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1.
biorxiv; 2023.
Preprint in English | bioRxiv | ID: ppzbmed-10.1101.2023.05.10.540101

ABSTRACT

Background: Pregnancy being immune compromised state, COVID-19 disease poses a high risk of premature delivery and threat to fetus. Plasma metabolome regulates immune cellular responses and we aimed to analyze the plasma secretome, metabolome, and immune cells in COVID-19-positive pregnant mothers and cord blood. Methods: COVID-19 RT-PCR positive pregnant females (n=112) asymptomatic (n=82), or with mild (n=21) or moderate (n=9) disease and control healthy pregnant (n=10) females were included. Mothers blood and cord blood (n=80) was analyzed for untargeted metabolome profiling and plasma cytokines by high-resolution mass spectrometry (MS) and multiplex cytokine bead array. Immune scan in mothers was done using flow cytometry. Results: In asymptomatic SARS-CoV-2 infection, the amino acid metabolic pathways such as glycine, serine, L-lactate, and threonine metabolism was upregulated, riboflavin and tyrosine metabolism, downregulated. In mild to moderate disease, the pyruvate and NAD+ metabolism (energy metabolic pathways) were mostly altered. In addition to raised TNF-alpha, IFN-alpha, IFN-gamma, IL-6 cytokine storm, IL-9 was increased in both mothers and neonates. Pyruvate and NAD+ metabolic pathways along with IL-9 and IFN-gamma had an impact on non-classical monocytes, increased CD4 T cells and B cells but depleted CD8+ T cells. Cord blood mimicked the mothers metabolomic profiles by showing altered valine, leucine, isoleucine, glycine, serine, threonine in asymptomatic and NAD+ and riboflavin metabolism in mild and moderate disease subjects. Conclusions: Our results demonstrate a graduated immune-metabolomic interplay in mother and fetus in pregnant females with different degrees of severity of COVID-19 disease. IL-9 and IFN- gamma regulated pyruvate, lactate TCA metabolism, and riboflavin metabolism with context to disease severity are hallmarks of this materno-fetal metabolome.


Subject(s)
COVID-19 , Riboflavin Deficiency
2.
PLoS One ; 18(3): e0272381, 2023.
Article in English | MEDLINE | ID: covidwho-2267498

ABSTRACT

OBJECTIVE: To determine the clinical manifestations, risk factors, treatment modalities and maternal outcomes in pregnant women with lab-confirmed COVID-19 and compare it with COVID-19 negative pregnant women in same age group. DESIGN: Multicentric case-control study. DATA SOURCES: Ambispective primary data collection through paper-based forms from 20 tertiary care centres across India between April and November 2020. STUDY POPULATION: All pregnant women reporting to the centres with a lab-confirmed COVID-19 positive result matched with controls. DATA QUALITY: Dedicated research officers extracted hospital records, using modified WHO Case Record Forms (CRF) and verified for completeness and accuracy. STATISTICAL ANALYSIS: Data converted to excel files and statistical analyses done using STATA 16 (StataCorp, TX, USA). Odds ratios (ORs) with 95% confidence intervals (CI) estimated using unconditional logistic regression. RESULTS: A total of 76,264 women delivered across 20 centres during the study period. Data of 3723 COVID positive pregnant women and 3744 age-matched controls was analyzed. Of the positive cases 56·9% were asymptomatic. Antenatal complications like preeclampsia and abruptio placentae were seen more among the cases. Induction and caesarean delivery rates were also higher among Covid positive women. Pre-existing maternal co-morbidities increased need for supportive care. There were 34 maternal deaths out of the 3723(0.9%) positive mothers, while covid negative deaths reported from all the centres were 449 of 72,541 (0·6%). CONCLUSION: Covid-19 infection predisposed to adverse maternal outcomes in a large cohort of Covid positive pregnant women as compared to the negative controls.


Subject(s)
Abruptio Placentae , COVID-19 , Pregnancy , Humans , Female , COVID-19/epidemiology , Case-Control Studies , India/epidemiology , Mothers
4.
Indian J Crit Care Med ; 27(2): 127-131, 2023 Feb.
Article in English | MEDLINE | ID: covidwho-2245256

ABSTRACT

Introduction: We conducted basic hands-on training in oxygen therapy and ventilatory management of coronavirus disease-2019 (COVID-19) patients to health care workers (HCWs) at our tertiary care hospital. We designed this study aiming to find out the impact of hands-on training in oxygen therapy for COVID-19 patients on the knowledge and degree of retention of this gained knowledge 6 weeks after the training session among HCWs. Materials and methods: The study was conducted after obtaining approval from the Institutional Ethics Committee. A structured questionnaire consisting of 15 multiple-choice questions was given to the individual HCW. This was followed by a structured 1-hour training session on "Oxygen therapy in COVID-19", following which the same questionnaire was given to the HCWs with the questions in a different order. After 6 weeks, the same questionnaire with questions in a different format was sent to the participants as a Google form. Results: A total of 256 responses were obtained for the pre-training test and post-training test. The median [IQR] pre-training test scores and post-training test scores were 8 [7-10] and 12 [10-13], respectively. The median retention score was 11 [9-12]. The retention scores were significantly higher than the pre-test scores. Conclusion: About 89% of the HCWs had a significant gain of knowledge. About 76% of the HCWs were able to retain knowledge, which also means the training program was successful. A definitive improvement in baseline knowledge was observed after 6 weeks of training. We propose conducting reinforcement training after 6 weeks of primary training to further augment retention. How to cite this article: Singh A, Salhotra R, Bajaj M, Saxena AK, Sharma SK, Singh D, et al. Retention of Knowledge and Efficacy of a Hands-on Training Session in Oxygen Therapy for COVID-19 among Healthcare Workers. Indian J Crit Care Med 2023;27(2):127-131.

5.
biorxiv; 2023.
Preprint in English | bioRxiv | ID: ppzbmed-10.1101.2023.02.26.530067

ABSTRACT

Background: Severe Acute Respiratory Syndrome Coronavirus-2 (SARS CoV-2), is a causative agent of current global pandemic of Coronavirus disease-19 (COVID-19). Due to propagated outbreak and global vaccination drive an immense immunological selection pressure has been exerted on SARS CoV-2 leading to evolution of new variants. This study was performed to compare the mutational and clinical profile of liver disease patients infected with different variants of SARS CoV-2. Methodology: This was a single-centre, retrospective, cohort study in which clinicogenomic analysis of liver disease (LD) patients infected with SARS CoV-2 was performed. Complete demographic and clinical details were retrieved from Hospital Information System (HIS). QC-threshold passed FASTA files containing sequences from COVID-19 patients (n=174) were compared with a reference genome of SARS-CoV-2 isolate named Wuhan-Hu-1 (NCBI Reference Sequence: NC_045512.2) for mutational analysis. Results: Out of 232 finally analysed patients 137 (59.1%) were LD-CoV (+) and 95 (40.9%) were LD-CoV(-). LD patients with comorbidities were affected more with COVID-19 (p=0.002). On comparing the outcome in the terms of mortality, LD-CoV (+) had 2.29 times (OR 2.29, CI 95%, 1.25-4.29) higher of odds of succumbing to COVID-19 (p=0.006). Multivariate regression analysis revealed, abdominal distention (p=0.05), severe COVID-19 pneumonia (p=0.046) and the change in serum bilirubin levels (p=0.005) as well as Alkaline phosphatase (ALP) levels (p=0.003) to have an association with adverse outcome in LD patients with COVID-19. In Delta (22%) and Omicron (48%) groups, Spike gene harboured maximum mutations. On comparing the mutations between LD-CoV(+/D) and LD-CoV(+/O) a total of nine genes had more mutations in LD-CoV(+/O) whereas three genes had more mutations in LD-CoV(+/D). Conclusion: We concluded that LD patients are more susceptible to COVID-19 as compared to a healthy adult with associated adverse clinical outcomes in terms of mortality and morbidity. Therefore this special group should be given priority while devising and introducing new vaccination and vaccination policies. The infection with different variants did not result in different outcome in our group of patients. Keywords: COVID-19, SARS CoV-2, Delta, Omicron, Liver disease


Subject(s)
Coronavirus Infections , Pneumonia , Severe Acute Respiratory Syndrome , Cross Infection , COVID-19 , Liver Diseases
6.
Community Development Journal ; 2022.
Article in English | Web of Science | ID: covidwho-2123073

ABSTRACT

Drawing upon empirical evidence and using Sarah Banks's concept 'ethics work' as a conceptual approach, the article examines the ethical dilemmas facing community development practitioners during the COVID-19 pandemic. The article attempts to understand the everyday experience of community development practitioners working with Dalits, women, and labour migrants in India. Further, given these communities' social and economic vulnerabilities, the article tries to comprehend how practitioners' engagement with these communities during the COVID-19 response exposed them to various ethical dilemmas. The article also traces negotiation and navigation strategies for dealing with ethical dilemmas and delivering services in the community during the COVID-19 pandemic in ways that promote human dignity.

7.
Prestige International Journal of Management & IT- Sanchayan ; 10(2):14-28, 2021.
Article in English | ProQuest Central | ID: covidwho-1980650

ABSTRACT

The importance of information technology in education cannot be overstated because of its huge influence on human lives. Because to the shutdown of higher education institutions, which creates impediments to students' learning, the usage of information techniques has increased during the current COVID-19 epidemic. Additionally, teachers and educators are experimenting with various e-learning platforms in order to give their students with more convenient learning experience possible. Since this is a new trend, teachers and new students alike are getting used to this growth of e learning technique. According to the "Technology Acceptance Model", User satisfaction and perceived ease of use are the two most critical factors of technology adoption (Webb, 2019). Even though icebreaker/introduction discussions and collaborative work using digital communication tools ranked highly in the teaching and learning changes in process, students and instructors alike found that sending regular pronouncements or email alerts and providing feedback on all assignments were the most effective engagement strategies. Because of this, we may conclude that students' well-being and academic performance benefit from student involvement in an e learning environment.

8.
BMJ Open ; 12(4): e055189, 2022 04 06.
Article in English | MEDLINE | ID: covidwho-1962215

ABSTRACT

IMPORTANCE: No proven treatment is available for severely ill COVID-19. Therapeutic use of COVID-19 convalescent plasma (COPLA) is under investigation. OBJECTIVE: To compare the efficacy of COPLA with standard medical therapy (SMT) alone in severe COVID-19 patients. DESIGN, SETTING AND PARTICIPANTS: A multicentric, open-labelled, phase-III randomised controlled trial conducted at two treatment centres with COPLA collected at the third dedicated centre in North-India, the coordinating centre during trial from June 2020 to December 2020. The study population comprised 400 participants in the ratio of 1:1 in each treatment group. INTERVENTION: One group received COPLA with SMT (n=200), and another group received SMT only (n=200). MAIN OUTCOME MEASURES: Primary outcome was time to clinical improvement measured by a two-point reduction in the ordinal scale. Secondary outcomes included duration of O2 therapy, the proportion of patients on mechanical ventilation at day-7, mortality, SARS-CoV-2 antibody levels, cytokine levels and incidence of adverse events. RESULTS: The median time to a two-point reduction in the ordinal scale in both groups was 9 days (IQR=7-13) (p=0.328). The median duration of O2 therapy was 8 days (IQR=6-12) in COPLA and 10 days (IQR=6-12) in SMT group (p=0.64). The PaO2/FiO2 ratio showed significant improvement at 7 days in COPLA group(p=0.036). There was no difference in mortality till 28 days in both groups (p=0.62). However, if COPLA was given within 3 days of hospital admission, a significant reduction in ordinal scale was observed (p=0.04). Neutralising antibody titres in COPLA group (80 (IQR 80-80)) were higher than SMT group (0 (IQR 0-80)) at 48 hours (p=0.001). COPLA therapy led to a significant reduction in TNF-α levels at 48 hours (p=0.048) and D-dimer at 7 days (p=0.02). Mild allergic reactions were observed in 3 (1.5%) patients in COPLA group. CONCLUSION AND RELEVANCE: Convalescent plasma with adequate antibody titres should be transfused in COVID-19 patients along with SMT in the initial 3 days of hospitalisation for better clinical outcomes. TRIAL REGISTRATION NUMBER: NCT04425915.


Subject(s)
COVID-19 , COVID-19/therapy , Humans , Immunization, Passive , Plasma , SARS-CoV-2 , Treatment Outcome , COVID-19 Serotherapy
9.
J Ethnopharmacol ; 296: 115420, 2022 Oct 05.
Article in English | MEDLINE | ID: covidwho-1867358

ABSTRACT

ETHNOPHARMACOLOGICAL RELEVANCE: The coronavirus disease (COVID-19) has relentlessly spread all over the world even after the advent of vaccines. It demands management, treatment, and prevention as well with utmost safety and effectiveness. It is well researched that herbal medicines or natural products have shown promising outcomes to strengthen immunity with antiviral potential against SARS-COV-2. AIM OF THE REVIEW: Our objective is to provide a comprehensive insight into the preventive and therapeutic effects of herbal medicines and products (Ayurvedic) for pre-and post-COVID manifestations. MATERIAL AND METHOD: The database used in the text is collected and compiled from Scopus, PubMed, Nature, Elsevier, Web of Science, bioRxiv, medRxiv, American Chemical Society, and clinicaltrials.gov up to January 2022. Articles from non-academic sources such as websites and news were also retrieved. Exploration of the studies was executed to recognize supplementary publications of research studies and systematic reviews. The keywords, such as "SARS-COV-2, coronavirus, COVID-19, herbal drugs, immunity, herbal immunomodulators, infection, herbal antiviral drugs, and WHO recommendation" were thoroughly searched. Chemical structures were drawn using the software Chemdraw Professional 15.0.0.160 (PerkinElmer Informatics, Inc.). RESULT: A plethora of literature supports that the use of herbal regimens not only strengthen immunity but can also treat SARS-COV-2 infection with minimal side effects. This review summarizes the mechanistic insights into herbal therapy engaging interferons and antibodies to boost the response against SARS-COV-2 infection, several clinical trials, and in silico studies (computational approaches) on selected natural products including, Ashwagandha, Guduchi, Yashtimadhu, Tulsi, etc. as preventive and therapeutic measures against COVID. We have also emphasized the exploitation of herbal medicine-based pharmaceutical products along with perspectives for unseen upcoming alike diseases. CONCLUSION: According to the current state of art and cutting-edge research on herbal medicines have showed a significant promise as modern COVID tools. Since vaccination cannot be purported as a long-term cure for viral infections, herbal/natural medicines can only be considered a viable alternative to current remedies, as conceived from our collected data to unroot recurring viral infections.


Subject(s)
COVID-19 Drug Treatment , Drugs, Chinese Herbal , Plants, Medicinal , Antiviral Agents/pharmacology , Antiviral Agents/therapeutic use , Comprehension , Drugs, Chinese Herbal/therapeutic use , Humans , SARS-CoV-2
10.
Vaccines (Basel) ; 10(1)2021 Dec 31.
Article in English | MEDLINE | ID: covidwho-1580341

ABSTRACT

This study elucidated the clinical, humoral immune response and genomic analysis of vaccine breakthrough (VBT) infections after ChAdOx1 nCoV-19/Covishield vaccine in healthcare workers (HCWs). Amongst 1858 HCWs, 1639 had received either two doses (1346) or a single dose (293) of ChAdOx1 nCoV-19 vaccine. SARS-CoV-2 IgG antibodies and neutralizing antibodies were measured in the vaccinated group and the development of SARS-CoV-2 infection was monitored.Forty-six RT-PCR positive samples from the 203 positive samples were subjected to whole genome sequencing (WGS). Of the 203 (10.92%) infected HCWs, 21.46% (47/219) were non-vaccinated, which was significantly more than 9.52% (156/1639) who were vaccinated and infection was higher in doctors and nurses. Unvaccinated HCWs had 1.57 times higher risk compared to partially vaccinated HCWs and 2.49 times higher risk than those who were fully vaccinated.The partially vaccinated were at higher risk than the fully vaccinated (RR 1.58). Antibody non-response was seen in 3.44% (4/116), low antibody levels in 15.51% (18/116) and medium levels were found in 81.03% (94/116). Fully vaccinated HCWs had a higher antibody response at day 42 than those who were partially vaccinated (8.96 + 4.00 vs. 7.17 + 3.82). Whole genome sequencing of 46 samples revealed that the Delta variant (B.1.617.2) was predominant (69.5%). HCWs who had received two doses of vaccine showed better protection from mild, moderate, or severe infection, with a higher humoral immune response than those who had received a single dose. The genomic analysis revealed the predominance of the Delta variant (B.1.617.2) in the VBT infections.

11.
STAR Protoc ; 3(1): 101051, 2022 03 18.
Article in English | MEDLINE | ID: covidwho-1575581

ABSTRACT

Here we describe a protocol for identifying metabolites in respiratory specimens of patients that are SARS-CoV-2 positive, SARS-CoV-2 negative, or H1N1 positive. This protocol provides step-by-step instructions on sample collection from patients, followed by metabolite extraction. We use ultra-high-pressure liquid chromatography (UHPLC) coupled with high-resolution mass spectrometry (HRMS) for data acquisition and describe the steps for data analysis. The protocol was standardized with specific customization for SARS-CoV-2-containing respiratory specimens. For complete details on the use and execution of this protocol, please refer to Maras et al. (2021).


Subject(s)
COVID-19/diagnosis , Chromatography, High Pressure Liquid/methods , Metabolomics/methods , COVID-19/metabolism , Computational Biology , Diagnostic Tests, Routine , Gene Expression Profiling , Genetic Techniques , Humans , Influenza A Virus, H1N1 Subtype/metabolism , Influenza A Virus, H1N1 Subtype/pathogenicity , Mass Spectrometry/methods , Metabolome , Reference Standards , SARS-CoV-2/metabolism , SARS-CoV-2/pathogenicity , Specimen Handling/methods
12.
Sustainability ; 13(23):13468, 2021.
Article in English | ProQuest Central | ID: covidwho-1559432

ABSTRACT

Satisfaction of local residents is one of the key factors in responsible and sustainable tourism development. It helps tourism planners and policymakers in effective and strategic utilization of tourism resources. The present study investigates local residents’ satisfaction level toward sustainable tourism development through economic, socio-cultural, and environmental development. In order to achieve the goal of the study, one-sample t-test, regression analysis, and Structural Equation Modeling (SEM) were performed. The findings of the study have suggested that local residents have a different level of satisfaction towards overall sustainable development and economic, socio-cultural, and environmental development in the study area. It was also observed that there is a high positive correlation among economic, socio-cultural, and environmental developments, and these developments significantly impact sustainable tourism development.

13.
STAR Protoc ; 3(1): 101045, 2022 03 18.
Article in English | MEDLINE | ID: covidwho-1537118

ABSTRACT

In this protocol, we describe global proteome profiling for the respiratory specimen of COVID-19 patients, patients suspected with COVID-19, and H1N1 patients. In this protocol, details for identifying host, viral, or bacterial proteome (Meta-proteome) are provided. Major steps of the protocol include virus inactivation, protein quantification and digestion, desalting of peptides, high-resolution mass spectrometry (HRMS)-based analysis, and downstream bioinformatics analysis. For complete details on the use and execution of this profile, please refer to Maras et al. (2021).


Subject(s)
COVID-19/diagnosis , Genomics/methods , Proteomics/methods , COVID-19/metabolism , Chromatography, Liquid/methods , Computational Biology , Diagnostic Tests, Routine , Gene Expression Profiling , Genetic Techniques , Genome, Viral/genetics , Humans , Influenza A Virus, H1N1 Subtype/metabolism , Influenza A Virus, H1N1 Subtype/pathogenicity , Peptides , Proteome , SARS-CoV-2/metabolism , SARS-CoV-2/pathogenicity , Specimen Handling/methods , Tandem Mass Spectrometry/methods , Virome/genetics , Virome/physiology
14.
Ann Pediatr Cardiol ; 14(3): 269-277, 2021.
Article in English | MEDLINE | ID: covidwho-1395103

ABSTRACT

BACKGROUND: Outcome data of children with heart disease who acquired COVID-19 infection are limited. AIMS: We sought to analyze outcome data and identify risk factors associated with mortality in children with heart disease and grown-ups with congenital heart disease (GUCH) who had a laboratory-confirmed COVID-19 infection. SETTINGS AND DESIGN: This is a retrospective, multicentric, observational study. MATERIALS AND METHODS: The study included children with heart disease and GUCH population, who presented with either symptomatic or asymptomatic COVID-19 infection to any of the participating centers. COVID-19-negative patients admitted to these centers constituted the control group. RESULTS: From 24 pediatric cardiac centers across India, we included 94 patients with a median age of 12.5 (interquartile range 3-96) months and 49 (52.1%) patients were males. Majority (83 patients, 88.3%) were children. One-third of the patients (n = 31, 33.0%) had acyanotic congenital heart disease, and 41.5% (n = 39) were cyanotic, with > 80% of the patients being unoperated. Only 30 (31.9%) patients were symptomatic for COVID-19 infection, while the rest were incidentally detected positive on screening. A total of 13 patients died (case fatality rate: 13.8%). The in-hospital mortality rate among hospitalized patients was significantly higher among COVID-19-positive cases (13 of 48; 27.1%) as compared to COVID-negative admissions (9.2%) during the study period (P < 0.001). On multivariate analysis, the independent predictors of mortality among COVID-19-positive cases were severity of illness at admission (odds ratio [OR]: 535.7, 95% confidence interval [CI]: 6.9-41,605, P = 0.005) and lower socioeconomic class (OR: 29.5, 95% CI: 1.1-814.7, P = 0.046). CONCLUSIONS: Children with heart disease are at a higher risk of death when they acquire COVID-19 infection. Systematic preventive measures and management strategies are needed for improving the outcomes.

15.
Ann Pediatr Cardiol ; 14(3): 260-268, 2021.
Article in English | MEDLINE | ID: covidwho-1395102

ABSTRACT

BACKGROUND: COVID-19 pandemic has disrupted pediatric cardiac services across the globe. Limited data are available on the impact of COVID.19 on pediatric cardiac care in India. AIMS: The aims are to study the impact of COVID-19 pandemic on the care of children with heart disease in India in terms of number of outpatient visits, hospitalizations, catheter-based interventions, and cardiac surgeries. SETTINGS AND DESIGN: This is a retrospective, multicentric, observational study. METHODS: We collected monthly data on the number and characteristics of outpatient visits, hospitalizations, catheter-based interventions, and cardiac surgeries and major hospital statistics, over a period of 5 months (April to August 2020), which coincided with the first wave of COVID-19 pandemic in India and compared it with data from the corresponding months in 2019. RESULTS: The outpatient visits across the 24 participating pediatric cardiac centers decreased by 74.5% in 2020 (n = 13,878) as compared to the corresponding period in 2019 (n = 54,213). The reduction in the number of hospitalizations, cardiac surgeries, and catheterization procedures was 66.8%, 73.0%, and 74.3%, respectively. The reduction in hospitalization was relatively less pronounced among neonates as compared to infants/children (47.6% vs. 70.1% reduction) and for emergency surgeries as compared to elective indications (27.8% vs. 79.2%). The overall in-hospital mortality was higher in 2020 (8.1%) as compared to 2019 (4.8%), with a higher postoperative mortality (9.1% vs. 4.3%). CONCLUSIONS: The current COVID-19 pandemic significantly impacted the delivery of pediatric cardiac care across India with two-third reduction in hospitalizations and cardiac surgeries. In an already resource-constrained environment, the impact of such a massive reduction in the number of surgeries could be significant over the coming years. These findings may prove useful in formulating strategy to manage subsequent waves of ongoing COVID-19 pandemic.

16.
Sci Rep ; 11(1): 15429, 2021 07 29.
Article in English | MEDLINE | ID: covidwho-1333985

ABSTRACT

Evidences are escalating on the diverse neurological-disorders and asymptomatic cardiovascular-diseases associated with COVID-19 pandemic due to the Sanal-flow-choking. Herein, we established the proof of the concept of nanoscale Sanal-flow-choking in real-world fluid-flow systems using a closed-form-analytical-model. This mathematical-model is capable of predicting exactly the 3D-boundary-layer-blockage factor of nanoscale diabatic-fluid-flow systems (flow involves the transfer of heat) at the Sanal-flow-choking condition. As the pressure of the diabatic nanofluid and/or non-continuum-flows rises, average-mean-free-path diminishes and thus, the Knudsen-number lowers heading to a zero-slip wall-boundary condition with the compressible-viscous-flow regime in the nanoscale-tubes leading to Sanal-flow-choking due to the sonic-fluid-throat effect. At the Sanal-flow-choking condition the total-to-static pressure ratio (ie., systolic-to-diastolic pressure ratio) is a unique function of the heat-capacity-ratio of the real-world flows. The innovation of the nanoscale Sanal-flow-choking model is established herein through the entropy relation, as it satisfies all the conservation-laws of nature. The physical insight of the boundary-layer-blockage persuaded nanoscale Sanal-flow-choking in diabatic flows presented in this article sheds light on finding solutions to numerous unresolved scientific problems in physical, chemical and biological sciences carried forward over the centuries because the mathematical-model describing the phenomenon of Sanal-flow-choking is a unique scientific-language of the real-world-fluid flows. The 3D-boundary-layer-blockage factors presented herein for various gases are universal-benchmark-data for performing high-fidelity in silico, in vitro and in vivo experiments in nanotubes.


Subject(s)
Fluid Shifts/physiology , Models, Theoretical , Nanotubes/chemistry , Rheology/methods , Algorithms , Biophysical Phenomena , COVID-19/physiopathology , Cardiovascular Physiological Phenomena , Cardiovascular System/physiopathology , Computational Biology/methods , Humans , Hydrodynamics , Physical Phenomena , SARS-CoV-2/isolation & purification
17.
biorxiv; 2021.
Preprint in English | bioRxiv | ID: ppzbmed-10.1101.2021.07.21.453274

ABSTRACT

SARS-CoV-2 has an exonuclease-based proofreader, which removes nucleotide inhibitors such as Remdesivir that are incorporated into the viral RNA during replication, reducing the efficacy of these drugs for treating COVID-19. Combinations of inhibitors of both the viral RNA-dependent RNA polymerase and the exonuclease could overcome this deficiency. Here we report the identification of hepatitis C virus NS5A inhibitors Pibrentasvir and Ombitasvir as SARS-CoV-2 exonuclease inhibitors. In the presence of Pibrentasvir, RNAs terminated with the active forms of the prodrugs Sofosbuvir, Remdesivir, Favipiravir, Molnupiravir and AT-527 were largely protected from excision by the exonuclease, while in the absence of Pibrentasvir, there was rapid excision. Due to its unique structure, Tenofovir-terminated RNA was highly resistant to exonuclease excision even in the absence of Pibrentasvir. Viral cell culture studies also demonstrate significant synergy using this combination strategy. This study supports the use of combination drugs that inhibit both the SARS-CoV-2 polymerase and exonuclease for effective COVID-19 treatment.


Subject(s)
COVID-19 , Hepatitis C
18.
medrxiv; 2021.
Preprint in English | medRxiv | ID: ppzbmed-10.1101.2021.06.28.21259546

ABSTRACT

Background: India saw a massive surge and emergence of SARS CoV2 variants. We elucidated clinical and humoral immune response and genomic analysis of vaccine breakthrough (VBT) infections after ChAdOx1 nCoV-19 vaccine in healthcare workers (HCWs). Methods: The study was conducted on 1858 HCWs receiving two doses of ChAdOx1 nCoV- 19 vaccine. Serial blood samples were collected to measure SARS CoV2 IgG and neutralizing antibodies. 46 RT-PCR positive samples from VBT infections were subjected to whole genome sequencing (WGS). Results: Infection was confirmed in 219 (11.79%) HCWs of which 21.46% (47/219) were non-vaccinated, significantly more (p <0.001) than 9.52% (156/1639) vaccinated group. VBT infections were significantly higher in doctors and nurses compared to other hospital staff (p <0.001). Unvaccinated individuals had 1.57 times higher risk of infection compared to partially vaccinated (p 0.02) and 2.49 times than fully vaccinated (<0.001). Partially vaccinated were at higher risk of infection than fully vaccinated (RR 1.58,p 0.01). There were 3 (1.36%) severe cases and 1 death in unvaccinated group compared to none in the vaccinated. Non-response after 14 days of second dose was seen in 6.5% (3/46) and low antibody levels (1-4.62 S/CO) in 8.69% (4/46). Delta variant (B.1.617.2) was dominant (69.5%) and reinfection was documented in 4 (0.06%) HCWs. Conclusions: Nearly one in ten vaccinated HCWs can get infected, more so with only single dose (13.65%) than two doses (8.62%). Fully vaccinated are better protected with higher humoral immune response. Genomic analysis revealed an alarming rise of Delta variant (B.1.617.2) in VBT infections.


Subject(s)
Breakthrough Pain , Genomic Instability , Death
19.
Journal of Enterprising Communities ; 15(1):137-154, 2021.
Article in English | ProQuest Central | ID: covidwho-1236306

ABSTRACT

PurposeThe role of information and communications technology (ICT) has been tested in various contexts of online shopping and the results show that ICT has successfully transformed the way of doing business. This study aims to propose that if women have adequate internet skills, namely, operative, informational and creative skills, their entrepreneurial intentions will be high.Design/methodology/approachThis is descriptive research. The data was collected from 246 university students and analyzed using PLS-SEM.FindingsThe results of the study show that students belonging to entrepreneurial backgrounds have a positive attitude toward entrepreneurship. The impact of internet skills was mixed on the relationship of entrepreneurial attitude and entrepreneurial intention.Research limitations/implicationsThe sample was not generalized as the sample consisted of urban and internet-using women. Future research can test the model for rural women entrepreneurs or usage of m-commerce for the same.Practical implicationsThe results of the study show that women having the skills to operate the internet have higher intentions to become an entrepreneur. Thus, the e-commerce web-space can use the results to influence women of the new generation to use available tools in their journey of entrepreneurship.Social implicationsWomen are an indispensable part of society. Empowering them will not only improve their confidence but will also strengthen the pillars of society.Originality/valueExtensive research work has been done in the context of women entrepreneurship. The study is a novel attempt to test the effects of internet skills on entrepreneurial intention among new generation women. The results will be very much useful for future research and will extend the body of academic literature.

20.
medrxiv; 2021.
Preprint in English | medRxiv | ID: ppzbmed-10.1101.2021.05.16.21257280

ABSTRACT

ObjectiveWe aimed to determine the prevalence of the severity of COVID-19 illness and its associated predisposing factors in Nepal. DesignCross-sectional, observational study SettingSingle-centered hospital-based study, conducted at Nepal armed police force (APF) hospital, Kathmandu, Nepal. ParticipantsAll individuals aged [≥]18 years with laboratory-confirmed SARS-Cov-2 (the SARS-CoV-2 specific real-time-RT-PCR result positive), regardless the severity of their disease. MeasurementsDisease severity was evaluated as a primary outcome and age, sex, BMI, smoking history, alcohol history, Hypertension, diabetes mellitus were evaluated as predictors in the analysis. ResultsMean ages of the patients were 40.79{+/-}16.04 years, and about two-thirds of the patients were male 146 (73.7%). More than half 57.1% (95%CI: 52.42-61.51) of the population had a mild infection, whereas 16.7% (95%CI: 7.4-24.6%) had severe/critical illness. In univariate analysis, each 1-year increase in age (OR: 1.05; 95% CI:1.030-1.081; P<0.001), each 1 unit increase in BMI (OR:1.12; 95% CI:1.02-1.25; P=0.033), comorbid illness (OR: 5.79; 95%CI: 2.51-13.33; P<0.001), hypertension (OR:5.95; 95%CI:2.66-13.30: P<0.001), diabetes mellitus (OR:3.26; 95%CI:1.30-8.15: P<0.005), and fever (OR:34.64; 95% CI:7.98-150.38; P<0.001) were independently associated with severity of the disease, whereas age (OR: 1.049; 95% CI: 1.019-1.080; P=0.02), hypertension (OR: 4.77; 95%CI: 1.62-14.04; P=0.004), and fever (OR: 51.02; 95%CI: 9.56-272.51; P<0.001) remained a significant predictive factors in multivariate analysis. ConclusionThe majority of the patients with COVID-19 had a mild illness, with 16.7% severe illness. Age, BMI, hypertension, diabetes mellitus, comorbidity, and temperature were associated the severity of the illness. Age, hypertension, and fever emerged as an independent predictive factors in multivariate analysis, and thus, these vulnerable groups should be given special protection to the infection and proactive intervention should be initiated at an early stage of the infection to diminish the severity of the illness and improve the clinical outcome of the disease. Strengths and limitations of the studyO_LIMuch of the studies on COVID-19 in Nepal focus on the describing epidemiology and clinical profile of the disease, however, risk factors that contribute to the severity of the illness are overlooked. C_LIO_LIThis study may help estimate the burden of the disease and identify the vulnerable group with poor prognosis, which is vital for clinicians and the public health approach to deal with the disease. C_LIO_LIAlthough limiting the study to a single-center with a relatively small sample size, it, however, allows evaluation of the importance of the demographic and geographical variation. C_LIO_LISocio-economic factors, lifestyle, and availability of quality medical care may have contributed to the severity of the COVID-19, which needs to be addressed in a further large-scale study. C_LI


Subject(s)
COVID-19
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