Nacional de Colombia, Medellín, Colombia.
Objectives: Surveillance of acute respiratory infection (ARI) informs vaccination, preventive, and management decisions. In many countries, immunofluorescence is the cornerstone for ARI surveillance. We aimed to determine the effect of adding multiplex polymerase chain reaction (mPCR) to conventional surveillance in ARI.
View Article and Find Full Text PDFPNAS Nexus
January 2025
Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Here, we present Link-Seq, a highly efficient droplet microfluidic method for combined sequencing of antibody-encoding genes and the transcriptome of individual B cells at large scale. The method is based on 3' barcoding of the transcriptome and subsequent single-molecule PCR in droplets, which freely shift the barcode along specific gene regions, such as the antibody heavy- and light-chain genes. Using the immune repertoire of COVID-19 patients and healthy donors as a model system, we obtain up to 91.
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