scholarly journals A 6-Year-Old Boy with COVID-19-Positive Pleural Effusion and Kawasaki-Like Features

2021 ◽  
Vol 2021 ◽  
pp. 1-3
Author(s):  
Sedigheh Yousefzadegan ◽  
Ramin Zare Mahmoudabadi ◽  
Golnaz Gharehbaghi
Keyword(s):  
Pleural Fluid ◽  
Signs And Symptoms ◽  
Elisa Test ◽  
The Novel ◽  
Pleural Effusions ◽  
Rt Pcr ◽  
Igg Antibody ◽  
Antibody Elisa ◽  
Novel Coronavirus ◽  
Inflammatory Syndrome

The ongoing outbreak of the novel coronavirus (SARS-CoV-2) has exposed many pediatric patients from around the world to coronavirus disease. Although pleural effusions are classified as atypical features of COVID-19 infection, we report a 6-year-old boy who had a positive IgG antibody ELISA test for COVID-19 and presented with respiratory distress, bilateral pleural effusions, and signs and symptoms of multisystem inflammatory syndrome. The RT-PCR test of the pleural fluid specimen was positive for novel coronavirus. To our knowledge, this is the first pediatric report of a COVID-19-positive pleural fluid.

scholarly journals SARS-CoV-2: preliminary study of infected human nasopharyngeal tissue by high resolution microscopy

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Brian Mondeja ◽  
Odalys Valdes ◽  
Sonia Resik ◽  
Ananayla Vizcaino ◽  
Emilio Acosta ◽  
...  
Keyword(s):  
High Resolution ◽  
Control Sample ◽  
Negative Control ◽  
High Rate ◽  
Apical Region ◽  
The Novel ◽  
Rt Pcr ◽  
Crown Shape ◽  
Novel Coronavirus ◽  
High Resolution Microscopy

Abstract Background The novel coronavirus SARS-CoV-2 is the etiological agent of COVID-19. This virus has become one of the most dangerous in recent times with a very high rate of transmission. At present, several publications show the typical crown-shape of the novel coronavirus grown in cell cultures. However, an integral ultramicroscopy study done directly from clinical specimens has not been published. Methods Nasopharyngeal swabs were collected from 12 Cuban individuals, six asymptomatic and RT-PCR negative (negative control) and six others from a COVID-19 symptomatic and RT-PCR positive for SARS CoV-2. Samples were treated with an aldehyde solution and processed by scanning electron microscopy (SEM), confocal microscopy (CM) and, atomic force microscopy. Improvement and segmentation of coronavirus images were performed by a novel mathematical image enhancement algorithm. Results The images of the negative control sample showed the characteristic healthy microvilli morphology at the apical region of the nasal epithelial cells. As expected, they do not display virus-like structures. The images of the positive sample showed characteristic coronavirus-like particles and evident destruction of microvilli. In some regions, virions budding through the cell membrane were observed. Microvilli destruction could explain the anosmia reported by some patients. Virus-particles emerging from the cell-surface with a variable size ranging from 80 to 400 nm were observed by SEM. Viral antigen was identified in the apical cells zone by CM. Conclusions The integral microscopy study showed that SARS-CoV-2 has a similar image to SARS-CoV. The application of several high-resolution microscopy techniques to nasopharyngeal samples awaits future use.

scholarly journals The Novel Coronavirus 2019 (COVID-19): A Narrative Review

2020 ◽  
Vol 1 (2) ◽  
pp. 15-52
Author(s):  
Baratali Rezapour ◽  
Sayed Jalil Musavi ◽  
Faezeh Shirzadeh Maleki
Keyword(s):  
Food Chain ◽  
Signs And Symptoms ◽  
Viral Disease ◽  
Zoonotic Diseases ◽  
The Body ◽  
Behavioral Characteristics ◽  
The Novel ◽  
Ecological Characteristics ◽  
Novel Coronavirus ◽  
Key Steps

One of the key steps in determining how to prevent the viral disease is to identify the virus. The virus lives in different ways and in different environments. It lives in the air, in the sea, on plants, animals and objects and humans. Some people put humans on the path of developing zoonotic diseases that are specific to animals but also involve people with unhealthy behaviors. In the food chain, each animal is hunted by other animals and feeds on other animals or plants and other objects. Bacteriophages are viruses that kill bacteria. And there are creatures that kill viruses and this is the biological struggle with viruses. When the virus enters the body, it performs a series of activities that lead to a series of symptoms in the patient. These symptoms include the behavior of viruses. These are among the ecological and behavioral characteristics of viruses that need to be fully understood in order to limit viruses and deal with epidemics and pandemics. In this study, we try to reach a conclusion by reviewing the articles that have information about the behavioral (signs and symptoms) and ecological characteristics of viruses and use these findings in order to combat viruses.

scholarly journals A blueprint for academic laboratories to produce SARS-CoV-2 quantitative RT-PCR test kits

2020 ◽  
Vol 295 (46) ◽  
pp. 15438-15453 ◽  
Author(s):  
Samantha J. Mascuch ◽  
Sara Fakhretaha-Aval ◽  
Jessica C. Bowman ◽  
Minh Thu H. Ma ◽  
Gwendell Thomas ◽  
...  
Keyword(s):  
Support Group ◽  
Diagnostic Testing ◽  
The Novel ◽  
Rt Pcr ◽  
Research Teams ◽  
Environmental Testing ◽  
Resource Limited ◽  
Test Kit ◽  
Institute Of Technology ◽  
Novel Coronavirus

Widespread testing for the presence of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in individuals remains vital for controlling the COVID-19 pandemic prior to the advent of an effective treatment. Challenges in testing can be traced to an initial shortage of supplies, expertise, and/or instrumentation necessary to detect the virus by quantitative RT-PCR (RT-qPCR), the most robust, sensitive, and specific assay currently available. Here we show that academic biochemistry and molecular biology laboratories equipped with appropriate expertise and infrastructure can replicate commercially available SARS-CoV-2 RT-qPCR test kits and backfill pipeline shortages. The Georgia Tech COVID-19 Test Kit Support Group, composed of faculty, staff, and trainees across the biotechnology quad at Georgia Institute of Technology, synthesized multiplexed primers and probes and formulated a master mix composed of enzymes and proteins produced in-house. Our in-house kit compares favorably with a commercial product used for diagnostic testing. We also developed an environmental testing protocol to readily monitor surfaces for the presence of SARS-CoV-2. Our blueprint should be readily reproducible by research teams at other institutions, and our protocols may be modified and adapted to enable SARS-CoV-2 detection in more resource-limited settings.

Role of aquaporin water channels in pleural fluid dynamics

2000 ◽  
Vol 279 (6) ◽  
pp. C1744-C1750 ◽  
Author(s):  
Yuanlin Song ◽  
Baoxue Yang ◽  
Michael A. Matthay ◽  
Tonghui Ma ◽  
A. S. Verkman
Keyword(s):  
Pleural Fluid ◽  
Water Transport ◽  
Water Channels ◽  
Pleural Space ◽  
Parietal Pleura ◽  
Pleural Effusions ◽  
Wild Type ◽  
Rt Pcr ◽  
Fluid Accumulation ◽  
Osmotic Equilibration

Continuous movement of fluid into and out of the pleural compartment occurs in normal chest physiology and in pathophysiological conditions associated with pleural effusions. RT-PCR screening and immunostaining revealed expression of water channel aquaporin-1 (AQP1) in microvascular endothelia near the visceral and parietal pleura and in mesothelial cells in visceral pleura. Comparative physiological measurements were done on wild-type vs. AQP1 null mice. Osmotically driven water transport was measured in anesthetized, mechanically ventilated mice from the kinetics of pleural fluid osmolality after instillation of 0.25 ml of hypertonic or hypotonic fluid into the pleural space. Osmotic equilibration of pleural fluid was rapid in wild-type mice (50% equilibration in <2 min) and remarkably slowed by greater than fourfold in AQP1 null mice. Small amounts of AQP3 transcript were also detected in pleura by RT-PCR, but osmotic water transport was not decreased in AQP3 null mice. In spontaneously breathing mice, the clearance of isosmolar saline instilled in the pleural space (∼4 ml · kg−1· h−1) was not affected by AQP1 deletion. In a fluid overload model produced by intraperitoneal saline administration and renal artery ligation, the accumulation of pleural fluid (∼0.035 ml/h) and was not affected by AQP1 deletion. Finally, in a thiourea toxicity model of acute endothelial injury causing pleural effusions and lung interstitial edema, pleural fluid accumulation in the first 3 h (∼4 ml · kg−1· h−1) was not affected by AQP1 deletion. These results indicate rapid osmotic equilibration across the pleural surface that is facilitated by AQP1 water channels. However, AQP1 does not appear to play a role in clinically relevant mechanisms of pleural fluid accumulation or clearance.

scholarly journals An atypical case: RT-PCR-negative, sero-positive covid-19 patient

Pneumologia ◽  
2020 ◽  
Vol 69 (2) ◽  
pp. 107-114
Author(s):  
William Suriady ◽  
Andika Chandra Putra ◽  
Wiwien Heru Wiyono ◽  
Mohammad Fahmi Alatas ◽  
Bettia Bermawi ◽  
...  
Keyword(s):  
False Negative ◽  
Severe Pneumonia ◽  
World Health ◽  
Diagnostic Process ◽  
The Novel ◽  
Rt Pcr ◽  
Atypical Case ◽  
Polymerase Chain ◽  
Novel Coronavirus ◽  
Health Organization

Abstract The novel coronavirus disease-2019 (COVID-19), caused by the severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2), has become a public health emergency of international concern. The first confirmed COVID-19 case in Indonesia was announced on 2 March 2020, and later on, 11,192 confirmed cases were reported as of 3 May. The World Health Organization has stated that performing a real-time reverse transcription–polymerase chain reaction (RT-PCR) specific for SARS-CoV-2 on specimens from the upper and the lower respiratory tracts, especially nasopharyngeal and oropharyngeal swabs, is the standard diagnostic procedure for COVID-19. In Indonesia, we also use other diagnostic tests, such as rapid antibody tests specific for SARS-CoV-2. Herein, we report an atypical case of COVID-19 and describe the diagnostic process, the clinical course, with progression to severe pneumonia on Week 3 of illness and the case management. We also try to highlight the possibility of false-negative RT-PCR tests.

scholarly journals Recurrence of COVID-19 related symptoms and viral detection in patient discharged after complete recovery and test negativization

2021 ◽  
Author(s):  
Chiara Vassallo ◽  
Francesca Pupo ◽  
Luca Marri ◽  
Chiara Schiavi ◽  
Francesca Giusti ◽  
...  
Keyword(s):  
Complete Recovery ◽  
Viral Reactivation ◽  
Nasopharyngeal Swab ◽  
Double Negative ◽  
The Novel ◽  
Lung Involvement ◽  
Rt Pcr ◽  
Pcr Assay ◽  
Virus Escape ◽  
Novel Coronavirus

Since the novel coronavirus disease 2019 (COVID-19) has declared pandemic, the possibility of recurrence of the disease after recovery has become a debated issue. We report a case of an 84-yearsold male patient who was admitted to our hospital for dyspnea and fever. Lab and clinical workout showed that he had COVID-19. After a full recovery of symptoms and a double negative nasopharyngeal swab of SARS-CoV-2 by RT-PCR assay, he was dismissed from the hospital. One month later, he developed again dyspnea and fever with lung involvement. Surprisingly, nasopharyngeal swab of SARS-CoV-2 was positive. Since he denied contacts with confirmed or suspected cases of COVID-19, he probably experienced a reactivation of a persistent infection. The failed eradication of the virus could depend on both virus’ escape mechanisms and dysfunctional immune response. Further studies are needed to confirm the hypothesis of viral reactivation and to identify signs of an incomplete clearance.

scholarly journals Development and Evaluation of A CRISPR-based Diagnostic For 2019-novel Coronavirus

2020 ◽  
Author(s):  
Tieying Hou ◽  
Weiqi Zeng ◽  
Minling Yang ◽  
Wenjing Chen ◽  
Lili Ren ◽  
...  
Keyword(s):  
Single Copy ◽  
Health Concern ◽  
The Novel ◽  
Rt Pcr ◽  
Clinical Sensitivity ◽  
Reverse Transcription Pcr ◽  
Technology Platforms ◽  
Novel Virus ◽  
Novel Coronavirus ◽  
High Degree

BackgroundThe recent outbreak of infections by the 2019 novel coronavirus (2019-nCoV), the third zoonotic CoV has raised great public health concern. The demand for rapid and accurate diagnosis of this novel pathogen brought significant clinical and technological challenges. Currently, metagenomic next-generation sequencing (mNGS) and reverse-transcription PCR (RT-PCR) are the most widely used molecular diagnostics for 2019-nCoV.Methods2019-nCoV infections were confirmed in 52 specimens by mNGS. Genomic information was analyzed and used for the design and development of an isothermal, CRISPR-based diagnostic for the novel virus. The diagnostic performance of CRISPR-nCoV was assessed and also compared across three technology platforms (mNGS, RT-PCR and CRISPR)Results2019-nCoVs sequenced in our study were conserved with the Wuhan strain, and shared certain genetic similarity with SARS-CoV. A high degree of variation in the level of viral RNA was observed in clinical specimens. CRISPR-nCoV demonstrated a near single-copy sensitivity and great clinical sensitivity with a shorter turn-around time than RT-PCR.ConclusionCRISPR-nCoV presents as a promising diagnostic option for the emerging pathogen.

scholarly journals COVID-19 Pandemic in the Disguise of Multi System Inflammatory Syndrome in Children: A Case Series

2021 ◽  
Author(s):  
Anahita Sanaei Dashti ◽  
Kamyar Ebrahimi ◽  
Reza Shahriarirad ◽  
Shabnam Hajiani Ghotbabadi ◽  
Shiva Aminnia
Keyword(s):  
Tertiary Care ◽  
Case Series ◽  
Organ Damage ◽  
The Novel ◽  
Number Of Children ◽  
Public Crisis ◽  
Novel Coronavirus ◽  
Atypical Presentations ◽  
Inflammatory Syndrome

Abstract Although nearly a year has passed since the emerge of the SARS-CoV-2 virus, with it, a serious and novel pediatric condition called children's multisystem inflammatory syndrome (MIS-C) has subsequently emerged. In order to achieve a better understanding and management of the disease, documentation and reporting of atypical cases is justified, particularly with the growing number of children with inflammatory syndrome with clinical features simulating MIS during the ongoing COVID-19 pandemic. Based on similar reports from numerous countries with temporal relation to COVID-19 infection in the community, it is essential for general pediatricians to be on alert for such atypical presentations and early referral to tertiary care should be considered as appropriate. Here we four cases of Multisystem Inflammatory Syndrome (MIS) during the COVID-19 pandemic. Early diagnosis and treatment of patients meeting full or partial criteria for MIS are critical to preventing end-organ damage and other long-term complications, especially during times of public crisis and global health emergencies, such as the novel coronavirus pandemic.

scholarly journals Persistence of SARS-COV-2 in body fluids: a bystander or whistle blower

2020 ◽  
Author(s):  
Ishani Bora ◽  
Sanjib Gogoi ◽  
Vaishnavi Venkatasubramanian ◽  
Roshan Mathew ◽  
Ritin Mohindra
Keyword(s):  
Clinical Improvement ◽  
Body Fluids ◽  
The Novel ◽  
Test Results ◽  
Rt Pcr ◽  
Clinical Recovery ◽  
Novel Virus ◽  
Novel Coronavirus ◽  
Government Authority ◽  
Pcr Test

The novel Coronavirus COVID-19 is wrecking a havoc across the globe and has been declared as a pandemic by WHO. Apart from transmission and shedding of the virus through respiratory secretions in the form of droplets (mainly), several studies have shown the presence of the virus in various samples such as stool, urine and occasionally in blood, semen, tears and breastmilk. Whereas government authority guidelines consider a person as cured from COVID-19 when along with clinical improvement no more virus can be detected primarily on respiratory samples along with clinical improvement; the persistence of the virus in these body fluids even after clinical recovery and negative RT-PCR test results on respiratory samples, has raised many questions about the elusive nature of this novel virus along with the possibility of other routes of transmission of this virus in the community. Although studies performed till now across the globe on persistence of SARSCOV-2 in various body fluids are sparse, in this review we would like to present and analyse the results of those studies performed globally on the aforesaid topic to get a better insight of this side of the COVID-19 story.

scholarly journals Preparation for Quarantine on the Cruise Ship Diamond Princess in Japan due to COVID-19 (Preprint)

2020 ◽  
Author(s):  
Yoshihiro Yamahata ◽  
Ayako Shibata
Keyword(s):  
Large Scale ◽  
Emerging Infectious Diseases ◽  
The Novel ◽  
Cruise Ship ◽  
Rt Pcr ◽  
Ventilator Support ◽  
Cruise Ships ◽  
Asymptomatic Patients ◽  
The Future ◽  
Novel Coronavirus

BACKGROUND Japan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020. OBJECTIVE We aim to describe the medical activities initiated and difficulties in implementing quarantine on a cruise ship. METHODS Reverse transcription–polymerase chain reaction (RT-PCR) tests for SARS-CoV-2 were performed for all 3711 people (2666 passengers and 1045 crew) on board. RESULTS Of those tested, 696 (18.8%) tested positive for coronavirus disease (COVID-19), of which 410 (58.9%) were asymptomatic. We also confirmed that 54% of the asymptomatic patients with a positive RT-PCR result had lung opacities on chest computed tomography. There were many difficulties in implementing quarantine, such as creating a dividing traffic line between infectious and noninfectious passengers, finding hospitals and transportation providers willing to accept these patients, transporting individuals, language barriers, and supporting daily life. As of March 8, 2020, 31 patients (4.5% of patients with positive RT-PCR results) were hospitalized and required ventilator support or intensive care, and 7 patients (1.0% of patients with positive RT-PCR results) had died. CONCLUSIONS There were several difficulties in implementing large-scale quarantine and obtaining medical support on the cruise ship. In the future, we need to prepare for patients’ transfer and the admitting hospitals when disembarking the passengers. We recommend treating the crew the same way as the passengers to control the infection. We must also draw a plan for the future, to protect travelers and passengers from emerging infectious diseases on cruise ships.

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