Risk factors for acute kidney injury in patients hospitalized with COVID-19 / Fatores de risco para lesão renal aguda em pacientes hospitalizados com COVID-19

Abstract Introduction: Acute kidney injury (AKI) occurs frequently in COVID-19 patients and is associated with greater morbidity and mortality. Knowing the risks of AKI allows for identification, prevention, and timely treatment. This study aimed to identify the risk factors associated with AKI in hospitalized patients. Methods: A descriptive, retrospective, cross-sectional, and analytical component study of adult patients hospitalized with COVID-19 from March 1 to December 31, 2020 was carried out. AKI was defined by the creatinine criteria of the KDIGO-AKI guidelines. Information, regarding risk factors, was obtained from electronic medical records. Results: Out of the 934 patients, 42.93% developed AKI, 60.59% KDIGO-1, and 9.9% required renal replacement therapy. Patients with AKI had longer hospital stay, higher mortality, and required more intensive care unit (ICU) admission, mechanical ventilation, and vasopressor support. Multivariate analysis showed that age (OR 1.03; 95% CI 1.02-1.04), male sex (OR 2.13; 95% CI 1.49-3.04), diabetes mellitus (DM) (OR 1.55; 95% CI 1.04-2.32), chronic kidney disease (CKD) (OR 2.07; 95% CI 1.06-4.04), C-reactive protein (CRP) (OR 1.02; 95% CI 1.00-1.03), ICU admission (OR 1.81; 95% CI 1.04-3.16), and vasopressor support (OR 7.46; 95% CI 3.34-16.64) were risk factors for AKI, and that bicarbonate (OR 0.89; 95% CI 0.84-0.94) and partial pressure arterial oxygen/inspired oxygen fraction index (OR 0.99; 95% CI 0.98-0.99) could be protective factors. Conclusions: A high frequency of AKI was documented in COVID-19 patients, with several predictors: age, male sex, DM, CKD, CRP, ICU admission, and vasopressor support. AKI occurred more frequently in patients with higher disease severity and was associated with higher mortality and worse outcomes.

RESUMO Introdução: Lesão renal aguda (LRA) ocorre frequentemente em pacientes com COVID-19 e associa-se a maior morbidade e mortalidade. Conhecer riscos da LRA permite a identificação, prevenção e tratamento oportuno. Este estudo teve como objetivo identificar fatores de risco associados à LRA em pacientes hospitalizados. Métodos: Realizou-se estudo descritivo, retrospectivo, transversal e de componente analítico de pacientes adultos hospitalizados com COVID-19 de 1º de março a 31 de dezembro, 2020. Definiu-se a LRA pelos critérios de creatinina das diretrizes KDIGO-LRA. Informações sobre fatores de risco foram obtidas de prontuários eletrônicos. Resultados: Dos 934 pacientes, 42,93% desenvolveram LRA, 60,59% KDIGO-1 e 9,9% necessitaram de terapia renal substitutiva. Pacientes com LRA apresentaram maior tempo de internação, maior mortalidade e necessitaram de mais internações em UTIs, ventilação mecânica e suporte vasopressor. A análise multivariada mostrou que idade (OR 1,03; IC 95% 1,02-1,04), sexo masculino (OR 2,13; IC 95% 1,49-3,04), diabetes mellitus (DM) (OR 1,55; IC 95% 1,04-2,32), doença renal crônica (DRC) (OR 2,07; IC 95% 1,06-4,04), proteína C reativa (PCR) (OR 1,02; IC 95% 1,00-1,03), admissão em UTI (OR 1,81; IC 95% 1,04-3,16) e suporte vasopressor (OR 7,46; IC 95% 3,34-16,64) foram fatores de risco para LRA, e que bicarbonato (OR 0,89; IC 95% 0,84-0,94) e índice de pressão parcial de oxigênio arterial/fração inspirada de oxigênio (OR 0,99; IC 95% 0,98-0,99) poderiam ser fatores de proteção. Conclusões: Documentou-se alta frequência de LRA em pacientes com COVID-19, com diversos preditores: idade, sexo masculino, DM, DRC, PCR, admissão em UTI e suporte vasopressor. LRA ocorreu mais frequentemente em pacientes com maior gravidade da doença e associou-se a maior mortalidade e piores desfechos.

China's policies: post-COVID-19 challenges for the older population.

On 7 December 2022, the State Council of China released 'Measures to Further Optimize the Implementation of the Prevention and Control of the New Coronavirus Epidemic'. The previous three-year dynamic zero epidemic prevention policy was then replaced with a full liberalization policy. On 5 May 2023, the World Health Organization declared that COVID-19 no longer constituted a 'public health emergency of international concern.' However, given the ongoing prevalence of coronavirus, emerging mutations, and the liberalization of restrictions, there are increased risks of vulnerable people contracting new variants. Low vaccination coverage among older people with compromised immune systems, puts them at further risk. The policy shift will increase pressure on already stretched health infrastructure and medical resources. This short article adds to the current debate arguing that the Chinese government should take commensurate preventive measures, including strengthening medical facilities and equipment and targeting ongoing vaccination in older people.

Paper ContextThe COVID-19 pandemic has disproportionately affected older people.This short paper discusses the consequences of China's liberalization policy on the older population.It suggests that the Chinese government should have taken targeted measures to mitigate health risks occurring under the changed circumstances.

The digital transformation in pharmacy: embracing online platforms and the cosmeceutical paradigm shift.

In the face of rapid technological advancement, the pharmacy sector is undergoing a significant digital transformation. This review explores the transformative impact of digitalization in the global pharmacy sector. We illustrated how advancements in technologies like artificial intelligence, blockchain, and online platforms are reshaping pharmacy services and education. The paper provides a comprehensive overview of the growth of online pharmacy platforms and the pivotal role of telepharmacy and telehealth during the COVID-19 pandemic. Additionally, it discusses the burgeoning cosmeceutical market within online pharmacies, the regulatory challenges faced globally, and the private sector's influence on healthcare technology. Conclusively, the paper highlights future trends and technological innovations, underscoring the dynamic evolution of the pharmacy landscape in response to digital transformation.

Synergistic peptide combinations designed to suppress SARS-CoV-2.

The SARS-CoV-2, responsible for the COVID-19 pandemic, poses a significant threat to global healthcare. Peptide and peptide-based inhibitors, known for their safety, efficacy, and selectivity, have recently emerged as promising candidates for treating late-developing viral infections. In this study, three peptides were selected to target different stages of viral invasion, specifically ACE2 and S protein binding, as well as membrane fusion. The objective was to assess their ability to impede the entry of the SARS-CoV-2 Spike pseudotyped virus. Our findings revealed that a combination of these three peptides demonstrated enhanced antiviral effects. This outcome substantiates the feasibility of developing effective peptide combinations to combat diseases related to SARS-CoV-2. Moreover, the three-peptide combinations, designed to target multiple aspects of SARS-CoV-2 viral entry, exhibited heightened viral inhibition and broad-spectrum antiviral properties.

Patient-Perceived Quality Assessment in Orthopedics and Traumatology Departments during COVID-19 Pandemic.

The COVID-19 pandemic has led to significant disruptions in various healthcare systems. In Romania, the elective procedures in the orthopedic and traumatology specialty were one of the most affected. The study aims to investigate the influence of the COVID-19 pandemic on patient perceptions of quality in these departments. Standardized assessment tools were used, which consist of satisfaction questionnaires addressed to patients in order to assess the quality of health services in orthopedics and traumatology departments. Thus, a retrospective study was conducted using satisfaction questionnaires addressed to patients admitted to the orthopedics and traumatology departments of the County Clinical Emergency Hospital Bihor between January 2019 and December 2022. Eight reports, based on 746 questionnaires conducted during the studied period, were evaluated. To gauge patient satisfaction, Likert scales featuring five response options were used. A total of 627 questionnaires were valid, the exclusion criteria being incomplete questionnaires (the patients did not respond on all questions, n = 119). Four domains were analyzed: demographic data, hotel conditions, quality of medical care, and overall satisfaction. Demographic data highlight that patients exhibited an equitable distribution across residences, with 50.2% hailing from urban locales, while 53.5% (n = 333) were female. Regarding the overall impression, in 2020, there was a decline in the top rating of 5 compared to 2019, dropping to just 45.10% from 53.45%. Scores of 4 increased to 41.83%, while scores of 3 stayed under 8.5%. Scores of 2 and 1 were negligible. In 2021 and 2022, we can observe a sustained increase in the number of patients who awarded 5 points for overall impression and a decrease in the number of patients who awarded 4 points compared to previous years. The maximum difference between 2020 and 2021 and the period before and after this period was 27.24% (p-value < 0.001). The results indicate that while overall impressions of the hospital remained positive throughout the studied period, there were notable fluctuations in satisfaction levels during the pandemic. Patient satisfaction with attending physicians dipped in 2020 from 86.70% to 77.78% but recovered by 2022. The same trend can be observed with nurses and caregivers, as well as hotel services, during this period. These findings underscore the importance of addressing patient concerns and improving the quality of care delivery, particularly during times of crisis.

PARP14 is pro- and anti-viral host factor that promotes IFN production and affects the replication of multiple viruses.

PARP14 is a 203 kDa multi-domain protein that is primarily known as an ADP-ribosyltransferase, and is involved in a variety of cellular functions including DNA damage, microglial activation, inflammation, and cancer progression. In addition, PARP14 is upregulated by interferon (IFN), indicating a role in the antiviral response. Furthermore, PARP14 has evolved under positive selection, again indicating that it is involved in host-pathogen conflict. We found that PARP14 is required for increased IFN-I production in response to coronavirus infection lacking ADP-ribosylhydrolase (ARH) activity and poly(I:C), however, whether it has direct antiviral function remains unclear. Here we demonstrate that the catalytic activity of PARP14 enhances IFN-I and IFN-III responses and restricts ARH-deficient murine hepatitis virus (MHV) and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) replication. To determine if PARP14's antiviral functions extended beyond CoVs, we tested the ability of herpes simplex virus 1 (HSV-1) and several negative-sense RNA viruses, including vesicular stomatitis virus (VSV), Ebola virus (EBOV), and Nipah virus (NiV), to infect A549 PARP14 knockout (KO) cells. HSV-1 had increased replication in PARP14 KO cells, indicating that PARP14 restricts HSV-1 replication. In contrast, PARP14 was critical for the efficient infection of VSV, EBOV, and NiV, with EBOV infectivity at less than 1% of WT cells. A PARP14 active site inhibitor had no impact on HSV-1 or EBOV infection, indicating that its effect on these viruses was independent of its catalytic activity. These data demonstrate that PARP14 promotes IFN production and has both pro- and anti-viral functions targeting multiple viruses.

Widespread Horizontal Gene Transfer Among Animal Viruses.

The initial objective of this study was to shed light on the evolution of small DNA tumor viruses by analyzing de novo assemblies of publicly available deep sequencing datasets. The survey generated a searchable database of contig snapshots representing more than 100,000 Sequence Read Archive records. Using modern structure-aware search tools, we iteratively broadened the search to include an increasingly wide range of other virus families. The analysis revealed a surprisingly diverse range of chimeras involving different virus groups. In some instances, genes resembling known DNA-replication modules or known virion protein operons were paired with unrecognizable sequences that structural predictions suggest may represent previously unknown replicases and novel virion architectures. Discrete clades of an emerging group called adintoviruses were discovered in datasets representing humans and other primates. As a proof of concept, we show that the contig database is also useful for discovering RNA viruses and candidate archaeal phages. The ancillary searches revealed additional examples of chimerization between different virus groups. The observations support a gene-centric taxonomic framework that should be useful for future virus-hunting efforts.

Evaluation of IFNAR2 and TYK2 transcripts' prognostic role in COVID-19 patients: a retrospective study.

Background and objectives: This study aimed to investigate the possible prognostic significance of interferon alpha-beta receptor subunit 2 (IFNAR2) and tyrosine kinase 2 (TYK2) expressions. Methods: We conducted a retrospective study including COVID-19 adult patients. All blood samples were collected before any interventions. The expressions of IFNAR2 and TYK2 were assessed using real-time PCR in venous blood samples of 54 cases and 56 controls. The transcript quantities of IFNAR2 and TYK2 genes were assessed using a Delta-Ct method. Results: Our findings show no significant differences in gene expression levels for IFNAR2 and TYK2 between patients who required oxygen (O2) therapy and those who did not (p-value = 0.732 and p-value = 0.629, respectively). Likewise, there were no significant differences in IFNAR2 and TYK2 expressions between patients hospitalized for less than 7 days and those hospitalized for 7 days or more (p-value = 0.455 and p-value = 0.626, respectively). We also observed a weak correlation between IFNAR2 expression and CRP (p-value = 0.045, r = 0.192). There was a negative correlation between the expression levels of IFNAR2 and TYK2 transcripts in COVID-19 patients (p-value = 0.044; partial correlation coefficient = -0.283). Additionally, IFNAR2 and TYK2 were significantly downregulated in the COVID-19 group compared to healthy subjects (p-value = 0.002 and p-value = 0.028, respectively). However, neither IFNAR2 nor TYK2 expression was significantly different between the case subgroups based on COVID-19 severity. The IFNAR2 ΔΔCt (B = -0.184, 95% CI: -0.524-0.157, p-value = 0.275) and the TYK2 ΔΔCt (B = 0.114, 95% CI: -0.268-0.496, p-value = 0.543) were not found to be significant predictors of hospitalization duration. The area under the curve (AUC) for IFNAR2 expression is 0.655 (p-value = 0.005, 95% CI: 0.554-0.757), suggesting its poor discriminative value. Conclusion: We were unable to comment definitively on the prognostic power of IFNAR2 and TYK2 expressions in COVID-19 patients, and larger-scale studies are needed. The principal limitations of this study included the lack of longitudinal analysis and limited sample size.

Prevalence, Epidemiological, and Clinical Profile of Patients Coinfected with Human Immunodeficiency Virus and Tuberculosis in the Coronavirus Disease 2019 Context in Health Facilities in the East Region, Cameroon.

Background and Objective: Suspected cases of tuberculosis (TB) are identified for confirmation by bacteriological tests through clinical screening for TB in people living with human immunodeficiency virus (HIV) during routine visits or when antiretrovirals (ARVs) are dispensed. Our aim is to determine the prevalence and describe the epidemiological and clinical characteristics of HIV-TB coinfected patients in the coronavirus disease 2019 (COVID-19) setting in health facilities in the East Region of Cameroon. This study addresses knowledge gaps on HIV-TB coinfection during COVID-19, aiming to provide insights into the interaction and impact of HIV, TB, and COVID-19 on individuals' health. Methods: This was an observational study. It involved two retrospective cohorts of HIV-TB coinfected patients before and after the COVID-19 pandemic. We conducted manual reviews of the medical records and antiretroviral therapy (ART) and TB registers of 262 patients. These patients were coinfected with HIV and TB during the period from April 2019 to April 2021 in 11 health facilities in the East Cameroon health region. The sociodemographic and clinical characteristics of the cases were extracted from the consultation registers and entered into the KoBo Collect application, then analyzed using the Statistical Package for the Social Sciences (SPSS) software, version 25. Results: In this study of 262 HIV-TB coinfection cases, 60.3% occurred before COVID-19, and 39.7% during the pandemic. HIV-TB coinfection prevalence among HIV patients was 1%. Patients averaged 39.3 years in age, with a significant shift in sex ratios from 0.65 to 1.33 between pre-COVID-19 and COVID-19 cohorts. Education varied, with 45.8% having secondary education, 44.8% with primary, 2.4% having higher education, and 7.1% having none. Most (78.9%) had professional occupations, and 53.7% lived in rural areas. The majority were newly diagnosed (96.3% before COVID-19; 93.3% during COVID-19), with 3.7% relapses and 4.2% discontinuing treatment. Most had pulmonary TB (84.9%) and were aware of treatment duration (94.6%). About 65.4% experienced treatment-related adverse events. Regarding family support, 69.3% received help with medication. However, the concern was 80.6% did not adhere to anti-COVID-19 measures. Conclusion and Global Health Implications: Gender was significantly associated with compliance. Most patients were on treatment, but a small percentage had discontinued it. Patients need to be made aware of the importance of complying with anti-COVID-19 barrier measures to prevent a potential worsening of the health situation. Moreover, clinical and biological monitoring needs to be stepped up throughout the course of anti-TB treatment.

Rain, rain, go away, come again another day: do climate variations enhance the spread of COVID-19?

The spread of infectious diseases was further promoted due to busy cities, increased travel, and climate change, which led to outbreaks, epidemics, and even pandemics. The world experienced the severity of the 125 nm virus called the coronavirus disease 2019 (COVID-19), a pandemic declared by the World Health Organization (WHO) in 2019. Many investigations revealed a strong correlation between humidity and temperature relative to the kinetics of the virus's spread into the hosts. This study aimed to solve the riddle of the correlation between environmental factors and COVID-19 by applying RepOrting standards for Systematic Evidence Syntheses (ROSES) with the designed research question. Five temperature and humidity-related themes were deduced via the review processes, namely 1) The link between solar activity and pandemic outbreaks, 2) Regional area, 3) Climate and weather, 4) Relationship between temperature and humidity, and 5) the Governmental disinfection actions and guidelines. A significant relationship between solar activities and pandemic outbreaks was reported throughout the review of past studies. The grand solar minima (1450-1830) and solar minima (1975-2020) coincided with the global pandemic. Meanwhile, the cooler, lower humidity, and low wind movement environment reported higher severity of cases. Moreover, COVID-19 confirmed cases and death cases were higher in countries located within the Northern Hemisphere. The Blackbox of COVID-19 was revealed through the work conducted in this paper that the virus thrives in cooler and low-humidity environments, with emphasis on potential treatments and government measures relative to temperature and humidity. HIGHLIGHTS: • The coronavirus disease 2019 (COIVD-19) is spreading faster in low temperatures and humid area. • Weather and climate serve as environmental drivers in propagating COVID-19. • Solar radiation influences the spreading of COVID-19. • The correlation between weather and population as the factor in spreading of COVID-19.

Multicentric reticulohistiocytosis post-COVID-19: a case report.

Background: Multicentric reticulohistiocytosis (MRH) stands as a rare and challenging systemic granulomatous disease characterized by its predilection for skin and joint involvement, confounding clinicians with its infrequent presentation and systemic manifestations. Case Description: This compelling case presentation unravels the intricate complexity of MRH, exemplifying its unique clinical course. Following mild upper respiratory coronavirus disease 2019 (COVID-19) symptoms, the patient manifested purplish-pink papular lesions on both the skin and mucosa, accompanied by debilitating arthralgias. A diagnostic skin biopsy, a pivotal tool in MRH diagnosis, confirmed the presence of this granulomatous disorder, underlining its systemic impact. Strategic therapeutic intervention involving a combination of steroids and methotrexate demonstrated remarkable efficacy, culminating in the resolution of symptoms within 3-month. The absence of malignancy upon thorough screening further amplifies the perplexing nature of MRH. Conclusions: This seminal case not only bridges the realms of rare systemic disorders but also marks the first known instance of MRH emerging post-COVID-19. It underscores the imperative consideration of MRH in analogous scenarios and provides invaluable insights into the nuanced interplay of MRH symptoms, diagnosis, and therapeutic strategies following viral triggers. This comprehensive exploration enriches our scientific understanding, offering nuanced perspectives on the manifestations and intricate dynamics of MRH in the context of post-viral sequelae.

COVID-19 infection with severe hypocalcaemia and superior mesenteric artery syndrome-a case report.

Background: Coronavirus disease 2019 (COVID-19) infection has been associated with various endocrinopathies. Few literatures have reported cases of transient hypoparathyroidism in acute COVID-19 infections, or even exacerbation of hypocalcaemia in previously known hypoparathyroidism patients. The mechanism of hypocalcaemia in COVID-19 infection remains unclear. Case Description: Our patient is a young gentleman who was incidentally diagnosed with superior mesenteric artery (SMA) syndrome and symptomatic primary hypoparathyroidism while presenting with an acute COVID-19 infection. He initially presented with high-grade fever, followed by multiple episodes of vomiting and abdominal pain and subsequently hypocalcaemic symptoms such as tonic-clonic seizures and carpopedal spasms. A computed tomographic scan of his abdomen revealed a SMA syndrome while his blood investigation showed a parathyroid hormone (PTH)-dependent hypocalcaemia. His SMA syndrome was a result of severe malnourishment and improved with refeeding, but his primary hypoparathyroidism persisted despite having recovered for 6 months from the initial COVID-19 infection. There was no evidence to suggest a congenital cause of hypoparathyroidism. Conclusions: To the best of our knowledge this is the first case report that describe this unique case of persistent primary hypoparathyroidism related to COVID-19 infection. Parathyroid gland involvement in a COVID-19 infection is rare but not impossible. Further studies are needed to determine the mechanism and extent of damage of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to the parathyroid glands.

Oral ulcer in SARS-CoV-2 infection: a case report.

Background: The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at the end of 2019 caused the global pandemic. Oral and dermatological manifestations of coronavirus disease 2019 (COVID-19) such as xerostomia, aphthous-like lesions, ulcers, tongue depapillation, necrotizing gingivitis, and taste disorders, including the loss of taste and salivary gland infections are being reported. This study aims to describe a case of oral ulcers following COVID-19 infection. Case Description: We present the case of a 95-year-old male patient hospitalized in follow-up care and rehabilitation unit, of Minimes Geriatric Clinic, Toulouse, France. He had an alteration in his general health in the context of COVID-19 infection detected by reverse transcription polymerase chain reaction (RT-PCR). Six days after the admission, the patient complained of a strong burning sensation of the mouth, especially on the tongue and the lips' mucosa. Intraoral examination revealed painful erosive areas on the lateral edges of the tongue and the mucous side of the lower lip. The proposed treatment to reduce the burning sensation was based on general analgesics (morphine sulfate), mouthwash with sodium bicarbonate, the application of a lidocaine-based oral anesthetic and healing gel and a comfort-oriented diet. Thirteen days later, the patient reported a gradual improvement. Conclusions: A diverse range of oral manifestations has been observed in patients with a history of COVID-19 infection. These oral ulcers significantly impact the quality of life of the individual, causing intense pain, stress, and difficulties in eating, with repercussions on nutritional status, especially in older individuals. Our case underscores the importance of oral examinations and the role of dentists in the management of patients with SARS-CoV-2.

Effect of simulation-based zoom learning on clinical decision-making among undergraduate nursing students and experiences of students and instructors: A mixed methods study.

Aim: To determine the effect of simulation-based Zoom learning (SBZL) on perceived capabilities and clinical decision-making skills among undergraduate nursing students and to explore experiences of the instructors and students participating in SBZL. Background: Nursing is a practice profession and students acquire clinical decision-making skills in clinical settings. However, the COVID-19 pandemic has disrupted conventional clinical learning activities. In this study, the outcomes of implementing SBZL in an undergraduate programme to support students' clinical learning were examined. Design: A mixed methods design was employed. Methods: This study recruited 195 final-year students to participate in the SBZL programme, which was developed based on the NLN Jeffries Simulation Theory to guide its design, implementation and evaluation. Case scenarios were developed and simulated through Zoom. Students' perceived capabilities, perceptions of the learning environment and clinical decision-making skills were assessed before and after SBZL. A historical control group of 226 previous final year students who had received a clinical practicum was included for comparison. Semi-structured interviews were conducted with 11 instructors and 19 students to explore their experiences of participating in SBZL. Results: A total of 102 students completed the post-SBZL questionnaire. An increase in perceived creative thinking (mean difference = 0.24, p < 0.001) was observed post-SBZL. After SBZL, the perceptions of the learning environment were significantly improved. However, the SBZL group demonstrated lower perceived problem-solving capability than the control group (mean difference = 0.14, p = 0.007). Clinical decision-making was significantly improved in the SBZL group than in the control group (p < 0.001). Both the instructors and students reported positive experiences with SBZL, and highlighted challenges and factors for improving its implementation. Conclusions: SBZL showed improvement in perceived creative thinking, perceptions of the learning environment and clinical decision-making. This innovative teaching and learning method can be valuable for nursing education in various regions to prepare students for real-life roles. Tweetable abstract: Simulation-based Zoom learning is better than traditional teaching in improving clinical decision-making skills among undergraduate nursing students.

Quantitative assay to analyze neutralization and inhibition of authentic Middle East respiratory syndrome coronavirus.

To date, there is no licensed vaccine for Middle East respiratory syndrome coronavirus (MERS-CoV). Therefore, MERS-CoV is one of the diseases targeted by the Coalition for Epidemic Preparedness Innovations (CEPI) vaccine development programs and has been classified as a priority disease by the World Health Organization (WHO). An important measure of vaccine immunogenicity and antibody functionality is the detection of virus-neutralizing antibodies. We have developed and optimized a microneutralization assay (MNA) using authentic MERS-CoV and standardized automatic counting of virus foci. Compared to our standard virus neutralization assay, the MNA showed improved sensitivity when analyzing 30 human sera with good correlation of results (Spearman's correlation coefficient r = 0.8917, p value < 0.0001). It is important to use standardized materials, such as the WHO international standard (IS) for anti-MERS-CoV immunoglobulin G, to compare the results from clinical trials worldwide. Therefore, in addition to the neutralizing titers (NT50 = 1384, NT80 = 384), we determined the IC50 and IC80 of WHO IS in our MNA to be 0.67 IU/ml and 2.6 IU/ml, respectively. Overall, the established MNA is well suited to reliably quantify vaccine-induced neutralizing antibodies with high sensitivity.

A Case of COVID-19 Pneumonia Leading to Acute Respiratory Distress Syndrome (ARDS) and Multi-organ Failure Requiring Extracorporeal Membrane Oxygenation (ECMO) for Six Months and an Associated Critical Limb Ischemia.

This article presents the case of a 57-year-old woman with a history of rheumatoid arthritis who developed severe coronavirus disease 2019 (COVID-19) pneumonia that progressed to acute respiratory distress syndrome (ARDS) and multi-system organ failure. Despite initial slow progression and multiple hospital readmissions, her condition rapidly deteriorated, leading to full respiratory failure requiring intubation and ventilation. She was transferred to a specialized center where she underwent extracorporeal membrane oxygenation (ECMO) and hemodialysis for acute renal failure. Unfortunately, she remained dependent on ECMO for an extended period of six months. Although she made a gradual recovery, the prolonged critical care treatment resulted in critical ischemia of multiple extremities, necessitating a below-knee amputation (BKA) of her left lower extremity and transmetatarsal amputations of her right hand. This case reports one of the longest ECMO treatments for COVID-19 and associated comorbidities in the literature. Clinicians could include a longer duration of treatment and potential associated disabilities in the informed consent.

Immunohistochemical and Morphometric Analysis of Lung Tissue in Fatal COVID-19.

The primary targets of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the lungs are type I pneumocytes, macrophages, and endothelial cells. We aimed to identify lung cells targeted by SARS-CoV-2 using viral nucleocapsid protein staining and morphometric features on patients with fatal COVID-19. We conducted a retrospective analysis of fifty-one autopsy cases of individuals who tested positive for SARS-CoV-2. Demographic and clinical information were collected from forensic reports, and lung tissue was examined for microscopic lesions and the presence of specific cell types. Half of the evaluated cohort were older than 71 years, and the majority were male (74.5%). In total, 24 patients presented diffuse alveolar damage (DAD), and 50.9% had comorbidities (56.9% obesity, 33.3% hypertension, 15.7% diabetes mellitus). Immunohistochemical analysis showed a similar pattern of infected macrophages, infected type I pneumocytes, and endothelial cells, regardless of the presence of DAD (p > 0.5). The immunohistochemical reactivity score (IRS) was predominantly moderate but without significant differences between patients with and without DAD (p = 0.633 IRS for type I pneumocytes, p = 0.773 IRS for macrophage, and p = 0.737 for IRS endothelium). The nucleus/cytoplasm ratio shows lower values in patients with DAD (median: 0.29 vs. 0.35), but the difference only reaches a tendency for statistical significance (p = 0.083). Our study confirms the presence of infected macrophages, type I pneumocytes, and endothelial cells with a similar pattern in patients with and without diffuse alveolar damage.

Olfactory Dysfunction in COVID-19 Patients in a Tertiary Care Hospital; A Cross-Sectional Observational Study.

Introduction: Sudden onset of olfactory dysfunction (OD) manifesting as hyposmia and/or anosmia occurred in many COVID-19 patients, with a frequency as high as 85.6%. Given the morbidity and mortality of COVID-19, it is important to recognize the symptoms early so that the infected person can be diagnosed, isolated and treated early. Hence, this study was undertaken to know the prevalence of Sino-nasal symptoms with special reference to olfactory dysfunction in COVID-19 patients. Materials and Methods: It is a cross sectional observational study involving 160 COVID-19 patients aged 18 to 100 years selected by universal sampling. OD was analyzed and compared with various inflammatory markers and Sino-nasal symptoms. Patients were followed up until their discharge from the hospital or until death due to COVID-19 related health issues. Results: Out of 160 subjects included in the study, 61.88 % of the study participants were males and 38.13% were females. The mean age was 44.50 ± 16.43 years. A total of 51 patients (31.87%) developed OD. Fifty one (31.87%) patients developed OD (anosmia/hyposmia). Among the individuals with anosmia/hyposmia, majority of patients (n=26) (50.98%) complained of more than 75% loss of smell sensation. Mean duration of anosmia/hyposmia was 9.92 ± 3.71 days. OD correlated with serum ferritin levels (p=0.0453). Conclusion: Anosmia/hyposmia was found in significant proportion of patients with covid-19 which correlated with the disease severity and serum ferritin levels and hence can serve as surrogate marker of disease severity.

Glycosylated SARs Cov 2 interaction with plant lectins.

Lectins are non-immune carbohydrate-binding proteins/glycoproteins that are found everywhere in nature, from bacteria to human cells. They have also been a valuable biological tool for the purification and subsequent characterisation of glycoproteins due to their carbohydrate binding recognition capacity. Antinociceptive, antiulcer, anti-inflammatory activities and immune modulatory properties have been discovered in several plant lectins, with these qualities varying depending on the lectin carbohydrate-binding site. The Coronavirus of 2019 (COVID-19) is a respiratory disease that has swept the globe, killing millions and infecting millions more. Despite the availability of COVID-19 vaccinations and the vaccination of a huge portion of the world's population, viral infection rates continue to rise, causing major concern. Part of the reason for the vaccine's ineffectiveness has been attributed to repeated mutations in the virus's epitope determinant elements. The surface of the Coronavirus envelope is heavily glycosylated, with approximately sixty N-linked oligomannose, composite, and hybrid glycans covering the core of Man3GlcNAc2Asn. Some O-linked glycans have also been discovered. Many of these glyco-chains have also been subjected to multiple mutations, with only a few remaining conserved. As a result, numerous plant lectins with specificity for these viral envelope sugars have been discovered to interact preferentially with them and are being investigated as a potential future tool to combat coronaviruses such as the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by preventing viral attachment to the host. The review will discuss the possible applications of plant lectins as anti-coronaviruses including SARS-CoV-2, antinociceptive, anti-inflammation and its immune modulating effect.

The experience of surgical cancer patients during the COVID-19 pandemic at a large cancer centre in London.

BACKGROUND: The COVID-19 pandemic has had an enormous impact on the experiences of patients across all health disciplines, especially those of cancer patients. The study aimed to understand the experiences of cancer patients who underwent surgery during the first two waves of the pandemic at Guy's Cancer Centre, which is a large tertiary cancer centre in London. METHODS: A mixed-methods approach was adopted for this study. Firstly, a survey was co-designed by the research team and a patient study group. Patients who underwent surgery during the COVID-19 pandemic were invited to take part in this survey. Results were analysed descriptively. Three discussion groups were then conducted to focus on the main themes from the survey findings: communication, COVID-19 risk management and overall experience. These discussion groups were transcribed verbatim and underwent a thematic analysis using the NVivo software package. RESULTS: Out of 1657 patients invited, a total of 250 (15%) participants took part in the survey with a mean age of 66 (SD 12.8) and 52% females. The sample was representative of a wide range of tumour sites and was reflective of those invited to take part. Overall, the experience of the cancer patients was positive. They felt that the safety protocols implemented at the hospital were effective. Communication was considered key, and patients were receptive to a change in the mode of communication from in-person to virtual. CONCLUSIONS: Despite the immense challenges faced by our Cancer Centre, patients undergoing surgery during the first two waves of the COVID-19 pandemic had a generally positive experience with minimal disruptions to their planned surgery and ongoing care. Together with the COVID-19 safety precautions, effective communication between the clinical teams and the patients helped the overall patient experience during their surgical treatment.