129,740 results match your criteria confirmed cases


Nationwide Seroprevalence of SARS-CoV-2 in Saudi Arabia.

J Infect Public Health 2021 Apr 24;14(7):832-838. Epub 2021 Apr 24.

King Abdullah International Medical Research Center, Riyadh, Saudi Arabia; King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.

Background: Estimated seroprevalence of Coronavirus Infectious Disease 2019 (COVID-19), caused by the Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2) is a critical evidence for a better evaluation of the virus spread and monitoring the progress of COVID-19 pandemic in a population. In the Kingdom of Saudi Arabia (KSA), SARS-CoV-2 seroprevalence has been reported in specific regions, but an extensive nationwide study has not been reported. Here, we report a nationwide study to determine the prevalence of SARS-CoV-2 in the population of KSA during the pandemic, using serum samples from healthy blood donors, non-COVID patients and healthcare workers (HCWs) in six different regions of the kingdom, with addition samples from COVID-19 patients. Read More

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Rate of treatment success and associated factors in the program for drug susceptible tuberculosis in the Forest Region, Republic of Guinea, 2010-2017: a real-world retrospective observational cohort study.

Int J Infect Dis 2021 Jun 9. Epub 2021 Jun 9.

Centre Hospitalier Régional Spécialisé, Quartier Fassankoni, Commune urbaine Macenta, Région N'Zérékoré, Région Forestière, Guinée; Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland.

Objectives: To analyze the treatment success rate (TSR = sum of cured or treatment completed) in the tuberculosis (TB) program for drug susceptible TB (DS-TB) of the "Centre Hospitalier Régional Spécialisé" in Macenta, Forest Region, Republic of Guinea.

Methods: This cohort study included patients starting treatment for DS-TB between 2010 and 2017. Data collection was part of the documentation for the national TB program. Read More

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Prediction and interpretation of rare missense variant in OTOG associated with hearing loss.

Genomics 2021 Jun 9. Epub 2021 Jun 9.

Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran. Electronic address:

OTOG encodes for otogelin, a component of the tectorial membrane. This gene is associated with nonprogressive mild-to-moderate hearing loss. However, no studies have yet identified the association between OTOG variation and severe-to-profound hearing loss. Read More

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Exploring early prevention and control of COVID-19 outbreak based on system dynamics model analysis.

Zhejiang Da Xue Xue Bao Yi Xue Ban 2021 Feb;50(1):41-51

School of Economics and Management,Chang'an University,Xi'an 710064,China.

To explore early prevention and control of coronavirus disease 2019 (COVID-19) outbreak based on system dynamics model analysis. The data of early outbreak of COVID-19 were collected from the World Health Organization,covering countries of the China,United States,United Kingdom,Australia,Serbia and Italy. The susceptible-exposed-infected-recovered (SEIR) model was generalized and then its parameters were optimized. Read More

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February 2021

Predicting COVID-19 epidemiological trend by applying population mobility data in two-stage modeling.

Zhejiang Da Xue Xue Bao Yi Xue Ban 2021 Feb;50(1):68-73

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases,Zhejiang University,Hangzhou 310003,China.

:To predict the epidemiological trend of coronavirus disease 2019 (COVID-19) by mathematical modeling based on the population mobility and the epidemic prevention and control measures. : As of February 8,2020,the information of 151 confirmed cases in Yueqing,Zhejiang province were obtained,including patients' infection process,population mobility between Yueqing and Wuhan,etc. To simulate and predict the development trend of COVID-19 in Yueqing, the study established two-stage mathematical models,integrating the population mobility data with the date of symptom appearance of confirmed cases and the transmission dynamics of imported and local cases. Read More

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February 2021

Impact of socioeconomic status,population mobility and control measures on COVID-10 development in major cities of China.

Zhejiang Da Xue Xue Bao Yi Xue Ban 2021 Feb;50(1):52-60

Yale School of Public Health,Yale University,New Haven 06520,Connecticut,USA.

:To evaluate the impact of socioeconomic status,population mobility,prevention and control measures on the early-stage coronavirus disease 2019 (COVID-19) development in major cities of China. : The rate of daily new confirmed COVID-19 cases in the 51 cities with the largest number of cumulative confirmed cases as of February 19,2020 (except those in Hubei province) were collected and analyzed using the time series cluster analysis. It was then assessed according to three aspects,that is, socioeconomic status,population mobility,and control measures for the pandemic. Read More

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February 2021

Quantitative perfusion histogram parameters of dynamic contrast-enhanced MRI to identify different pathological types of uterine leiomyoma.

Zhejiang Da Xue Xue Bao Yi Xue Ban 2021 Feb;50(1):97-105

Department of Radiology,Shaoxing People's Hospital,Shaoxing 312000,Zhejiang Province,China.

:To explore the value of quantitative perfusion histogram parameters of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in pathological classification of uterine leiomyoma and its correlation with Ki-67 protein expression. Thirty five patients with uterine leiomyoma confirmed by operation and pathology at Shaoxing People's Hospital from October 2015 to September 2017 were analyzed retrospectively,including 15 cases of ordinary type,8 cases of cellular type and 12 cases of degenerative type. All patients were examined by pelvic DCE-MRI before operation,and the histogram parameters (median,mean,skewness,kurtosis,energy,entropy) of various quantitative perfusion parameters,including volume transport constant (K),rate constant (K),extravascular extracellular space distribute volume per unit tissue volume (V),blood plasma volume per unit volume of tissue (V) were calculated,and the efficacy of different parameters in pathological classification of uterine leiomyoma was evaluated by ROC curve. Read More

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February 2021

Impact of Wuhan lockdown on the spread of COVID-19 in China: a study based on the data of population mobility.

Zhejiang Da Xue Xue Bao Yi Xue Ban 2021 Feb;50(1):61-67

Department of Surgical Oncology,Sir Run Run Shaw Hospital,Zhejiang University School of Medicine,Hangzhou 310016,China.

This study aimed to quantitatively assess the effectiveness of the Wuhan lockdown measure on controlling the spread of coronavirus diesase 2019 (COVID-19). : Firstly,estimate the daily new infection rate in Wuhan before January 23,2020 when the city went into lockdown by consulting the data of Wuhan population mobility and the number of cases imported from Wuhan in 217 cities of Mainland China. Then estimate what the daily new infection rate would have been in Wuhan from January 24 to January 30th if the lockdown measure had been delayed for 7 days,assuming that the daily new infection in Wuhan after January 23 increased in a high,moderate and low trend respectively (using exponential, linear and logarithm growth models). Read More

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February 2021

Prognostic impact of histological review of high-grade endometrial carcinomas in a large Danish cohort.

Virchows Arch 2021 Jun 11. Epub 2021 Jun 11.

Department of Pathology, Copenhagen University Hospital, Herlev and Gentofte Hospital, Copenhagen University, Borgmester Ib Juuls Vej 73, 2730, Herlev, Denmark.

The aim of this study was to investigate the outcome of histological subtype review of high-grade endometrial carcinoma (EC) and its prognostic impact in a large well-documented Danish nationwide cohort. From the Danish Gynecological Cancer Database (DGCD) 2005-2012 cohort, we included 425 patients with an original diagnosis of high-grade EC, independent of histologic subtype. Of these, at least one hematoxylin and eosin (H&E)-stained slide from 396 cases (93. Read More

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A new family of copper-based MXenes.

Sci Rep 2021 Jun 11;11(1):12393. Epub 2021 Jun 11.

Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km. 107, Apdo. 14 Carretera Tijuana-Ensenada, Ensenada, Baja California, Mexico.

In this work, we demonstrate, through first-principles calculations, the existence of a new family of copper-based MXenes. These add up new structures to the previously reported universe and span the interest of such 2D materials for applications in heterogeneous catalysis, ion-based batteries, sensors, biomedical applications, and so on. First, we propose the MXene-like structures: CuN, CuC, and CuO. Read More

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Investigation of monogenic causes of familial breast cancer: data from the BEACCON case-control study.

NPJ Breast Cancer 2021 Jun 11;7(1):76. Epub 2021 Jun 11.

Cancer Genetics Laboratory, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.

Breast cancer (BC) has a significant heritable component but the genetic contribution remains unresolved in the majority of high-risk BC families. This study aims to investigate the monogenic causes underlying the familial aggregation of BC beyond BRCA1 and BRCA2, including the identification of new predisposing genes. A total of 11,511 non-BRCA familial BC cases and population-matched cancer-free female controls in the BEACCON study were investigated in two sequencing phases: 1303 candidate genes in up to 3892 cases and controls, followed by validation of 145 shortlisted genes in an additional 7619 subjects. Read More

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Impact of A1 Asymmetry on the Woven EndoBridge Device in Anterior Communicating Artery Aneurysms.

AJNR Am J Neuroradiol 2021 Jun 11. Epub 2021 Jun 11.

Department of Interventional Neuroradiology (J. Cortese, J. Caroff, J.-B.G., C.M., G.A., A.E., L.I., S.G., A.O., V.C., J.M., L.S.), NEURI Brain Vascular Center, Bicêtre Hospital, APHP, Paris Saclay University, Le Kremlin-Bicêtre, France.

Background And Purpose: Woven EndoBridge (WEB) devices are increasingly used to treat intracranial aneurysms. A1 asymmetry contributes to anterior communicating artery aneurysm formation and to treatment instability after coiling. We sought to evaluate whether A1 asymmetry had an impact on angiographic outcome in anterior communicating artery aneurysms treated with the WEB. Read More

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Hysteroscopy-assisted laparoscopic salpingectomy for interstitial pregnancy without cornual resection.

Fertil Steril 2021 Jun 8. Epub 2021 Jun 8.

Reproductive Biology Associates, Atlanta, Georgia.

Objective: To illustrate a novel surgical management technique for interstitial ectopic pregnancies (IP).

Design: Video description of the case, demonstration of the surgical technique, reevaluation at the 6-week postoperative follow-up, and review of the advantages of this surgical technique for IP.

Setting: Tertiary referral center. Read More

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MiR-24-3p attenuates IL-1β-induced chondrocyte injury associated with osteoarthritis by targeting BCL2L12.

J Orthop Surg Res 2021 Jun 11;16(1):371. Epub 2021 Jun 11.

Department of Orthopedics, Baoshan District Shanghai Integrated Traditional Chinese and Western Medicine Hospital, No. 181 Youyi Road, Baoshan District, Shanghai, 201999, China.

Background: MiR-24-3p has been reported to be involved in an osteoarthritis (OA)-resembling environment. However, the functional role and underlying mechanism of miR-24-3p in chondrocyte injury associated with OA remains unknown.

Methods: The expression of miR-24-3p was determined using reverse transcription quantitative PCR analysis in OA cases and control patients, as well as IL-1β-stimulated chondrocyte cell line CHON-001. Read More

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Analysis of allergen profile in patients sensitized to canine allergen and potential Can f 5 cross-reactivity with human PSA.

Int J Immunopathol Pharmacol 2021 Jan-Dec;35:20587384211023670

Department of Allergology, Clinical Immunology and Internal Medicine, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland.

Can f 5 allergy and possible cross-reactivity with human semen in which there are significant amounts of prostate-specific antigen (PSA) are particularly interesting aspects of allergy to dog. The objective of the study was to confirm cross-reactivity between human PSA and Can f 5 in a study of canine sensitised women. A total of 100 women (aged 18-73, 41 on average) with a positive history of animal fur allergy or positive skin prick tests to canine allergens were selected. Read More

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Evaluation of fully automated a priori MCO treatment planning in VMAT for head-and-neck cancer.

Phys Med 2021 Jun 8;87:31-38. Epub 2021 Jun 8.

Centre Léon Bérard, 28 rue Laennec 69373, LYON Cedex 08, France.

Purpose: Automated planning techniques aim to reduce manual planning time and inter-operator variability without compromising the plan quality which is particularly challenging for head-and-neck (HN) cancer radiotherapy. The objective of this study was to evaluate the performance of an a priori-multicriteria plan optimization algorithm on a cohort of HN patients.

Methods: A total of 14 nasopharyngeal carcinoma (upper-HN) and 14 "middle-lower indications" (lower-HN) previously treated in our institution were enrolled in this study. Read More

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Usefulness of postoperative surveillance MR for women after breast-conservation therapy: Focusing on MR features of early and late recurrent breast cancer.

PLoS One 2021 11;16(6):e0252476. Epub 2021 Jun 11.

Departments of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.

Purpose: To investigate the imaging characteristics of early and late recurrent breast cancer and the detectability of mammography, ultrasonography, and breast magnetic resonance imaging (MRI) in patients who underwent breast-conservation therapy (BCT).

Materials And Methods: Total of 1312 women with 2026 surveillance breast MRI after BCT between January 2014 and September 2018 were studied. Early recurrence was defined as newly diagnosed breast cancer and/or axillary metastasis within 12 months of surgery. Read More

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Gravitational scaling analysis on spatial diffusion of COVID-19 in Hubei Province, China.

PLoS One 2021 11;16(6):e0252889. Epub 2021 Jun 11.

Department of Geography, College of Urban and Environmental Sciences, Peking University, Beijing, P.R. China.

The spatial diffusion of epidemic disease follows distance decay law in geography and social physics, but the mathematical models of distance decay depend on concrete spatio-temporal conditions. This paper is devoted to modeling spatial diffusion patterns of COVID-19 stemming from Wuhan city to Hubei province, China. The modeling approach is to integrate analytical method and experimental method. Read More

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Microbial aspects and potential markers for differentiation between bacterial and viral meningitis among adult patients.

PLoS One 2021 11;16(6):e0251518. Epub 2021 Jun 11.

Department of Microbiology and Immunology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt.

Objectives: Meningitis is a medical emergency with permanent disabilities and high mortality worldwide. We aimed to determine causative microorganisms and potential markers for differentiation between bacterial and viral meningitis.

Methodology: Adult patients with acute meningitis were subjected to lumber puncture. Read More

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Morphological and Molecular Identification of Emerged Lophomonas blattarum Infection in Mazandaran Province, Northern Iran: First Registry-Based Study.

Acta Parasitol 2021 Jun 11. Epub 2021 Jun 11.

Toxoplasmosis Research Center, Communicable Diseases Institute, Iranian National Registry Center for Lophomoniasis (INRCL), Mazandaran University of Medical Sciences, Farah-Abad Road, P.O Box: 48471- 91971, Sari, Iran.

Background: In the last decade, several cases of bronchopulmonary lophomoniasis (BPL) have been recorded. Little information is available about epidemiological aspects on Lophomonas infection among BPL patients. The present study was aimed to investigate the prevalence of Lophomonas spp. Read More

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Comparison of Symptoms and RNA Levels in Children and Adults With SARS-CoV-2 Infection in the Community Setting.

JAMA Pediatr 2021 Jun 11. Epub 2021 Jun 11.

Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle.

Importance: The association between COVID-19 symptoms and SARS-CoV-2 viral levels in children living in the community is not well understood.

Objective: To characterize symptoms of pediatric COVID-19 in the community and analyze the association between symptoms and SARS-CoV-2 RNA levels, as approximated by cycle threshold (Ct) values, in children and adults.

Design, Setting, And Participants: This cross-sectional study used a respiratory virus surveillance platform in persons of all ages to detect community COVID-19 cases from March 23 to November 9, 2020. Read More

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An unprecedented pyridine-based dinuclear mixed-valent Re oxo-bridged complex: a solvatochromic and AIE-active probe for nanomolar detection of picric acid and trinitrotoluene.

Dalton Trans 2021 Jun 11. Epub 2021 Jun 11.

Department of Chemistry, BITS-Pilani Hyderabad Campus, Hyderabad-500078, India.

This paper describes the synthesis of an unprecedented oxo-bridged rheniumI/VII (Re) complex by treating Re2(CO)10 with a pyridyl-linked anthracene-based twisted π-conjugated ligand. The molecular structures of both the ligand and the complex are determined by analyzing IR, NMR, and HR-MS spectra and unequivocally determined using single-crystal X-ray diffraction studies. Unlike previous observations, the complexation occurs uniquely to yield an unprecedented oxo-bridged ReI/VII complex. Read More

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Cortical Thickness, Bone Density, and the Insertion Torque/Depth Integral: A Study Using Polyurethane Foam Blocks.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):423-431

Purpose: Bone density and implant primary stability parameters have been introduced that are based on calculating (1) the average of the instantaneous torque needed to keep the rotation speed of a bone density probe constant while it descends into bone or (2) the integral of the instantaneous torque-depth curve at implant insertion (I), a quantity that is equal to the insertion energy multiplied by a constant. This study aimed to determine how these two quantities are affected by the presence and thickness of a cortical bone layer.

Materials And Methods: An instantaneous torque-measuring micromotor was used to measure the density of six double-layer polyurethane foam blocks mimicking different cortical/cancellous bone combinations. Read More

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Body composition and risk of major gynecologic malignancies: Results from the UK Biobank prospective cohort.

Cancer Med 2021 Jun 10. Epub 2021 Jun 10.

Department of Endocrinology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.

Objective: To evaluate the association between body composition and subsequent risk of the major gynecologic malignancies.

Methods: This is a prospective analysis of participants from the UK Biobank. We measured baseline body composition and confirmed cancer diagnosis through linkage to cancer and death registries. Read More

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Mitigating SARS-CoV-2 in the Deployed Environment.

Mil Med 2021 Jun 11. Epub 2021 Jun 11.

Department of Surgery, US Army Institute of Surgical Research, Sam Houston, TX 78234, USA.

Introduction: Unlike other communal living environments (universities, boarding schools, and camps) that have been suspended during the COVID-19 pandemic, the deployed military force must continue its mission. Early challenges in the 2020 deployed environment included limited availability of living and quarantine space and limited testing capacity. This is a brief report of stringent quarantine strategies employed to newly arriving cohorts at a NATO and U. Read More

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Giant axonal neuropathy: cross sectional analysis of a large natural history cohort.

Brain 2021 Jun 11. Epub 2021 Jun 11.

National Institutes of Health, Neuromuscular and Neurogenetic Disorders of Childhood Section, Bethesda, MD 20892, USA.

Giant axonal neuropathy (GAN) is an ultra-rare autosomal recessive, progressive neurodegenerative disease with early childhood onset that presents as a prominent sensorimotor neuropathy and commonly progresses to affect both the peripheral nervous system and central nervous system. The disease is caused by biallelic mutations in the GAN gene located on 16q23.2, leading to loss of functional gigaxonin, a substrate specific ubiquitin ligase adapter protein necessary for the regulation of intermediate filament turnover. Read More

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The impact of non-pharmaceutical interventions on COVID-19 epidemic growth in the 37 OECD member states.

Eur J Epidemiol 2021 Jun 10. Epub 2021 Jun 10.

Evidence-Based Public Health Unit, Centre for International Health Protection, Robert Koch Institute, Nordufer 20, 13353, Berlin, Germany.

We estimated the impact of a comprehensive set of non-pharmeceutical interventions on the COVID-19 epidemic growth rate across the 37 member states of the Organisation for Economic Co-operation and Development during the early phase of the COVID-19 pandemic and between October and December 2020. For this task, we conducted a data-driven, longitudinal analysis using a multilevel modelling approach with both maximum likelihood and Bayesian estimation. We found that during the early phase of the epidemic: implementing restrictions on gatherings of more than 100 people, between 11 and 100 people, and 10 people or less was associated with a respective average reduction of 2. Read More

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Reductions of migrant population reduces the number of COVID-19 epidemic: a case study in China.

Environ Sci Pollut Res Int 2021 Jun 11. Epub 2021 Jun 11.

Department of Biostatistics, School of Public Health, Peking University, No. 38, Xueyuan Road, Haidian District, Beijing City, 100191, China.

The novel coronavirus disease (COVID-19) broke out worldwide in 2020. The purpose of this paper was to find out the impact of migrant population on the epidemic, aiming to provide data support and suggestions for control measures in various epidemic areas. Generalized additive model was utilized to model the relationship between migrant population and the cumulative number of confirmed cases of COVID-19. Read More

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A prospective study of dietary flavonoid intake and risk of glioma in US men and women.

Am J Clin Nutr 2021 Jun 10. Epub 2021 Jun 10.

Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.

Background: Flavonoids are a diverse group of plant constituents with demonstrated neuroprotective and anti-tumor effects. Flavonoid intake may decrease the risk of glioma, but the possibility of an association has not yet been investigated in humans.

Objectives: We evaluated the association between dietary flavonoid consumption and the risk of glioma. Read More

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Risk of atrioesophageal fistula with cryoballoon ablation of atrial fibrillation.

Heart Rhythm O2 2020 Aug 28;1(3):173-179. Epub 2020 May 28.

Virginia Commonwealth University Medical Center, Richmond, Virginia.

Background: Although there are considerable data on the safety of cryoablation, data on the rare but severe complication of atrioesophageal fistula (AEF) following cryoballoon ablation are limited.

Objective: To report the global, user-reported incidence of AEF associated with cryoballoon ablation for the treatment of atrial fibrillation using Medtronic's complaint database.

Methods: User-reported cryoballoon ablation complications occurring between July 1, 2009, and March 31, 2019, were reviewed to identify cases of AEF. Read More

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