14,486 results match your criteria winter period


Impact of the season of birth on the development of juvenile idiopathic arthritis in the United States: A nationwide registry-based study.

J Rheumatol 2021 Jun 15. Epub 2021 Jun 15.

Department of Pediatrics, Emory University School of Medicine, Atlanta, GA Department of Pediatrics, Division of Infectious diseases, Emory University School of Medicine, Atlanta, GA, and Center for Childhood Infections and Vaccines, Children's Healthcare of Atlanta, Atlanta, GA. Children's Healthcare of Atlanta, Atlanta, GA. Department of Human Genetics, Emory University School of Medicine, Atlanta, GA Department of Pediatrics and Human Genetics, Emory University School of Medicine, Atlanta, GA and Children's Healthcare of Atlanta, Atlanta, GA. Corresponding author: Sampath Prahalad, MD, MSc, Marcus Professor and Chief of Pediatric Rheumatology, Emory University School of Medicine, 1760 Haygood Drive NE, Atlanta, GA 30322; email:

Objective: Autoimmune disorders result from the interplay of genetic and environmental factors. Many autoimmune disorders are associated with specific seasons of birth implicating a role for environmental determinants in their etiopathology. We investigated if there is an association between the season of birth and development of Juvenile idiopathic arthritis (JIA). Read More

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Characterizing nitrate radical budget trends in Beijing during 2013-2019.

Sci Total Environ 2021 Jul 7;795:148869. Epub 2021 Jul 7.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.

Nitrate (NO) radical is an important oxidant in the atmosphere as it regulates the NO budget and impacts secondary pollutant formation. Here, a long-term observational dataset of NO-related species at an urban site in Beijing was used to investigate changes in the NO budget and their atmospheric impacts during 2013-2019, in this period the Clean Air Actions Plan was carried out in China. We found that (1) changes in NO precursors (NO and O) led to a significant increase in NO formation in the surface layer in winter but a decrease in summer; (2) a reduction in NO promoted thermal equilibrium, favoring the formation of NO rather than dinitrogen pentoxide (NO). Read More

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The impact of climate change in wheat and barley yields in the Iberian Peninsula.

Sci Rep 2021 Jul 29;11(1):15484. Epub 2021 Jul 29.

Instituto Dom Luiz, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal.

The impact of climate change on wheat and barley yields in two regions of the Iberian Peninsula is here examined. Regression models are developed by using EURO-CORDEX regional climate model (RCM) simulations, forced by ERA-Interim, with monthly maximum and minimum air temperatures and monthly accumulated precipitation as predictors. Additionally, RCM simulations forced by different global climate models for the historical period (1972-2000) and mid-of-century (2042-2070; under the two emission scenarios RCP4. Read More

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Molecular and epidemiological characterization of human adenovirus and classic human astrovirus in children with acute diarrhea in Shanghai, 2017-2018.

BMC Infect Dis 2021 Jul 29;21(1):713. Epub 2021 Jul 29.

Department of Clinical Laboratory, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China.

Background: In addition to rotavirus and norovirus, human adenovirus (HAdV) and classic human astrovirus (classic HAstV) are important pathogens of acute diarrhea in infants and young children. Here, we present the molecular epidemiology of HAdV and classic HAstV in children with acute diarrhea in Shanghai.

Methods: Fecal specimens were collected from 804 outpatient infants and young children diagnosed with acute diarrhea in Shanghai from January 2017 to December 2018. Read More

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Rethinking the causes of extreme heavy winter PM pollution events in northern China.

Sci Total Environ 2021 Jun 24;794:148637. Epub 2021 Jun 24.

Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266100, China; Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China. Electronic address:

It has been reported that air quality models largely underestimate PM concentrations during severe pollution events in China. In this study, the Models-3 Community Multi-scale Air Quality model (CMAQ) was employed to simulate PM concentrations in May-June (non-heating period) and in November-December (heating period) of 2013 in northern China, with a particular focus on determining the causes of the underestimation. Modeling results reproduced the mass concentrations of PM in approximately 50% of the non-heating and heating periods in Qingdao (referred to as the good periods), while the model performance was unsatisfactory during the remaining periods (the poor periods). Read More

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Observational analysiS of out-of-hospital Cardiac Arrest occurRence and temporal variability patterns in subpopulation of southern POLand from 2006 to 2018: OSCAR-POL registry.

Cardiol J 2021 Jul 27. Epub 2021 Jul 27.

Department of Health Promotion, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, Poland.

Background: Temporal variability of out-of-hospital cardiac arrest (OHCA) occurrence was presented in previous studies, however, the data regarding long-term observation is scarce. The aim of this study was to investigate the temporal variability of OHCA occurrence during the long-time period and analyze the circadian pattern within particular timeframes.

Methods: The retrospective analysis of 5058 OHCA cases was made covering the period from January 1st, 2006 to December 31st, 2018. Read More

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Inducing granulation within a full-scale activated sludge system to improve settling.

Water Sci Technol 2021 Jul;84(2):302-313

Tetra Tech, 1560 Broadway, Ste. 1400 & 1450, Denver, CO 80202, United States.

Most cold-climate biological nutrient removal facilities experience poor settling mixed liquor during winter, resulting in treatment capacity throughput limitations. The Metro Wastewater Reclamation District in Denver, Colorado, operated two full-scale secondary treatment trains to compare the existing biological nutrient removal configuration (Control) to one that was modified to operate with an anaerobic selector and with hydrocyclone selective wasting (Test) to induce granulation. Results from this evaluation showed that the Test achieved significantly better settling behaviour than the Control. Read More

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Large-scale serological screening of slaughter pigs for Toxoplasma gondii infections in The Netherlands during five years (2012-2016): Trends in seroprevalence over years, seasons, regions and farming systems.

Vet Parasitol 2019 19;276S:100017. Epub 2019 Aug 19.

Wageningen Bioveterinary Research, P.O. Box 65, 8200 AB Lelystad, the Netherlands.

Toxoplasma gondii is the causative agent of the parasitic disease toxoplasmosis, which is an important foodborne zoonosis. Eating undercooked meat of infected animals, including pigs, has been considered the major transmission route of T. gondii to humans. Read More

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Epidemiology of botulism in the north-western Romania-a 7-year survey.

Environ Sci Pollut Res Int 2021 Jul 23. Epub 2021 Jul 23.

Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, 410028, Oradea, Romania.

Botulism is a rare, acute, life-threatening neuro-paralysis. The digestive onset may raise diagnostic issues. The objective of our study was to analyze the clinical and epidemiological data of patients diagnosed with botulism and hospitalized in "Gavril Curteanu" Municipal Clinical Hospital (Oradea, Romania). Read More

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The catastrophic floods in the Guadiana River basin since 1500 CE.

Sci Total Environ 2021 Jul 21;797:149141. Epub 2021 Jul 21.

Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisbon, Portugal; Departamento de Meteorologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-916, Brazil.

The task of retrieving information about past flood events is very important to reconstruct flood series data. In this work, a wide range of different sources including newspapers, technical reports, and books was consulted in order to recover information about catastrophic flood events in Badajoz (Spain). A set of 37 catastrophic floods of the Guadiana River that occurred in Badajoz in the winter months (DJFM - December, January, February, and March) have been recovered since 1500 CE. Read More

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Long-term pollen trends and associations between pollen phenology and seasonal climate in Atlanta, Georgia (1992-2018).

Ann Allergy Asthma Immunol 2021 Jul 23. Epub 2021 Jul 23.

CDC: Centers for Disease Control and Prevention, 4770 Buford Highway MS F-58, Chamblee, GA 30341, United States.

Background: Previous research has shown airborne pollen concentrations and phenology in allergenic plants are changing. Additionally, variations in seasonal climate are known to affect pollen phenology in trees, weeds, and grasses.

Objective: We investigated localized trends in pollen concentrations and pollen phenology over time, and the effect of seasonal climate variations. Read More

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[Chemical Components and Sources of PM and Their Evolutive Characteristics in Zhengzhou].

Huan Jing Ke Xue 2021 Aug;42(8):3633-3643

College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

To explore the main sources of PM and the characteristics of seasonal differences in Zhengzhou, PM sampling was conducted in 2019 and the concentrations of inorganic water-soluble ions, carbon components, and various elements were analyzed. Results showed that the average mass concentration of PM in 2019 was (67.0±37. Read More

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[Evaluation of Air Pollution Characteristics and Air Quality Improvement Effect in Beijing and Chengdu].

Huan Jing Ke Xue 2021 Aug;42(8):3622-3632

Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China.

In recent years, China's air quality has been improving, and the concentration of atmospheric particulate matter has decreased significantly. In this study, the pollution characteristics and trends of two typical representative cities (Beijing and Chengdu) were analyzed. The geographical locations, pollution emissions, and meteorological diffusion conditions of the two cities were compared, to evaluate the relative contribution of meteorological conditions and pollution reduction regulations in decreasing fine particulate matter (PM) concentrations. Read More

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Long-term dynamics of transmission in Japan, 2005-2019.

PeerJ 2021 12;9:e11769. Epub 2021 Jul 12.

Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan.

continues to evolve, adjusting its pathogenesis and transmissibility. In the present study, we systematically collected datasets on outbreaks in Japan from 2005 to 2019 and analyzed time-dependent changes in the asymptomatic ratio, the probability of virus detection, and the probability of infection given exposure. Reports of 1,728 outbreaks were published, and feces from all involved individuals, including those with asymptomatic infection, were tested for virus in 434 outbreaks. Read More

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Body Temperature and Activity Adaptation of Short Photoperiod-Exposed Djungarian Hamsters (): Timing, Traits, and Torpor.

Front Physiol 2021 7;12:626779. Epub 2021 Jul 7.

Institute of Neurobiology, Ulm University, Ulm, Germany.

To survive the Siberian winter, Djungarian hamsters () adjust their behavior, morphology, and physiology to maintain energy balance. The reduction of body mass and the improvement of fur insulation are followed by the expression of spontaneous daily torpor, a state of reduced metabolism during the resting phase to save additional energy. Since these complex changes require time, the upcoming winter is anticipated decreasing photoperiod. Read More

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[Epidemiological characteristics of influenza and characteristics of hemagglutinin gene of B-Victoria strains in Hebei Province from 2018 to 2019].

Zhonghua Yu Fang Yi Xue Za Zhi 2021 Jul;55(7):847-852

Institute of Prevention and Treatment for Viral Diseases,Hebei Center for Disease Control and Prevention,Shijiazhuang 050021, China.

To understand the epidemiological characteristics of influenza in Hebei Province from 2018 to 2019, and to analyze the characteristics and variation of hemagglutinin(HA) gene of influenza B-Victoria(BV) strains. Throat swab specimens of influenza-like cases within 3 days of fever were collected from 28 sentinel hospitals in Hebei province, meanwhile, The surveillance data was collected by the Chinese National Influenza Surveillance Network from April 2018 to March 2019, Throat swab specimens were collected from patients with influenza-like symptoms in sentinel hospitals, and tested by RT-PCR and virus isolation. 14 influenza B-Victoria strains from different regions were selected to sequence HA gene, Phylogenetic tree and the molecular characteristics were analyzed by DNASTAR 7. Read More

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Winter survival of the unicellular green alga Micrasterias denticulata: insights from field monitoring and simulation experiments.

Protoplasma 2021 Jul 24. Epub 2021 Jul 24.

Department of Botany, Functional Plant Biology, University of Innsbruck, Sternwartestrasse 15, 6020, Innsbruck, Austria.

Peat bog pools around Tamsweg (Lungau, Austria) are typical habitats of the unicellular green alga Micrasterias denticulata. By measurement of water temperature and irradiation throughout a 1-year period (2018/2019), it was intended to assess the natural environmental strain in winter. Freezing resistance of Micrasterias cells and their ability to frost harden and become tolerant to ice encasement were determined after natural hardening and exposure to a cold acclimation treatment that simulated the natural temperature decrease in autumn. Read More

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The Prevalence and Genetic Characterization of Human Metapneumovirus in Bulgaria, 2016-2019.

Intervirology 2021 Jul 23:1-9. Epub 2021 Jul 23.

Pediatric Clinic, University Hospital Alexandrovska, Medical University, Sofia, Bulgaria.

Introduction: We investigated the prevalence of human metapneumovirus (hMPV) among patients with acute respiratory infections in Bulgaria, and performed genetic characterization of the F gene of these strains.

Methods: Nasopharyngeal swabs collected from patients of a range of ages were tested by using real-time PCR for 12 respiratory viruses. The F gene was sequenced, and phylogenetic and amino acid analyses of the F gene/protein were performed. Read More

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An evidence-based assessment of the impact of the Olympic Games on population levels of physical activity.

Lancet 2021 Jul 21. Epub 2021 Jul 21.

Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil.

Pre-Olympic Games predictions commonly include an increase in population-based physical activity in the host city, as often stated in the bid, but the post-Olympic Games effects on physical activity have not been summarised. In this Series paper, we aim to do the following: examine mentions of a physical activity legacy in pre-Olympic bid documentation; analyse existing physical activity surveillance data collected before, during, and after the Olympic Games in hosting areas around the world; and evaluate Google Trends data surrounding the London 2012 Olympic Games as a case study of community interest in the topic of exercise during the time of the Olympic Games. Before 2007, little mention of physical activity was made in pre-Olympic Games documentation, but, after that, most documents had targets for population physical activity or sports participation. Read More

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Epidemiological characteristics and incubation period of SARS-CoV-2 during the 2020-2021 winter pandemic wave in north China: an observational study.

J Med Virol 2021 Jul 24. Epub 2021 Jul 24.

School of Statistics, East China Normal University, Shanghai, China.

As the emergence of new variants of SARS-CoV-2 persists across the world, it is of importance to understand the distributional behavior of incubation period of the variants for both medical research and public health policy-making. We collected the published individual level data of 941 patients of the 2020-2021 winter pandemic wave in Hebei province, north China. We computed some epidemiological characteristics of the wave and estimated the distribution of the incubation period. Read More

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Temporal trends in the association of social vulnerability and race/ethnicity with county-level COVID-19 incidence and outcomes in the USA: an ecological analysis.

BMJ Open 2021 07 22;11(7):e048086. Epub 2021 Jul 22.

Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA

Background: The COVID-19 pandemic adversely affected the socially vulnerable and minority communities in the USA initially, but the temporal trends during the year-long pandemic remain unknown.

Objective: We examined the temporal association of county-level Social Vulnerability Index (SVI), a percentile-based measure of social vulnerability to disasters, its subcomponents and race/ethnic composition with COVID-19 incidence and mortality in the USA in the year starting in March 2020.

Methods: Counties (n=3091) with ≥50 COVID-19 cases by 6 March 2021 were included in the study. Read More

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Natural Lighting in Historic Houses during Times of Pandemic. The Case of Housing in the Mediterranean Climate.

Int J Environ Res Public Health 2021 Jul 7;18(14). Epub 2021 Jul 7.

Escuela Nacional de Sanidad, Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain.

The pandemic generated by the SARS-CoV-2 virus has led to a forced increase in the number of hours spent at home. In many cases, the lockdown situations, both in social and work terms, have meant that homes have suddenly also become workplaces. Based on all the indicators, this new relational scenario in the labor market displays a clear upward trend and is far from being a temporary situation. Read More

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Longitudinal assessment of COVID-19 vaccine acceptance and uptake among frontline medical workers in Los Angeles, California.

Clin Infect Dis 2021 Jul 22. Epub 2021 Jul 22.

Department of Epidemiology, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, USA.

Background: Sentiments of vaccine hesitancy and distrust in public health institutions have complicated the government-led COVID-19 vaccine control strategy in the United States. As the first to receive the vaccine, COVID-19 vaccine attitudes among front line workers are consequential for COVID-19 control and public opinion of the vaccine.

Methods: This study employed a repeated cross-sectional survey administered at three time points between September 24 - February 6, 2021 to a cohort of employees of University of California, Los Angeles (UCLA) Health and the Los Angeles County Fire Department (LACoFD). Read More

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Indoor NH3 variation and its relationship with outdoor NH3 in urban Beijing.

Indoor Air 2021 Jul 21. Epub 2021 Jul 21.

Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, China.

Online measurements of indoor and outdoor ammonia (NH ) were conducted at a university building in Haidian District, Beijing, to investigate their variation characteristics, indoor-outdoor differences, influencing factors, and possible contribution of indoor NH to atmospheric NH . Indoor NH3 mixing ratios varied greatly among the rooms of the same building. Indoor NH mixing ratio peaked at 1. Read More

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No increased injury incidence in the German Bundesliga after the SARS-CoV-2 virus lockdown.

Arch Orthop Trauma Surg 2021 Jul 20. Epub 2021 Jul 20.

Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany.

Introduction: The coronavirus lockdown in 2020 resulted in a worldwide suspension of professional sports. The first major professional football league to restart after the lockdown was the German Bundesliga. This study investigates whether the injury incidence increased after the restart of the season with only 9 days of regular preparation time and without any friendly matches in comparison to three control periods. Read More

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First report of Kingella kingae diagnosed in pediatric bone and joint infections in Morocco.

BMC Infect Dis 2021 Jul 20;21(1):697. Epub 2021 Jul 20.

Service de traumato-orthopédie pédiatrique, CHU Hassan II. Laboratoire Pathologie humaine Biomédecine et Environnement. Faculté de Médecine et de Pharmacie, Université Sidi Mohamemd Ben Abdellah, Fès, Morocco.

Background: The progress of diagnostic strategies and molecular methods improved the detection of Kingella kingae in bone and joint infections, and now, Kingella kingae is being increasingly recognized as the most frequent cause of bone and joint infection BJI in early childhood. The main objective of this prospective study is to report the frequency of Kingella Kingae in negative culture bone and joint pediatric infections, and to describe the clinical and biologic features of these children.

Methods: From December 2016 to June 2019, we selected all hospitalized patients with suspected BJI. Read More

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Occurrence of Cryptosporidium and Giardia in surface water supply from 2016 to 2020 in South Brazil.

Environ Monit Assess 2021 Jul 19;193(8):496. Epub 2021 Jul 19.

Chemical Engineering Department, Federal University of Rio Grande do Sul, Luiz Englert s/nº, downtown, Porto Alegre, RS, 90040-040, Brazil.

The objectives of this research are to evaluate Giardia and Cryptosporidium contamination in surface water supply in Rio Grande do Sul (RS) State in South Brazil in the years 2016 to 2020, assess seasonality, and to infer the population that may have been exposed to these protozoa through drinking water based on drinking water treatment efficiency. Data were obtained through the drinking water surveillance national information system. From 204 DWT plants in the state, 66 have been analyzed for protozoa. Read More

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Changes in climate drive recent monarch butterfly dynamics.

Nat Ecol Evol 2021 Jul 19. Epub 2021 Jul 19.

Department of Integrative Biology, Ecology, Evolution, and Behavior Program, Michigan State University, East Lansing, MI, USA.

Declines in the abundance and diversity of insects pose a substantial threat to terrestrial ecosystems worldwide. Yet, identifying the causes of these declines has proved difficult, even for well-studied species like monarch butterflies, whose eastern North American population has decreased markedly over the last three decades. Three hypotheses have been proposed to explain the changes observed in the eastern monarch population: loss of milkweed host plants from increased herbicide use, mortality during autumn migration and/or early-winter resettlement and changes in breeding-season climate. Read More

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Relationships between Vitamin D and Selected Cytokines and Hemogram Parameters in Professional Football Players-Pilot Study.

Int J Environ Res Public Health 2021 07 2;18(13). Epub 2021 Jul 2.

Department of the Biological and Medical Basis of Sport, University School of Physical Education in Wrocław, Al. Paderewskiego 35, 51-617 Wrocław, Poland.

Vitamin D affects both innate and adaptive immunity. Most of the effects of vitamin D on innate immunity are anti-inflammatory. In monocytes/macrophages, vitamin D suppresses the production of the inflammatory cytokines TNF-alpha, IL-1beta, IL-6, and IL-8. Read More

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Survey and Analysis of Age and Antiplatelet/Anticoagulation Medication Status of the Desert Regional Medical Center Emergency Department Patients.

Cureus 2021 Jun 15;13(6):e15673. Epub 2021 Jun 15.

Neurosurgery, Desert Regional Medical Center, Palm Springs, USA.

Objective To delineate whether the geographical region served by the Desert Regional Medical Center (DRMC) emergency department (ED) in Palm Springs, California has a higher percentage of patients taking antiplatelet and/or anticoagulant medications during the winter season due to the seasonal influx of elderly patients. Method We conducted a prospective study in the patients seen in the DRMC ED between November 12, 2019 and November 14, 2019, and those patients were anonymously surveyed regarding their outpatient use of antiplatelet and anticoagulant medications. Verbal consent for participation was obtained. Read More

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