Corpus overview


Overview

MeSH Disease

Human Phenotype

Pneumonia (131)

Fever (97)

Cough (75)

Severe infection (40)

Fatigue (31)


Transmission

Seroprevalence
    displaying 21 - 30 records in total 794
    records per page




    Clinical course and management of 73 hospitalized moderate patients with COVID-19 outside Wuhan

    Authors: Xiaojuan Peng; Qi Qi Liu; Zhaolin Chen; Guiyan Wen; Qing Li; Yanfang Chen; Jie Xiong; Xinzhou Meng; Yuanjin Ding; Ying Shi; Shaohui Tang

    doi:10.21203/rs.3.rs-76135/v1 Date: 2020-09-11 Source: ResearchSquare

    Background: Moderate cases account for the majority in patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection MESHD and can also progress to severe/critical condition. Here, we investigated the clinical course and management of hospitalized moderate SARS-CoV-2 patients.Methods: The medical records and follow-up data were analyzed from the SARS-CoV-2 patients outside Wuhan.Results: A total of 73 moderate patients (38 men, 35 women) were included, with median age TRANS of 47.0 (38.5-57.5) years. Among them, only one patient (1.4%) died using active treatment to improve symptoms. The median duration of the four main symptoms cough HP, fever HP fever MESHD, chest tightness HP chest tightness MESHD, and fatigue HP fatigue MESHD were about 1-2 weeks; the median duration of the positive nucleic acid test (NAT) results for SARS-CoV-2 was slightly more than 2 weeks; the median hospitalization time was almost four weeks in 72 moderate survivors. The duration of cough HP cough MESHD and fever HP fever MESHD was positively correlated with the duration of the positive NAT results. On admission, 50% had lymphopenia HP lymphopenia MESHD; less than 30% had abnormal blood SERO biochemistry findings involving hyperglycemia HP hyperglycemia MESHD, liver function and myocardial enzymes. At discharge, the laboratory indexes were substantially improved. Two weeks after discharge, 5.6% survivors experienced a recurrence of the positive NAT results. Conclusions: Moderate SARS-CoV-2 patients have a good prognosis by the active treatment. After discharge, it is necessary that moderate survivors undergo at least a 2-week collective medical observation in quarantine places, which can identify and treat a proportion of patients with re-positive NAT results and to prevent the spread of the potential sources of infection MESHD.

    Tracheal tube obstruction MESHD due to hemoptysis HP associated with pulmonary infarction MESHD in a patient with severe COVID-19 pneumonia HP pneumonia MESHD: A case report.

    Authors: Takaaki Maruhashi; Yutaro Kurihara; Tatsuhiko Wada; Mayuko Osada; Marina Oi; Tomonari Masuda; Kunihiro Yamaoka; Yasushi Asari

    doi:10.21203/rs.3.rs-75925/v1 Date: 2020-09-11 Source: ResearchSquare

    Background: The incidence of thrombotic complications MESHD is extremely high among severe coronavirus disease MESHD 2019(COVID-19) patients in the intensive care unit. Various factors such as a cytokine storm due to an excessive immune response to inflammation MESHD, hypoxemia HP hypoxemia MESHD, and disseminated intravascular coagulation HP intravascular coagulation MESHD are considered predisposing factors for thrombotic complications MESHD.Case presentation: A 55-year-old Japanese man intubated 8 days previously was referred to our hospital because of a severe COVID-19 pneumonia HP pneumonia MESHD diagnosis after his pharyngeal swab tested positive for severe acute respiratory syndrome MESHD coronavirus 2 using reverse transcription-polymerase chain reaction. The patient continued to remain hypoxic (PaO2/FiO2 ratio <100 mmHg) at the referring hospital. On admission, we initiated veno-venous extracorporeal membrane oxygenation (VV-ECMO). Unfractionated heparin and nafamostat mesylate were used as anticoagulants during VV-ECMO. Despite the adequate anticoagulant therapy, he developed pulmonary infarction MESHD due to pulmonary embolism HP pulmonary embolism MESHD followed by hemoptysis HP. On day 10 following admission, his oxygen saturation dropped from 95% to 88%, with a marked decrease in his ventilator tidal volume, accompanied by an inability to ventilate the patient. Thereafter, we increased the VV-ECMO flow and exchanged his endotracheal tube. The lumen of the removed tracheal tube was found to be occluded by a large-sized blood SERO coagulum. There was no further episode of tube occlusion MESHD. The patient was discharged in a walkable state on day 39 following admission. Conclusions: Endotracheal tube obstruction MESHD secondary to hemoptysis HP should be suggested in patients with COVID-19 requiring ventilator support, as they are not able to perform frequent endotracheal tube suctions owing to the risk of infection TRANS risk of infection TRANS infection MESHD.

    Molecular basis for SARS-CoV-2 spike affinity for human ACE2 receptor

    Authors: Julian M. Delgado; Nalvi Duro; David M. Rogers; Alexandre Tkatchenko; Sagar A. Pandit; Sameer Varma; Sarah K Hilton; John Huddleston; Rachel Eguia; Katharine HD Crawford; Adam S Dingens; Rachel S Nargi; Rachel E Sutton; Naveenchandra Suryadevara; Paul W Rothlauf; Zhuoming Liu; Sean PJ Whelan; Robert H Carnahan; James E Crowe Jr.; Jesse D Bloom; Miles P Davenport; Stephen J Kent

    doi:10.1101/2020.09.10.291757 Date: 2020-09-10 Source: bioRxiv

    Severe acute respiratory syndrome coronavirus-2 MESHD (SARS-CoV-2) has caused substantially more infections MESHD, deaths, and economic disruptions than the 2002-2003 SARS-CoV MESHD. The key to understanding SARS-CoV-2's higher infectivity may lie in its host receptor recognition mechanism. This is because experiments show that the human ACE2 protein, which serves as the primary receptor for both CoVs, binds to CoV-2's spike protein 5-20 fold stronger than SARS-CoV's spike MESHD protein. The molecular basis for this difference in binding affinity, however, remains unexplained and, in fact, a comparison of X-ray structures leads to an opposite proposition. To gain insight, we use all-atom molecular dynamics simulations. Free energy calculations indicate that CoV-2's higher affinity is due primarily to differences in specific spike residues that are local to the spike-ACE2 interface, although there are allosteric effects in binding. Comparative analysis of equilibrium simulations reveals that while both CoV and CoV-2 spike-ACE2 complexes have similar interfacial topologies, CoV-2's spike protein engages in greater numbers, combinatorics and probabilities of hydrogen bonds and salt bridges with ACE2. We attribute CoV-2's higher affinity to these differences in polar contacts, and these findings also highlight the importance of thermal structural fluctuations in spike-ACE2 complexation. We anticipate that these findings will also inform the design of spike-ACE2 peptide blockers that, like in the cases of HIV MESHD and Influenza, can serve as antivirals.

    Functionalized TiO2 nanotube-based Electrochemical Biosensor for Rapid Detection of SARS-CoV-2 MESHD

    Authors: Bhaskar Sravan Vadlamani; Timsy Uppal; Subhash C Verma; Manoranjan Misra; Maria Christina Creel-Bulos; Christine L Kempton; Milad Sharifpour; Manila Gaddh; Roman Sniecinski; Cheryl L Maier; Fadi Nahab; Lars Heggelund; Kaj Blennow; Henrik Zetterberg; Hanne Flinstad Harbo; Niclas Johansson; Max Bell; Karin Lore; Anna Farnert; Anna Smed-Sorensen

    doi:10.1101/2020.09.07.20190173 Date: 2020-09-09 Source: medRxiv

    The coronavirus disease (COVID-19) is a newly emerging viral disease MESHD caused by severe acute respiratory syndrome coronavirus 2 MESHD (SARS-CoV-2). Rapid increase in the number of COVID-19 cases worldwide led the WHO declare pandemic within a few month after the first case of infection MESHD. Due to the lack of a prophylactic measure to control the virus infection MESHD and spread, early diagnosis and quarantining of infected as well as the asymptomatic TRANS individuals are necessary for the containment of this pandemic. However, the current methods for SARS-CoV-2 diagnosis are expensive and time consuming although some promising and inexpensive technologies are coming out for emergency use. In this work, we report the synthesis of a cheap yet highly sensitive cobalt-functionalized TiO2 nanotubes (Co-TNTs)-based electrochemical biosensor and its efficacy for rapid detection of spike glycoprotein of SARS-CoV-2 by examining S-RBD protein as the reference material. A simple, low-cost, and one-step electrochemical anodization route was used to synthesize TNTs, followed by an incipient wetting method for cobalt functionalization of the TNTs platform, which is connected to a potentiostat for data collection. The sensor specifically detected the S-RBD protein of SARS-CoV-2 even at very low concentration (range of 14 nM to 1400 nM). Additionally, our sensor showed linear response in the detection of viral protein with concentration. In summary, our Co-TNT sensor is highly effective in detecting SARS-CoV-2 S-RBD MESHD protein in approximately 30 seconds, which can be explored for developing a point of care diagnostics for rapid detection of SARS-CoV-2 in nasal secretions or saliva samples.

    Small molecules inhibit SARS-COV-2 induced aberrant inflammation MESHD and viral replication in mice by targeting S100A8/A9-TLR4 axis

    Authors: Qirui Guo; Yingchi Zhao; Junhong Li; Jiangning Liu; Chuan Qin; Xiangxi Wang; Fuping You; Xuefei Guo; Zeming Zhang; Lili Cao; Yujie Luo; Xiao Wang; Xuemei Wei; Luoying Chen; Linlin Bao; Wei Deng; Hua Zhu; Ran Gao; Ilayda Tolu; Esra Ayan; Busra Yuksel; Ayse Buket Peksen; Oktay Gocenler; Ali Doga Yucel; Ozgur Can; Serena Ozabrahamyan; Alpsu Olkan; Ece Erdemoglu; Fulya Aksit; Gokhan Haci Tanisali; Oleksandr M. Yefanov; Anton Barty; Alexandra Tolstikova; Gihan K. Ketawala; Sabine Botha; E. Han Dao; Brandon Hayes; Mengning Liang; Matthew H Seaberg; Mark S. Hunter; Alex Batyuk; Valerio Mariani; Zhen Su; Frederic Poitevin; Chun Hong Yoon; Christopher J. Kupitz; Raymond G. Sierra; Edward H Snell; Hasan DeMirci

    doi:10.1101/2020.09.09.288704 Date: 2020-09-09 Source: bioRxiv

    The SARS-CoV-2 pandemic poses an unprecedented public health crisis. Accumulating evidences suggest that SARS-CoV-2 infection MESHD causes dysregulation of immune HP system. However, the unique signature of early immune responses remains elusive. We characterized the transcriptome of rhesus macaques and mice infected with SARS-CoV-2. Alarmin S100A8 was robustly induced by SARS-CoV-2 in animal models as well as in COVID-19 patients. Paquinimod, a specific inhibitor of S100A8/A9, could reduce inflammatory response and rescue the pneumonia HP pneumonia MESHD with substantial reduction of viral titers in SASR-CoV-2 infected MESHD animals. Remarkably, Paquinimod treatment resulted in 100% survival of mice in a lethal model of mouse coronavirus (MHV) infection MESHD. A novel group of neutrophils that contributed to the uncontrolled inflammation MESHD and onset of COVID-19 were dramatically induced by coronavirus infections MESHD. Paquinimod treatment could reduce these neutrophils and regain antiviral responses, unveiling key roles of S100A8/A9 and noncanonical neutrophils in the pathogenesis of COVID-19, highlighting new opportunities for therapeutic intervention.

    Diagnosis of Coronavirus disease MESHD by measuring serum SERO concentrations of IL-6 and blood SERO Ferritin

    Authors: Parviz Yazdanpanah; Farzad Vafaei; Saeed Javdansirat; Jalal pouranfard; Sajad Afrouz

    doi:10.21203/rs.3.rs-74750/v1 Date: 2020-09-09 Source: ResearchSquare

    Objectives: Coronavirus disease MESHD 2019 (COVID-19) associated by infection MESHD and high death rate. The unresolved questions about the fatality rate of COVID-19 is most probably related to cytokine storm syndrome. There is currently no specific medication. Understanding the pathogenic pathway of this disease will lead to production of treatment and decreases of death MESHD rate. The aim of this study is to investigate changes of peripheral blood SERO parameters (Interleukin-6 and Ferritin) in COVID-19 patients, which may be beneficial in the management of patients.Methods: In this case-control study, we collected data of 270 subjects in two groups including 133 patients with severe type COVID-19 (case) and 137 patients with nonsevere (control) between March 20 and May 21, 2020, and the clinical symptoms and inflammatory indications of patients diagnosed by laboratory test in Shahid Jalil hospital of Yasuj University of medical Sciences were collected to explore potential markers for disease monitoring. The data were analyzed by SPSS software version 20. Descriptive statistics, T-test and bivariate correlation tests were used to analyze. Results: The enrolled COVID-19 patients consisted of 53.4% males TRANS and 46.6% females TRANS with the medium age TRANS of 45.56±18.55 years and there were 50.04% males TRANS and 49.6% females TRANS with the medium age TRANS of 45.59±17.0 years for non COVID-19 patients. There was no significant difference in the age TRANS and sex ratio between two population under study. The proportion interstitial abnormalities MESHD evidenced by CT imaging in COVID-19 patients was 91.0%, while, 4.4% abnormalities was found in non COVID-19 patients. The frequency of positive RT-PCR test for case and control groups were 88.0% and 3.6%, respectively. The mean IL-6 and Ferritin levels and hematological parameters in two groups of patients with COVID-19 and non- COVID-19, were significantly different across all comparisons.There was a direct positively correlated between serum SERO level of IL-6, Ferritin levels and hematological parameters including WBC, Lymphocytes, Neutrophils and Hb, except for platelets (negatively correlate),  with COVID-19. Conclusions: In conclusion, inflammatory markers specifically IL-6 and Ferritin and hematological parameters (WBC, Lymphocytes, Neutrophils, Platelet and Hb) were correlated with the severity of COVID-19. Measurement of IL-6, Ferritin and hematological MESHD indices might be workable tests to diagnosis and prognosis of patients with COVID-19. 

    Many bat species are not potential hosts of SARS-CoV MESHD and SARS-CoV-2: Evidence from ACE2 receptor usage

    Authors: Huan Yan; Hengwu Jiao; Qianyun Liu; Zhen Zhang; Xin Wang; Ming Guo; Bing-Jun Wang; Ke Lan; Yu Chen; Huabin Zhao

    doi:10.1101/2020.09.08.284737 Date: 2020-09-08 Source: bioRxiv

    Bats are the suggested natural hosts for severe acute respiratory syndrome coronavirus (SARS-CoV) and SARS-CoV-2 MESHD, the latter of which caused the coronavirus disease MESHD 2019 (COVID-19) pandemic. The interaction of viral Spike proteins with their host receptor angiotensin-converting enzyme 2 (ACE2) is a critical determinant of potential hosts and cross-species transmission TRANS. Here we use virus-host receptor binding and infection MESHD assays to show that ACE2 orthologs from 24, 21, and 16 of 46 phylogenetically diverse bat species, including those in close and distant contact with humans, do not support entry of SARS-CoV MESHD, SARS-CoV-2, and both of these coronaviruses, respectively. Furthermore, we used genetic and functional analyses to identify genetic changes in bat ACE2 receptors associated with viral entry restrictions. Our study demonstrates that many, if not most, bat species are not potential hosts of SARS-CoV MESHD and SARS-CoV-2, and provides important insights into pandemic control and wildlife conservation.

    Antibody SERO Responses to SARS-CoV-2 in Coronavirus Diseases MESHD 2019 Patients with Different Severity

    Authors: Ekasit Kowitdamrong; Thanyawee Puthanakit; Watsamon Jantarabenjakul; Eakachai Prompetchara; Pintip Suchartlikitwong; Opass Putcharoen; Nattiya Hirankarn; Ke Lan; Yu Chen; Huabin Zhao

    doi:10.1101/2020.09.06.20189480 Date: 2020-09-08 Source: medRxiv

    Background: More understanding of antibody SERO responses in the SARS-CoV-2 infected MESHD population is useful for vaccine development. Aim: To investigate SARS-CoV-2 IgA MESHD and IgG among COVID-19 Thai patients with different severity. Methods: We used plasma SERO from 118 adult TRANS patients who have confirmed SARS-CoV-2 infection MESHD and 49 patients under investigation without infection MESHD, 20 patients with other respiratory infections MESHD, and 102 healthy controls. Anti-SARS-CoV-2 IgA and IgG were performed by enzyme-linked immunosorbent assay SERO from Euroimmun. The optical density ratio cut off for positive test was 1.1 for IgA and 0.8 for IgG. The association of antibody SERO response with the severity of diseases and the day of symptoms was performed. Results: From Mar 10 to May 31, 2020, 289 participants were enrolled, and 384 samples were analyzed. Patients were categorized by clinical manifestations to mild (n=59), moderate (n=27) and severe (n=32). The overall sensitivity SERO of IgA and IgG from samples collected after day 7 is 87.9% (95% CI 79.8-93.6) and 84.8% (95% CI 76.2-91.3), respectively. The severe group had a significantly higher level of specific IgA and IgG to S1 antigen compared to the mild group. All moderate to severe patients have specific IgG while 20% of the mild group did not have any IgG detected after two weeks. Interestingly, SARS-CoV-2 IgG level was significantly higher in males TRANS compared to females TRANS among the severe group (p=0.003). Conclusion: The serologic test SERO for SARS-CoV-2 has high sensitivity SERO after the second week after onset of illness. Serological response differs among patients with different severity and different sex.

    Spatial Distribution and Time Series Analysis of COVID-19 Pandemic in Italy: A Geospatial Perspective

    Authors: Muhammad Farhan Ul Moazzam; Tamkeen Urooj Paracha; Ghani Rahman; Byung Gul Lee; Nasir Farid; Adnan Arshad

    doi:10.21203/rs.3.rs-73628/v1 Date: 2020-09-07 Source: ResearchSquare

    The novel coronavirus pandemic disease MESHD (COVID-19) affected the whole globe, though there is lack of clinical studies and its epidemiological features. But as per the observation, it has been seen that most of COVID-19 infected MESHD patients show mild to moderate symptoms and they get better without any medical assistance due to better immune system to generate antibodies SERO against the novel coronavirus. In this study the active cases, serious cases, recovered cases, deaths MESHD and total confirmed cases TRANS have been analyzed using geospatial technique (IDW) with the time span of 2nd March to 3rd June 2020. As on 3rd June the total number of COVID-19 cases in Italy were 231,238, total deaths 33,310, serious cases 350, recovered cases 158,951 and active cases were 39,177 which has been reported by the Ministry of health, Italy. March 2nd – June 3rd 2020 a sum of 231, 238 cases has been reported in Italy out of which 38.68% cases reported in Lombardia region with death rate of 18% which is high from its national mortality rate followed by Emilia-Romagna (14.89% deaths), Piemonte (12.68% deaths), and Vento (10% deaths). As per the total cases in the region, the highest number of recoveries has been observed in Umbria (92.52%), followed by Basilicata (87%), Valle d'Aosta (86.85%) and Trento (84.54%).  The COVID-19 evolution in Italy has been particularly found in the major urban area i.e. Rome, Milan, Naples, Bologna and Florence. Geospatial technology played a vital role in this pandemic by tracking infected patient, active cases, and the recovered cases. Thus, monitoring and planning using geospatial technique is very important to control COVID-19 spread in the country.

    Utility of Olfactory test as screening tool for COVID-19: A pilot study

    Authors: Pragyanshu Khare; Atul Munish Chander; Kanhaiya Agrawal; Satyam Singh Jayant; Soham Mukherjee; Kamalendra Yadav; Rahul Gupta; Shakun Chaudhary; Sumit Srivastava; Sanuj Muralidharan; Rijin Mohan; Shikha Chaudhary; Rimesh Pal; Sandeep Bansal; Kanthi Kiran Kondepudi; Govardhan Dutt Puri; MAHENDRA BISHNOI; Sanjay Kumar Bhadada

    doi:10.1101/2020.09.03.20187294 Date: 2020-09-05 Source: medRxiv

    Loss of smell function ( Anosmia HP Anosmia MESHD) is reported to be associated with novel coronavirus disease MESHD 2019 (COVID-19) infection MESHD. The present study was designed to evaluate the effectiveness of an indigenously developed prototype smell test to identify/diagnose asymptomatic TRANS COVID-19 positive individuals. A panel of five different odorants belonging to Indian household with unique and mutually exclusive odor were used to develop prototype kit to test the hypothesis. The developed prototype kit was tested at 2 centers (N=49 and 34) with slight modifications. Simultaneously, the kit was also tested on 55 (N=35 and 20) healthy controls. Our results indicate that otherwise asymptomatic TRANS COVID-19 positive individuals were having quantifiable deficit in smell sensation. Interestingly, the variable sensitivity SERO of different odorants was observed in different patients. None of the healthy controls reported difficulty in sensing any of the odorant, whereas, some of healthy controls did misidentify the odorants. Overall, the present study provides a preliminary data that loss in smell sensation for various odorants can be exploited as a quick and affordable screening test to identify infected cases among at risk individuals.

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MeSH Disease
Human Phenotype
Transmission
Seroprevalence


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