Evaluation of Rapid Antigen Test as a Marker of SARS-CoV-2 Infectivity.

Background Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that emerged in late 2019 continues to spread globally. Reverse transcriptase polymerase chain reaction (RT-PCR), which is considered the gold standard for diagnosis, does not always indicate contagiousness. This study was planned to evaluate the performance of the rapid antigen test (RAT) with the duration of symptoms and the usefulness of these tests in determining the infectivity of patients by performing sub-genomic RT-PCR. Methodology This prospective, observational study was designed to compare the diagnostic value of the COVID-19 RAT (SD Biosensor, Korea) with COVID-19 RT-PCR (Thermo Fisher, USA) by serial testing of patients. To evaluate the infectivity of the virus, sub-genomic RT-PCR was performed on previous RAT and RT-PCR-positive samples. Results Of 200 patients, 102 were positive on both RT-PCR and RAT, with 87 patients serially followed and tested. The sensitivity and specificity of RAT were 92.73% and 93.33%, respectively, in symptomatic patients. The mean duration of RAT positivity was 9.1 days, and the mean duration of RT-PCR positivity was 12.6 days. Sub-genomic RT-PCR test was performed on samples that were reported to be positive by RAT, and 73/87 (83.9%) patients were found to be positive. RAT was positive in symptomatic patients whose duration of illness was less than 10 days or those with a cycle threshold value below 32. Conclusions Thus, RAT can be used as the marker of infectivity of SARS-CoV-2 in symptomatic patients, especially in healthcare workers.

Organic Mart: E Commerce Web Site for Agriculture

The corona virus pandemic has made severe changes to our lifestyle, thereby, indirectly affecting our physical and psychological well-being.: how we work, socialize. With the global pandemic still in the process of altering the definition of "normal life” across the planet, most industries are still scrambling to cope up. Electronic-commerce (e-commerce) is the buying and selling of services and products, or the transmitting of data or funds, over a network, primarily the web. Business to business (B2B), business to consumer (B2C), consumer to consumer or consumer-to-business are the different types of business transactions. The terms e commerce and e business are often interchangeable. The term e tail is used in addition to the reference in transaction processes for online shopping. E-Commerce platform with modern technologies which is MERN (MongoDB, Express, React, and Node.js) Stack. Agriculture specific functionality which incorporates selling agriculture related products. By this platform farmers will get exposure and farmers will receive their profits directly through the web site. E-Commerce platform includes PAN India support (including rural). Farmers will get a precise idea of what they are buying with the help of description provided by the admin. Ideal agro e commerce can make a remarkable benefit to "developing” countries. Make transactions risk-free and help track resource expenditure. Work as a powerful catalyst for economic development. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Epidemiology, Clinical Profile, Intensive Care Needs and Outcome in Children with SARS-CoV-2 Infection Admitted to a Tertiary Hospital During the First and Second Waves of the COVID-19 Pandemic in India.

OBJECTIVES: To compare the epidemiological, clinical profile, intensive care needs and outcome of children hospitalized with SARS-CoV-2 infection during the first and second waves of the pandemic. METHODS: This was a retrospective study of all children between 1 mo and 14 y, admitted to a dedicated COVID-19 hospital (DCH) during the first (1st June to 31st December 2020) and second waves (1st March to 30th June 2021). RESULTS: Of 217 children, 104 (48%) and 113 (52%) were admitted during the first and second waves respectively. One hundred fifty-two (70%) had incidentally detected SARS-CoV-2 infection, while 65 (30%) had symptomatic COVID-19. Comorbidities were noted in 137 (63%) children. Fifty-nine (27%) and 66 (30%) children required high-dependency unit (HDU) and ICU care respectively. Severity of infection and ICU needs were similar during both waves. High-flow oxygen (n = 5, 2%), noninvasive ventilation [CPAP (n = 34, 16%) and BiPAP (n = 8, 5%)] and invasive ventilation (n = 45, 21%) were respiratory support therapies needed. NIV use was more during the second wave (26% vs. 13%; p = 0.02). The median (IQR) length (days) of DCH stay among survivors was longer during the first wave [8 (6-10) vs. 5.5 (3-8); p = 0.0001]. CONCLUSIONS: Disease severity, associated comorbidities, PICU and organ support need and mortality were similar in the first and second waves of the pandemic. Children admitted during the second wave were younger, had higher proportion of NIV use and shorter length of COVID-19 hospital stay.

Assessing a chip based rapid RTPCR test for SARS CoV-2 detection (TrueNat assay): A diagnostic accuracy study.

COVID-19 testing is required before admission of a patient in the hospitals, invasive procedures, major and minor surgeries etc. Real Time Polymerase chain reaction is the gold standard test for the diagnosis, but requires well equipped biosafety laboratory along with trained manpower. In this study we have evaluated the diagnostic accuracy of novel TrueNat molecular assay for detecting SARS CoV-2. TrueNat is a chip-based real time PCR test and works on portable, light weight, battery powered equipment and can be used in remote areas with poor infrastructure. In this study 1807 patients samples were collected for both TrueNat and RTPCR COVID-19 testing during study period. Of these 174 (9.7%) and 174 (15%) were positive by RTPCR and TrueNat respectively and taking results of RTPCR as gold standard TrueNat test showed a sensitivity, specificity and diagnostic accuracy of 69.5, 90.9% and 89.2% respectively. It can be concluded that TrueNat is a simple, easy to use, good rapid molecular diagnostic test for diagnosis of COVID-19 especially in resource limited settings and will prove to be a game changer of molecular diagnostics in future.

Evaluation of seven commercial RT-PCR kits for COVID-19 testing in pooled clinical specimens.

There are more than 350 real-time polymerase chain reaction (RT-PCR) coronavirus disease-2019 (COVID-19) testing kits commercially available but these kits have not been evaluated for pooled sample testing. Thus, this study was planned to compare and evaluate seven commercially available kits for pooled samples testing. Diagnostic accuracy of (1) TRUPCR SARS-CoV-2 Kit (Black Bio), (2) TaqPath RT-PCR COVID-19 Kit (Thermo Fisher Scientific), (3) Allplex 2019-nCOV Assay (Seegene), (4) Patho detect COVID-19 PCR kit (My Lab), (5) LabGun COVID-19 RT-PCR Kit (Lab Genomics, Korea), (6) Fosun COVID-19 RT-PCR detection kit (Fosun Ltd.), (7) Real-time Fluorescent RT-PCR kit for SARS CoV-2 (BGI) was evaluated on precharacterised 40 positive and 10 negative COVID-19 sample pools. All seven kits detected all sample pools with low Ct values (<30); while testing weak positive pooled samples with high Ct value (>30); the TRUPCR Kit, TaqPath Kit, Allplex Assay, and BGI RT-PCR kit showed 100% sensitivity, specificity, and accuracy. However, the Fosun kit, LabGun Kit, and Patho detect kit could detect only 90%, 85%, and 75% of weakly positive samples, respectively. We conclude that all seven commercially available RT-PCR kits included in this study can be used for routine molecular diagnosis of COVID-19. However, regarding performing pooled sample testing, it might be advisable to use those kits that performed best regarding positive identification in samples' pool, that is TRUPCR SARS-CoV-2 Kit, TaqPath RT-PCR COVID-19 Kit, Allplex 2019-nCOV Assay, and BGI Real-time RT-PCR kit for detecting SARS CoV-2.

Bharathi-an applied semantic intelligence use case for public data in india

Data sets published for public consumption related to governance typically contain common metadata. This metadata normally describes the publishing organisation, the domain, the administrative region and a topic that the data best describes. A relevant semantic vocabulary will not only facilitate linking the metadata through meaningful contexts but also enable grounding related information from diverse public data sets using semantic entities defining the metadata. In this paper, we present Bharathi -Linked Data Vocabulary for the Indian context. Bharathi contains information regarding government organisations at the union & state government level, administrative regions, sectors, sub sectors and common topics used frequently in the vocabulary of the government functions. Further, Bharathi contains links to other open vocabularies such as GeoNames for geographical locations. The schema of Bharathi uses existing established ontologies making it inter-operable and extensible. We describe Bharathi along with a live use case of its application in accomplishing a semantic Covid19 data analysis for India. © 2021 CEUR-WS. All rights reserved.

Management of STEMI during the COVID-19 pandemic: Lessons learned in 2020 to prepare for 2021.

As the prevalence of asymptomatic COVID-19 continues to increase, there is an increasing possibility that patients with COVID-19 may presen with ST-segment elevation myocardial infarction (STEMI). With social distancing and restricted access to preventive healthcare and emergency services, the management of acute cardiac emergencies such as myocardial infarction has suffered collateral damage. Thus far, global trends suggest a decrease in STEMI activations with possible worse outcomes due to delayed presentation and management. In this review, we discuss the challenges to STEMI management in the COVID-19 era and provide potential solutions for adherence to evidence-based therapies as the pandemic progresses into the year 2021.