scholarly journals Oral Mucosa Could Be an Infectious Target of SARS-CoV-2

Healthcare ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1068
Author(s):  
Tatsuo Okui ◽  
Yuhei Matsuda ◽  
Masaaki Karino ◽  
Katsumi Hideshima ◽  
Takahiro Kanno
Keyword(s):  
Oral Cavity ◽  
World Health ◽  
Functional Protein ◽  
Angiotensin Converting Enzyme 2 ◽  
Positive Proportion ◽  
Gingival Cells ◽  
Oral Tissue ◽  
Liquid Based Cytology ◽  
Health Organization ◽  
Respiratory Droplets

The World Health Organization reported that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission is caused by respiratory droplets and aerosols from the oral cavity of infected patients. The angiotensin-converting enzyme 2 (ACE2) is considered the host functional protein for SARS-CoV-2 infection. In this article, we first revealed that the positive proportion of ACE2 expression in gingival cells collected from the gingival sulcus was increased to the same level as the tongue. Our data demonstrate that cells in the gingival sulcus may be a new entry point for the SARS-CoV-2 virus via a high expression of ACE2. In addition, we first evaluated the expression of ACE2 in various sites of the oral cavity with noninvasive, convenient liquid-based cytology. The liquid-based cytology evaluation of oral tissue may provide a novel preventive medical avenue against COVID-19.

Coronavirus diseases and pregnancy: COVID-19,SARS, and MERS

2020 ◽  
pp. 276-289
Author(s):  
Mobina Fathi ◽  
Kimia Vakili ◽  
Niloofar Deravi
Keyword(s):  
Pregnant Women ◽  
Intrauterine Growth Retardation ◽  
Negative Impact ◽  
World Health ◽  
Wuhan City ◽  
Intrauterine Growth ◽  
Exponential Increase ◽  
The World ◽  
Health Organization ◽  
Respiratory Droplets

Around the end of December 2019, a new beta-coronavirus from Wuhan City, Hubei Province, China began to spread rapidly. The new virus, called SARS-CoV-2, which could be transmitted through respiratory droplets, had a range of mild to severe symptoms, from simple cold in some cases to death in others. The disease caused by SARS-CoV-2 was named COVID-19 by WHO and has so far killed more people than SARS and MERS. Following the widespread global outbreak of COVID-19, with more than 132758 confirmed cases and 4955 deaths worldwide, the World Health Organization declared COVID-19 a pandemic disease in January 2020. Earlier studies on viral pneumonia epidemics has shown that pregnant women are at greater risk than others. During pregnancy, the pregnant woman is more prone to infectious diseases. Research on both SARS-CoV and MERS-CoV, which are pathologically similar to SARS-CoV-2, has shown that being infected with these viruses during pregnancy increases the risk of maternal death, stillbirth, intrauterine growth retardation and, preterm delivery. With the exponential increase in cases of COVID-19 throughout the world, there is a need to understand the effects of SARS-CoV-2 on the health of pregnant women, through extrapolation of earlier studies that have been conducted on pregnant women infected with SARS-CoV, and MERS-CoV. There is an urgent need to understand the chance of vertical transmission of SARS-CoV-2 from mother to fetus and the possibility of the virus crossing the placental barrier. Additionally, since some viral diseases and antiviral drugs may have a negative impact on the mother and fetus, in which case, pregnant women need special attention for the prevention, diagnosis, and treatment of COVID-19.

Outbreak of coronavirus disease 2019 (COVID-19) and its manifestation

Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Bikash Debnath ◽  
Waikhom Somraj Singh ◽  
Kuntal Manna
Keyword(s):  
Antiviral Drug ◽  
World Health ◽  
Family Welfare ◽  
Pregnant Mother ◽  
Vaccine Candidates ◽  
The World ◽  
Mode Of Transmission ◽  
Health Organization ◽  
Effective Drugs ◽  
Respiratory Droplets

: The coronavirus disease 2019 (COVID-19) first outbreak in Wuhan, China, and the infection is intense worldwide. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for COVID-19. The World Health Organization (WHO) confirmed total deaths had noted 4.20% globally (March 21, 2020). Between the intervals of four months (July 21, 2020), confirmed total deaths had recorded 4.17%, globally. In India, 909 confirmed cases and 19 deaths were reported by Health and Family Welfare, Government of India, March 28, 2020. Between the intervals of 123 days In India, 1638870 confirmed cases and 35684 deaths. COVID-19 can potentially spread from person to person through direct contact or respiratory droplets from coughing and sneezing. The most common symptoms are fever, dry cough, difficulty in breathing, and fatigue. A pregnant mother with COVID-19 has fewer chances to transfer this infection of her newborn babies. Children have less affected than an adult. A specific antiviral drug or vaccine has not been developed to cure the disease. Chloroquine, hydroxychloroquine, lopinavir, ritonavir, nafamostat, nitazoxanide, and remdesivir have effective drugs to treat COVID-19. Many vaccine candidates are under pre-clinical and clinical studies. In this review, we highlight the epidemiology, sign-symptoms, pathogenesis, mode of transmission, and effects of a pregnant mother with newborns, children, prevention, and drugs affective to COVID-19.

Recent developments and opportunities in fighting COVID-19

Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Vikram Rao ◽  
Subrat Kumar Bhattamisra
Keyword(s):  
World Health ◽  
Diagnostic Tools ◽  
Extensive Literature ◽  
Angiotensin Converting Enzyme 2 ◽  
Recent Developments ◽  
Therapeutic Molecules ◽  
Discharged Patients ◽  
Extensive Literature Search ◽  
Repurposed Drugs ◽  
Health Organization

Background: COVID-19, a Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-Cov-2) was first diagnosed in the patients from Wuhan, China in December 2019. Within couple of months of infection, it was declared as pandemic by World health organization. COVID-19 has become the most contagious infection with a serious threat to global health. In this review, we aimed to discuss the pathogenesis, diagnostics, current treatments and potential vaccines for COVID-19. Methods: An extensive literature search was conducted using keywords “COVID-19”; “Coronavirus”; “SARS-Cov-2”; “SARS” in public domains of Google, Google scholar, PubMed, and ScienceDirect. Selected articles were used to construct this review. Results: SARS-Cov-2 uses the Spike (S) protein on its surface to recognize the receptor on angiotensin-converting enzyme 2 (ACE2) and bind with 10-folds greater affinity than SARS-Cov-1. Molecular assays and immunoassays are the most frequently used tests whereas computed tomography (CT) scans, Artificial intelligence enabled diagnostic tools were also used in patients. In therapeutic treatment, few drugs were repurposed and there are 23 therapeutic molecules including the repurposed drugs are in different stages of clinical trial. Similarly, development of vaccines is also in the pipeline. Few countries have managed well to contain the spread by rapid testing and identifying the clusters. Conclusion: Till now, the acute complications and mortality of COVID-19 has been linked to the pre-existing comorbid conditions or age. Besides the development of therapeutic strategies that includes drugs and vaccine, the long term implication of COVID-19 infection in terms of the disorder/disability in the cured/discharged patients is a new area to investigate.

scholarly journals Potential Prophylactic Treatments for COVID-19

Viruses ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1292
Author(s):  
Noam Ben-Zuk ◽  
Ido-David Dechtman ◽  
Itai Henn ◽  
Libby Weiss ◽  
Amichay Afriat ◽  
...  
Keyword(s):  
World Health ◽  
Pharmaceutical Drugs ◽  
Mild Disease ◽  
Clinical Background ◽  
Repurposed Drugs ◽  
Prophylactic Use ◽  
Health Organization ◽  
Medical Indications ◽  
Respiratory Droplets ◽  
Near Future

The World Health Organization declared the SARS-CoV-2 outbreak a Public Health Emergency of International Concern at the end of January 2020 and a pandemic two months later. The virus primarily spreads between humans via respiratory droplets, and is the causative agent of Coronavirus Disease 2019 (COVID-19), which can vary in severity, from asymptomatic or mild disease (the vast majority of the cases) to respiratory failure, multi-organ failure, and death. Recently, several vaccines were approved for emergency use against SARS-CoV-2. However, their worldwide availability is acutely limited, and therefore, SARS-CoV-2 is still expected to cause significant morbidity and mortality in the upcoming year. Hence, additional countermeasures are needed, particularly pharmaceutical drugs that are widely accessible, safe, scalable, and affordable. In this comprehensive review, we target the prophylactic arena, focusing on small-molecule candidates. In order to consolidate a potential list of such medications, which were categorized as either antivirals, repurposed drugs, or miscellaneous, a thorough screening for relevant clinical trials was conducted. A brief molecular and/or clinical background is provided for each potential drug, rationalizing its prophylactic use as an antiviral or inflammatory modulator. Drug safety profiles are discussed, and current medical indications and research status regarding their relevance to COVID-19 are shortly reviewed. In the near future, a significant body of information regarding the effectiveness of drugs being clinically studied for COVID-19 is expected to accumulate, in addition to information regarding the efficacy of prophylactic treatments.

scholarly journals Endothelial activation and dysfunction in COVID-19: from basic mechanisms to potential therapeutic approaches

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuefei Jin ◽  
Wangquan Ji ◽  
Haiyan Yang ◽  
Shuaiyin Chen ◽  
Weiguo Zhang ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Endothelial Activation ◽  
World Health ◽  
Therapeutic Approaches ◽  
Inflammatory Reactions ◽  
Angiotensin Converting Enzyme 2 ◽  
Therapeutic Implications ◽  
Endothelial Inflammation ◽  
The World ◽  
Health Organization

AbstractOn 12 March 2020, the outbreak of coronavirus disease 2019 (COVID-19) was declared a pandemic by the World Health Organization. As of 4 August 2020, more than 18 million confirmed infections had been reported globally. Most patients have mild symptoms, but some patients develop respiratory failure which is the leading cause of death among COVID-19 patients. Endothelial cells with high levels of angiotensin-converting enzyme 2 expression are major participants and regulators of inflammatory reactions and coagulation. Accumulating evidence suggests that endothelial activation and dysfunction participate in COVID-19 pathogenesis by altering the integrity of vessel barrier, promoting pro-coagulative state, inducing endothelial inflammation, and even mediating leukocyte infiltration. This review describes the proposed cellular and molecular mechanisms of endothelial activation and dysfunction during COVID-19 emphasizing the principal mediators and therapeutic implications.

scholarly journals Occupational health risk among healthcare workers during COVID-19 pandemic: actions to limit the risk

2021 ◽  
Vol 96 (1) ◽  
Author(s):  
Eman Casper
Keyword(s):  
Occupational Health ◽  
Health Risk ◽  
Healthcare Workers ◽  
World Health ◽  
High Morbidity ◽  
Wuhan City ◽  
Coronavirus Infection ◽  
Health Organization ◽  
Respiratory Droplets ◽  
Very High

AbstractThe World Health Organization declared coronavirus infection 2019 (COVID-19) as a pandemic in March 2020. The infection with coronavirus started in Wuhan city, China, in December 2019. As of October 2020, the disease was reported in 235 countries. The coronavirus infection 2019 (COVID-19) is a disease with high morbidity and mortality. As of February 2021, the number of confirmed cases of COVID-19 globally is 102,942,987 and 2,232,233 deaths according to WHO report. This infection is caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), which is a ribonucleic acid (RNA) β-coronavirus. The infection is mainly transmitted through respiratory droplets.Healthcare workers (HCWs) play an essential role at the front lines, providing care for patients infected with this highly transmittable disease. They are exposed to very high occupational health risk as they frequently contact the infective persons. In order to limit the number of infected cases and deaths among healthcare workers, it is crucial to have better awareness, optimistic attitude, efficient PPE, and adequate health practices about COVID-19.

Aftermath of Covid -19 Pandemic in the community

2021 ◽  
pp. 498-500
Author(s):  
Sholly. CK
Keyword(s):  
World Health Organization ◽  
Antiviral Treatment ◽  
World Health ◽  
Health Concern ◽  
Severe Illness ◽  
Respiratory Illnesses ◽  
The World ◽  
Novel Coronavirus ◽  
Health Organization ◽  
Respiratory Droplets

Novel corona virus (COVID-19) is an infectious condition, which can be spread directly or indirectly from one person to another and causes respiratory illnesses, range from common cold to acute respiratory syndrome. The first cases of this virus were found in Wuhan, China. According to the World Health Organization, COVID-19 is serious health concern and has higher risk for severe illness and spreading rapidly all over the world.This novel coronavirus was named Coronavirus Disease 2019 (COVID-19) by WHO in February 2020. The World Health Organization (WHO) has declared the coronavirus disease 2019 a pandemic, in the year2020 March. A global coordinated effort is needed to stop the further spread of the virus. Among all cases about 92% of the confirmed cases were recorded from China. Initial reports suggest that death rate ranges from 1% to 2% which varies in the study and country. The most of the death have occurred in patients over 50 years of age followed by young children. For the confirmed cases which included both laboratory and clinically diagnosed till now there is no specific antiviral treatment recommended but there is vaccine currently available. Once the virus develops in people, corona viruses can be spread from person to person through respiratory droplets. The viral material hangs out in these droplets and can be breathed into the respiratory tract, where the virus can then lead to an infection. Repercussions of Covid -19 on individuals, families and on front line warriors are countless1.

scholarly journals Preliminary study of coronavirus disease 2019 on pets in pandemic in Denpasar, Bali, Indonesia

2021 ◽  
pp. 2979-2983
Author(s):  
Hamong Suharsono ◽  
Ali Ghufron Mukti ◽  
Ketut Suryana ◽  
I. Wayan Masa Tenaya ◽  
Dilasdita Kartika Pradana ◽  
...  
Keyword(s):  
Close Contact ◽  
Genetic Material ◽  
Rna Isolation ◽  
World Health ◽  
Intermediate Hosts ◽  
Rt Pcr ◽  
Pcr Products ◽  
Preliminary Study ◽  
Health Organization ◽  
Respiratory Droplets

Background and Aim: Coronavirus disease 2019 (COVID-19) is an acute infectious respiratory disease caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and has spread rapidly globally, resulting in a pandemic. In humans, the main routes of transmission are respiratory droplets and close contact with infected individuals or through contact with an object infected with the virus, followed by touching mouth, nose, or eyes. It is assumed that SARS-CoV-2 was originated in wild animals and was then transmitted to humans. Although some wildlife and domestic animals can be naturally or experimentally infected with the virus, the intermediate hosts that transmitted it to humans are still unknown. Understanding the dynamics of SARS-CoV-2 associated with possible zoonotic transmission of intermediate hosts is considered critical. Reportedly, cats or dogs living with COVID-19-positive humans tested positive for the disease, suggesting that the virus was transmitted to the animals from humans. Information regarding the epidemiological investigation and comprehensive studies is limited. Therefore, it is still unclear how high is the correlation of infection in humans and pet animals, especially those living together. The aim of this study was to investigate the possibility of SARS-CoV-2 infection in the pets of patients with COVID-19 who were hospitalized at the Wangaya hospital, Denpasar, Bali, Indonesia. Materials and Methods: A total of seven clinically asymptomatic pets (six dogs of different races and sexes and a cat [age, 360-2920 days]) were included in this study. These animals belonged to patients with confirmed SARS-CoV-2 infection from August to November 2020. Nasal swab and nasopharyngeal samples were collected from the pets individually under anesthetic condition and were collected 6-12 days after confirmed SARS-CoV-2 infection in owners and hospitalization at the Wangaya Hospital. The swab samples were then processed for RNA isolation and tested using reverse transcription-polymerase chain reaction (RT-PCR) for SARS-CoV-2, in accordance with the World Health Organization manual 2020. Results: RT-PCR results for all seven RNA samples, prepared from the swab samples, were negative. For the samples, all PCR products were below the threshold limit, suggesting no genetic material belonging to the samples tested. Conclusion: This was the first preliminary study of COVID-19 on pets in pandemic using RT-PCR. The study tested a very limited quantity of samples, and all of them were negative. However, the way in which the samples were prepared was considered appropriate. Therefore, in further studies, testing of more samples of pets of more individuals with confirmed SARS-CoV-2 infection is required.

scholarly journals Air Pollution and COVID-19: The Role of Particulate Matter in the Spread and Increase of COVID-19’s Morbidity and Mortality

2020 ◽  
Vol 17 (12) ◽  
pp. 4487 ◽  
Author(s):  
Silvia Comunian ◽  
Dario Dongo ◽  
Chiara Milani ◽  
Paola Palestini
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Close Contact ◽  
Atmospheric Particulate Matter ◽  
World Health ◽  
Angiotensin Converting Enzyme 2 ◽  
Positive Correlation ◽  
Pulmonary Cells ◽  
Health Organization

Sars-Cov-2 virus (COVID-19) is a member of the coronavirus family and is responsible for the pandemic recently declared by the World Health Organization. A positive correlation has been observed between the spread of the virus and air pollution, one of the greatest challenges of our millennium. COVID-19 could have an air transmission and atmospheric particulate matter (PM) could create a suitable environment for transporting the virus at greater distances than those considered for close contact. Moreover, PM induces inflammation in lung cells and exposure to PM could increase the susceptibility and severity of the COVID-19 patient symptoms. The new coronavirus has been shown to trigger an inflammatory storm that would be sustained in the case of pre-exposure to polluting agents. In this review, we highlight the potential role of PM in the spread of COVID-19, focusing on Italian cities whose PM daily concentrations were found to be higher than the annual average allowed during the months preceding the epidemic. Furthermore, we analyze the positive correlation between the virus spread, PM, and angiotensin-converting enzyme 2 (ACE2), a receptor involved in the entry of the virus into pulmonary cells and inflammation.

scholarly journals Sex hormones as an emerging weapon to combat COVID-19

2021 ◽  
Vol 5 (2) ◽  
pp. 01-03
Author(s):  
Dattatreya Mukherjee
Keyword(s):  
Close Contact ◽  
Virus Detection ◽  
World Health ◽  
Rapid Screening ◽  
Global Level ◽  
Rna Detection ◽  
Highly Pathogenic ◽  
Novel Coronavirus ◽  
Health Organization ◽  
Respiratory Droplets

Coronavirus disease 2019 (COVID-19) started as an epidemic in Wuhan in 2019 and was declared pandemic by WHO in March 2020. The virus has been identified and named as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This novel coronavirus strain is the causative agent of COVID-19, and continues to rapidly spread worldwide. SARS-CoV-2 is a highly pathogenic and transmissible coronavirus that spreads through respiratory droplets and unprotected close contact. “COVID‑19 outbreak, which has caused >95 million confirmed infections and >2 million coronavirus related deaths, is one of the most disastrous worldwide crises in recent years. Several methods have been used to examine SARS-CoV-2 infections.” i.e. RT-qPCR for viral RNA detection, and rapid screening procedures for antibody or virus detection. COVID-19 shows an incubation period of 3–7 days globally. Approximately 80% of the cases remain mild or asymptomatic, 15% are severe and 5% infectious cases turn to critical, requiring ventilation [2]. Several clinical trials have been proposed for its treatment and management with supportive aim of mortality reduction [1]. By glancing a view on fig 1, it can be evidently seen that COVID-19 cases have started to rise significantly since last few months. Furthermore, as per World Health Organization (WHO), there have been 131,020,967 confirmed cases of COVID-19 at a global level recently.

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