scholarly journals COVID-19 and oral lesions: A review

2021 ◽  
Vol 3 (3) ◽  
pp. 102-105
Author(s):  
Vinay S Dua ◽  
Amandeep Kaur ◽  
Ankit Sikri ◽  
Mitasha Sachdeva
Keyword(s):  
Clinical Symptoms ◽  
Infection Risk ◽  
Oral Lesions ◽  
Literature Overview ◽  
Global Pandemic ◽  
Airborne Contamination ◽  
High Infection ◽  
Oral Symptoms ◽  
Professional Practitioners ◽  
Dental Environment

A new coronavirus (Sars-CoV-2) was detected in China at the end of 2019 and has since caused a worldwide pandemic. This virus is responsible for an acute respiratory syndrome (COVID-19), distinguished by a potentially lethal interstitial bilateral pneumonia. As Sars-CoV-2 is highly infective through airborne contamination, the high infection risk in the dental environment is a serious problem for both professional practitioners and patients. This literature overview at analyzing various reports available on oral symptoms along with possible causation, their relationship to the time of occurrence of clinical symptoms of this global pandemic.

Outbreak of respiratory infection: nCoV-2019 current status and its impact on global health

2020 ◽  
Vol 16 ◽  
Author(s):  
Saurabh Kumar ◽  
Sandeep Kumar ◽  
Adil Karim ◽  
Kamlesh Bisht ◽  
Abdul Ghani ◽  
...  
Keyword(s):  
T Cells ◽  
Clinical Symptoms ◽  
Cytotoxic T Cells ◽  
Respiratory Illness ◽  
Current Status ◽  
Global Pandemic ◽  
High Infection ◽  
Epidemiology Data ◽  
Rapid Transmission ◽  
Novel Coronavirus

: Novel Coronavirus-2019 (nCoV-2019) emerged as a potentially infectious respiratory disease caused by newly discovered β-coronavirus. nCoV-19 has emerged as a global pandemic due to the rapid transmission and high infection rate commonly involved in acute respiratory illness. Literature search includes various databases like Google Scholar, PubMed, ScienceDirect, and Scopus for studies published using a different combination of keywords “coronavius”, “COVID-19”, “SARS”, “MERS”, “antiviral drugs”, “vaccines”, and “immunity”. We collected epidemiology data from the Worldometer portal (data available till 9 October, 2020). Fever, dry cough, dyspnea, sore throat, or fatigue are common clinical symptoms of the infection. Cytotoxic T-cells and T-helper cells Cytotoxic T cells (CD8+) accounts for maximum (approximately 80%) of total infiltrate in the pulmonary region of the affected nCoV individuals and acts as a significant contributor in the clearance of the infection. This review intends to outline the literature concerning the mode of actual transmission, immune response, and possible therapeutic approach against the virus.

scholarly journals A REVOLUTIONARY CHANGE IN THE FUTURE OF DENTISTRY ON ACCOUNT OF COVID-19

2020 ◽  
pp. 5-7
Author(s):  
Arpita Deb ◽  
Niveditha B ◽  
Kirti Saharan ◽  
Noubad Rashmi Suryakanth
Keyword(s):  
Close Contact ◽  
Infection Risk ◽  
Revolutionary Change ◽  
Dental Procedures ◽  
Airborne Contamination ◽  
The Future ◽  
Precautionary Measures ◽  
The Impact ◽  
Dental Environment ◽  
Dental Professionals

Origin of the new coronavirus (Sars‐CoV‐2), first detected in China at the end of 2019, has caused a worldwide pandemic. The panic is mainly because the virus is responsible for causing an acute respiratory syndrome (COVID‐19). Sars‐CoV‐2 has a high infectivity through airborne contamination. However, there is an increased infection risk in the dental environment as dental procedures involves a close contact with saliva, where the virus is present in greater number. This possesses a serious problem for dental professionals and patients. Therefore, this article highlights various precautionary measures to be taken to prevent the transmission of the virus from one person to another. This article also reviews extensively on the impact of Covid-19 has on the future of dentistry.

Unique nCoV-2019 (COVID 19) spike glycoprotein processing by host protease: Analysis and Implication on infection

2020 ◽  
Vol 17 ◽  
Author(s):  
Ajoy Basak ◽  
Sarmistha Basak
Keyword(s):  
World Health ◽  
Spike Glycoprotein ◽  
Binding Domains ◽  
Corona Virus ◽  
Global Pandemic ◽  
High Infection ◽  
Crucial Information ◽  
Glycoprotein Processing ◽  
Health Organization ◽  
Host Reservoir

: The current global pandemic outbreak of a novel type of corona virus termed by World Health Organization as COVID-19 became an grave concern and worry to human health and world economy. Intense research efforts are now underway worldwide to combat and prevent the spread of this deadly disease. This zoonotic virus, a native to bat population is most likely transmitted to human via a host reservoir. Due to its close similarity to previously known SARS CoV (Severe Acute Respiratory Syndrome Corona Virus) of 2002 and related MERS CoV (Middle East Respiratory Syndrome Corona Virus) of 2012, it is also known as SARS CoV2. But unlike them it is far too infectious, virulent and lethal. Among its various proteins, the surface spike glycoprotein “S” has drawn significant attention because of its implication in viral recognition and host-virus fusion process. A detail comparative analysis of “S” proteins of SARS CoV (now called SARS CoV1), SARS CoV2 (COVID-19) and MERS CoV based on structure, sequence alignment, host cleavage sites, receptor binding domains, potential glycosylation and Cys-disulphide bridge locations has been performed. It revealed some key features and variations that may elucidate the high infection and virulence character of COVID-19. Moreover this crucial information may become useful in our quest for COVID-19 therapeutics and vaccines.

scholarly journals Resuming professional football (soccer) during the COVID-19 pandemic in a country with high infection rates: a prospective cohort study

2021 ◽  
pp. bjsports-2020-103724
Author(s):  
Yorck Olaf Schumacher ◽  
Montassar Tabben ◽  
Khalid Hassoun ◽  
Asmaa Al Marwani ◽  
Ibrahim Al Hussein ◽  
...  
Keyword(s):  
Cohort Study ◽  
Prospective Cohort Study ◽  
Prospective Cohort ◽  
Preventive Measures ◽  
Clinical Symptoms ◽  
Severe Illness ◽  
Football Players ◽  
Professional Football ◽  
Infection Rates ◽  
High Infection

ObjectivesThe risk of viral transmission associated with contact sports such as football (soccer) during the COVID-19 pandemic is unknown. The aim of this study was to describe the infective and immune status of professional football players, team staff and league officials over a truncated football season resumed at the height of the COVID-19 pandemic in a country with high infection rates and to investigate the clinical symptoms related to COVID-19 infection in professional football players.MethodsProspective cohort study of 1337 football players, staff and officials during a truncated football season (9 weeks) with a tailored infection control programme based on preventive measures and regular SARS-CoV-2 PCR swab testing (every 3–5 days) combined with serology testing for immunity (every 4 weeks). Clinical symptoms in positive participants were recorded using a 26-item, Likert-Scale-based scoring system.ResultsDuring the study period, 85 subjects returned positive (cycle threshold (cT) ≤30) or reactive (30<cT<40) PCR tests, of which 36 were players. The infection rate was consistent with that of the general population during the same time period. More than half of infected subjects were asymptomatic, and the remaining had only mild symptoms with no one requiring hospitalisation. Symptom severity was associated with lower cT values. Social contacts and family were the most common sources of infection, and no infection could be traced to training or matches. Of the 36 infected players, 15 presented positive serology during the study period.ConclusionFootball played outdoors involving close contact between athletes represents a limited risk for SARS-CoV-2 infection and severe illness when preventive measures are in place.

scholarly journals Clinical characteristics and predictive value of lower CD4+T cell level in patients with moderate and severe COVID-19: a multicenter retrospective study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xue-song Wen ◽  
Dan Jiang ◽  
Lei Gao ◽  
Jian-zhong Zhou ◽  
Jun Xiao ◽  
...  
Keyword(s):  
Retrospective Study ◽  
T Cell ◽  
Lymphocyte Subsets ◽  
Clinical Symptoms ◽  
Independent Predictor ◽  
Cd4 T Cell ◽  
Hospital Death ◽  
Consecutive Series ◽  
Cell Level ◽  
Global Pandemic

Abstract Background In December 2019, coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, Hubei, China. Moreover, it has become a global pandemic. This is of great value in describing the clinical symptoms of COVID-19 patients in detail and looking for markers which are significant to predict the prognosis of COVID-19 patients. Methods In this multicenter, retrospective study, 476 patients with COVID-19 were enrolled from a consecutive series. After screening, a total of 395 patients were included in this study. All-cause death was the primary endpoint. All patients were followed up from admission till discharge or death. Results The main symptoms observed in the study included fever on admission, cough, fatigue, and shortness of breath. The most common comorbidities were hypertension and diabetes mellitus. Patients with lower CD4+T cell level were older and more often male compared to those with higher CD4+T cell level. Reduced CD8+T cell level was an indicator of the severity of COVID-19. Both decreased CD4+T [HR:13.659; 95%CI: 3.235–57.671] and CD8+T [HR: 10.883; 95%CI: 3.277–36.145] cell levels were associated with in-hospital death in COVID-19 patients, but only the decrease of CD4+T cell level was an independent predictor of in-hospital death in COVID-19 patients. Conclusions Reductions in lymphocytes and lymphocyte subsets were common in COVID-19 patients, especially in severe cases of COVID-19. It was the CD8+T cell level, not the CD4+T cell level, that reflected the severity of the patient’s disease. Only reduced CD4+T cell level was independently associated with increased in-hospital death in COVID-19 patients. Trial registration Prognostic Factors of Patients With COVID-19, NCT04292964. Registered 03 March 2020. Retrospectively registered.

scholarly journals COVID-19: Oral Manifestations-A Dentist's Perspective

2021 ◽  
Vol 5 (2) ◽  
pp. RV1-RV5
Author(s):  
Ruhee Sangha ◽  
Sumanjit ◽  
Ramandeep Sandhu ◽  
Mohit Bansal ◽  
Simran
Keyword(s):  
Health Care ◽  
Early Diagnosis ◽  
Inflammatory Response ◽  
Oral Hygiene ◽  
Acute Respiratory Infection ◽  
Facial Pain ◽  
Opportunistic Infections ◽  
Oral Lesions ◽  
Oral Manifestations ◽  
Global Pandemic

Covid-19 is a global pandemic disease which has crippled health care system and economics worldwide. According to WHO, an acute respiratory infection, fever and cough are the most valid diagnostic clinical features. Some common orofacial manifestations of this viral infection may contribute to early diagnosis of covid-19 infection. Oral manifestations include olfactory and gustatory disturbances, dry mouth, facial pain, vesicobullous lesions such as erosion, pustule, macule, papule, plaque, pigmentation and depapilliated tongue with whitish areas, hemorrhagic crust, necrosis, swelling and  erythema. The most common sites of involvement in descending order are tongue (38%), labial mucosa (26%), and palate (22%).  Oral lesions are symptomatic in 68% of the cases who test positive for SARS Co-V. Lack of oral hygiene, opportunistic infections, stress, immunosuppression, vasculitis, and hyper-inflammatory response secondary to COVID-19 are the most important predisposing factors for onset of oral lesions in COVID-19 patients.

scholarly journals Clinical characteristics and predictive value of low CD4+T cell count in patients with moderate and severe COVID-19: A multicenter retrospective study

2020 ◽  
Author(s):  
Xue-song Wen ◽  
Lei Gao ◽  
Dan Jiang ◽  
Xiao-cheng Cheng ◽  
Bin He ◽  
...  
Keyword(s):  
Retrospective Study ◽  
T Cell ◽  
Lymphocyte Subsets ◽  
Clinical Symptoms ◽  
Independent Predictor ◽  
Cd4 T Cell ◽  
Hospital Death ◽  
Consecutive Series ◽  
Global Pandemic ◽  
Cd4 T Cell Count

Abstract BackgroundIn December 2019, coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, Hubei, China. And, it has become a global pandemic. Describe the patient's clinical symptoms in detail, finding markers that predict the prognosis of patients with COVID-19 are of great value.MethodsIn this multicenter, retrospective study, 476 patients with COVID-19 were recruited from a consecutive series. After screening, a total of 395 patients were included in this study. All-cause death was the primary endpoint. All patients were followed up from admission till discharge or death.ResultsThe dominant symptoms observed in the study included fever on admission, cough, fatigue, and shortness of breath. The most frequent comorbidities were hypertension and diabetes. Compared with patients with higher CD4+T cell levels, patients with lower CD4+T cell levels were older and were more frequently male. Reduction of CD8+T cell is an indicator of the severity of COVID-19. Both decreased CD4+T cell [HR:13.659; 95%CI: 3.235-57.671] and CD8+T cell [HR: 10.883; 95%CI: 3.277-36.145] were associated with in-hospital death in COVID-19 patients, but only decreased CD4+T cell was an independent predictor of in-hospital death in COVID-19 patients.ConclusionsReductions in lymphocytes and lymphocyte subsets were common in COVID-19 patients, especially in severe cases. It was the CD8+T cell, not the CD4+T cell, that reflected the severity of the patient’s disease. Only CD4+T cell reduction was independently associated with increased in-hospital death in COVID-19 patients.Trial registration: Prognostic Factors of Patients With COVID-19, NCT04292964. Registered 03 March 2020. https://clinicaltrials.gov/ct2/show/NCT04292964.

scholarly journals Seasonal and Sexual Differences in the Microbiota of the Hoopoe Uropygial Secretion

Genes ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 407 ◽  
Author(s):  
Sonia Rodríguez-Ruano ◽  
Manuel Martín-Vivaldi ◽  
Juan Peralta-Sánchez ◽  
Ana García-Martín ◽  
Ángela Martínez-García ◽  
...  
Keyword(s):  
Breeding Season ◽  
Community Dynamics ◽  
Quantitative Polymerase Chain Reaction ◽  
Infection Risk ◽  
Uropygial Gland ◽  
Molecular Fingerprinting ◽  
Microbial Community Dynamics ◽  
High Infection ◽  
Uropygial Secretion

The uropygial gland of hoopoe nestlings and nesting females hosts bacterial symbionts that cause changes in the characteristics of its secretion, including an increase of its antimicrobial activity. These changes occur only in nesting individuals during the breeding season, possibly associated with the high infection risk experienced during the stay in the hole-nests. However, the knowledge on hoopoes uropygial gland microbial community dynamics is quite limited and based so far on culture-dependent and molecular fingerprinting studies. In this work, we sampled wild and captive hoopoes of different sex, age, and reproductive status, and studied their microbiota using quantitative polymerase chain reaction (qPCR), fluorescence in situ hybridization (FISH) and pyrosequencing. Surprisingly, we found a complex bacterial community in all individuals (including non-nesting ones) during the breeding season. Nevertheless, dark secretions from nesting hoopoes harbored significantly higher bacterial density than white secretions from breeding males and both sexes in winter. We hypothesize that bacterial proliferation may be host-regulated in phases of high infection risk (i.e., nesting). We also highlight the importance of specific antimicrobial-producing bacteria present only in dark secretions that may be key in this defensive symbiosis. Finally, we discuss the possible role of environmental conditions in shaping the uropygial microbiota, based on differences found between wild and captive hoopoes.

scholarly journals Recent Advances in DENV Receptors

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Shuyu Fang ◽  
Yanhua Wu ◽  
Na Wu ◽  
Jing Zhang ◽  
Jing An
Keyword(s):  
Endothelial Cells ◽  
Dengue Shock Syndrome ◽  
Hemorrhagic Fever ◽  
Infection Risk ◽  
Target Cells ◽  
Virus Binding ◽  
Dengue Disease ◽  
High Infection ◽  
Key Factor ◽  
Serious Disease

Dengue is an old disease caused by the mosquito-borne dengue viruses (DENVs), which have four antigenically distinct serotypes (DENV1–4). Infection by any of them can cause dengue fever (DF) and/or a more serious disease, that is, dengue hemorrhagic fever (DHF) or dengue shock syndrome (DSS). In recent decades, incidence of dengue disease has increased 30-fold, putting a third to half of the world’s population living in dengue-endemic areas at high infection risk. However, the pathogenesis of the disease is still poorly understood. The virus binding with its host cell is not only a first and critical step in their replication cycle but also a key factor for the pathogenicity. In recent years, there have been significant advances in understanding interactions of DENVs with their target cells such as dendritic cells (DC), macrophages, endothelial cells, and hepatocytes. Although DENVs reportedly attach to a variety of receptors on these cells, consensus DENV receptors have not been defined. In this review, we summarize receptors for DENVs on different cells identified in recent years.

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