257 results match your criteria studied sneeze


CFD Simulation of the Airborne Transmission of COVID-19 Vectors Emitted during Respiratory Mechanisms: Revisiting the Concept of Safe Distance.

ACS Omega 2021 Jul 23;6(26):16876-16889. Epub 2021 Jun 23.

Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.

The airborne transmission of the COVID-19 virus has been suggested as a major mode of transmission in recent studies. In this context, we studied the spatial transmission of COVID-19 vectors in an indoor setting representative of a typical office room. Computational fluid dynamics (CFD) simulations were performed to study the airborne dispersion of particles ejected due to different respiratory mechanisms, i. Read More

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Rationale and Design of a Panel Study Investigating Six Health Effects of Airborne Pollen: The EPOCHAL Study.

Front Public Health 2021 18;9:689248. Epub 2021 Jun 18.

Swiss Tropical and Public Health Institute, Basel, Switzerland.

While airborne pollen is widely recognized as a seasonal cause of sneezing and itchy eyes, its effects on pulmonary function, cardiovascular health, sleep quality, and cognitive performance are less well-established. It is likely that the public health impact of pollen may increase in the future due to a higher population prevalence of pollen sensitization as well as earlier, longer, and more intense pollen seasons, trends attributed to climate change. The effects of pollen on health outcomes have previously been studied through cross-sectional design or at two time points, namely preceding and within the period of pollen exposure. Read More

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Depressive Symptomatology and Practice of Safety Measures among Undergraduate Students during COVID-19: Impact of Gender.

Int J Environ Res Public Health 2021 05 5;18(9). Epub 2021 May 5.

Department of Health Management, College of Public Health and Health Informatics, University of Ha'il, Ha'il 81451, Saudi Arabia.

The COVID-19 pandemic has greatly affected the personal and academic lives of undergraduates in Saudi Arabia. Although studies have suggested that COVID-19 increased the prevalence of psychological health problems among undergraduates, the associations between the risk of depression and safety practices and the influence of gender on these associations have not been studied in detail. A cross-sectional online survey was conducted among preparatory-year undergraduates in a large public university in Saudi Arabia during the outbreak. Read More

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Higenamine alleviates allergic rhinitis by activating AKT1 and suppressing the EGFR/JAK2/c-JUN signaling.

Phytomedicine 2021 Jun 20;86:153565. Epub 2021 Apr 20.

School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China; Guangzhou Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, China. Electronic address:

Background: Allergic rhinitis (AR) is an inflammatory, immunoglobulin E (IgE)-mediated disease characterized by the typical symptoms of sneezing, rhinorrhea, nasal itching, and congestion. Higenamine (HG) is a plant-based alkaloid, possesses a wide range of activities, including vascular and tracheal relaxation, antioxidative, antiapoptotic, anti-inflammatory, and immunomodulatory activities. So far, the effect and the underlying mechanism of HG on AR have not been studied. Read More

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The protective effect of Naringenin against ovalbumin-induced allergic rhinitis in rats.

Eur Arch Otorhinolaryngol 2021 Mar 26. Epub 2021 Mar 26.

Department of Biochemistry, Faculty of Veterinary, Ataturk University, Erzurum, Turkey.

Background: Allergic rhinitis (AR) is a ubiquitous chronic disease with a growing incidence. We aimed to investigate the protective effect of naringenin against AR induced in rats.

Methods: Thirty-two Sprague Dawley rats were divided into four groups of eight animals each. Read More

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CYPRESS POLLEN SESITIZATION IN GEORGIA: CLINICAL AND MOLECULAR CHARACTERISTICS.

Georgian Med News 2021 Jan(310):101-107

Center for Allergy and Immunology Research, Tbilisi, Georgia.

Cypress pollen allergy is a widely distributed, highly prevalent and severe winter pollinosis that may be caused by several Cupresaceae species around the Mediterranean basin, in North America and Asia. Exposure to cypress pollen has increased steadily over the last few decades and the prevalence of allergy to cypress pollen has also dramatically increased from 0.6% to 9. Read More

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January 2021

Indoor transmission dynamics of expired SARS-CoV-2 virus in a model African hospital ward.

J Environ Health Sci Eng 2021 Jan 22:1-11. Epub 2021 Jan 22.

Environmental Engineering Research Laboratory, Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria.

Cough and sneeze droplets' interactions with indoor air of a typical hospital clinic that could be majorly found in developing African countries were studied to investigate the effectiveness of existing guidelines/protocols being adopted in the control of the widespread coronavirus disease (COVID-19) transmission. The influences of indoor air velocity, the type, size distribution, residence time in air, and trajectory of the droplets, were all considered while interrogating the effectiveness of physical distancing measures, the use of face covers, cautionary activities of the general public, and the plausibility of community spread of the SARS-CoV-2 virus through airborne transmission. Series of 3-D, coupled, discrete phase models (DPM) were implemented in the numerical studies. Read More

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January 2021

Investigation of the molecular mechanism underlying the inhibitory activities of ethanol extract of Bombyx mori pupa-incubated Cordyceps militaris fruiting bodies toward allergic rhinitis.

Biomed Pharmacother 2021 Mar 1;135:111248. Epub 2021 Feb 1.

Department of Biotechnology and Food Technology, Southern Taiwan University of Science and Technology, Tainan 710, Taiwan. Electronic address:

Cordyceps militaris has been widely studied for its various pharmacological activities such as antitumor, anti-inflammation, and immune regulation. The binding of an allergen to IgE-sensitized mast cells in nasal mucosa triggers allergic rhinitis. We found that oral administration of 300 mg/kg of the ethanol extract prepared from silkworm pupa-cultivated Cordyceps militaris fruiting bodies significantly alleviated the symptoms of ovalbumin-induced allergic rhinitis in mice, including sneeze/scratch, mast cell activation, eosinophil infiltration, and Syk activation. Read More

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Investigating the relationship between occupational exposure to nanomaterials and symptoms of nanotechnology companies' employees.

Arch Environ Occup Health 2020 Dec 23:1-11. Epub 2020 Dec 23.

Air Pollution Research Center, Department of Occupational Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.

Purpose: The increasing use of nanomaterials in academic and industrial environments has raised concerns about the potential effects of these materials on human and the environment. Researches have shown that occupational exposure to nanomaterials can affect employees' health. Many companies are active in the field of nanotechnology in Iran. Read More

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December 2020

Effects of temperature, humidity, air quality and anthropic activities on the transmission of SARS-CoV-2: a systematic review protocol.

BMJ Open 2020 11 4;10(11):e039623. Epub 2020 Nov 4.

Department of Community Health, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.

Introduction: The current global pandemic of the virus that emerged from Hubei province in China has caused coronavirus disease in 2019 (COVID-19), which has affected a total number of 900 036 people globally, involving 206 countries and resulted in a cumulative of 45 693 deaths worldwide as of 3 April 2020. The mode of transmission is identified through airdrops from patients' body fluids such as during sneezing, coughing and talking. However, the relative importance of environmental effects in the transmission of the virus has not been vastly studied. Read More

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November 2020

Dynamics of respiratory droplets carrying SARS-CoV-2 virus in closed atmosphere.

Results Phys 2020 Dec 17;19:103482. Epub 2020 Oct 17.

Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.

From the epidemiological point of view, the lifetime of cough and sneeze droplets in the ambient atmosphere plays a significant role in the transmission rate of Coronavirus. The lifetime of indoor respiratory droplets, per se, is a function of droplet size, ambient temperature, and humidity. In the attempt to explore the effective factors of droplet lifetime, sufficient knowledge of atomic-scale interactions and dynamics of the droplet with themselves, as well as the airflow molecules in the room space, is necessary. Read More

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December 2020

An overview of filtration efficiency through the masks: Mechanisms of the aerosols penetration.

Bioact Mater 2021 Jan 11;6(1):106-122. Epub 2020 Aug 11.

Arts et Metiers Institute of Technology, CNAM, PIMM, HESAM University, F-75013, Paris, France.

The masks have always been mentioned as an effective tool against environmental threats. They are considered as protective equipment to preserve the respiratory system against the non-desirable air droplets and aerosols such as the viral or pollution particles. The aerosols can be pollution existence in the air, or the infectious airborne viruses initiated from the sneezing, coughing of the infected people. Read More

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January 2021

Double-Blind Placebo-Controlled Trial of Bepotastine Salicylate in Patients With Allergic Rhinitis.

Laryngoscope 2021 03 31;131(3):E702-E709. Epub 2020 Jul 31.

Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea.

Objectives/hypothesis: To evaluate the efficacy and safety of a slow-release form of bepotastine salicylate (HL151, Belion CR) in patients with perennial allergic rhinitis (PAR).

Study Design: Double-blind, placebo-controlled multicenter comparative study.

Methods: Two hundred seventy-two PAR patients (aged 19-65 years) were studied to determine the efficacy and safety of HL151 (20 mg once daily administration) relative to those of a placebo in terms of improvements in total and nasal symptom scores. Read More

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Selective amplification of ipRGC signals accounts for interictal photophobia in migraine.

Proc Natl Acad Sci U S A 2020 07 6;117(29):17320-17329. Epub 2020 Jul 6.

Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104;

Second only to headache, photophobia is the most debilitating symptom reported by people with migraine. While the melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGCs) are thought to play a role, how cone and melanopsin signals are integrated in this pathway to produce visual discomfort is poorly understood. We studied 60 people: 20 without headache and 20 each with interictal photophobia from migraine with or without visual aura. Read More

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Respiratory droplet generation and dispersal during nasoendoscopy and upper respiratory swab testing.

Head Neck 2020 10 4;42(10):2779-2781. Epub 2020 Jul 4.

Department of Otorhinolaryngology - Head and Neck Surgery, Changi General Hospital, Singapore.

Respiratory particle generation and dispersal during nasoendoscopy and swab testing is studied with high-speed video and laser light illumination. Video analysis reveals droplet formation in three manoeuvres during nasoendoscopy - sneezing, vocalization, and nasal decongestion spray. A capillary bridge of mucus can be seen when a nasoendoscope exits wet nares. Read More

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October 2020

Effects of ambient temperature and humidity on droplet lifetime - A perspective of exhalation sneeze droplets with COVID-19 virus transmission.

Authors:
Lea-Der Chen

Int J Hyg Environ Health 2020 08 5;229:113568. Epub 2020 Jun 5.

College of Science and Engineering, Texas A&M University - Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX, 78412-5806, USA. Electronic address:

A one-dimensional droplet evaporation model is used to estimate the droplet lifetime from evaporation in air. The mathematical model invokes assumptions of spherical symmetry, ideal gas mixture, binary diffusion, no re-condensation on droplet surface, and constant properties. Four initial droplet diameters (0. Read More

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Charged PVDF multilayer nanofiber filter in filtering simulated airborne novel coronavirus (COVID-19) using ambient nano-aerosols.

Sep Purif Technol 2020 Aug 22;245:116887. Epub 2020 Apr 22.

Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.

The novel coronavirus (COVID-19), average size 100 nm, can be aerosolized by cough, sneeze, speech and breath of infected persons. The airborne carrier for the COVID-19 can be tiny droplets and particulates from infected person, fine suspended mists (humidity) in air, or ambient aerosols in air. To-date, unfortunately there are no test standards for nano-aerosols (≤100 nm). Read More

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Association of pubovisceral muscle tear with functional capacity of urethral closure: evaluating maternal recovery from labor and delivery.

Am J Obstet Gynecol 2020 06 23;222(6):598.e1-598.e7. Epub 2019 Nov 23.

School of Nursing, University of Michigan, Ann Arbor, MI; Department of Obstetrics and Gynecology, School of Medicine, University of Michigan, Ann Arbor, MI. Electronic address:

Background: Vaginal birth is a risk factor for pubovisceral muscle tear, decreased urethral closure pressure, and urinary incontinence. The relationship between these 3 factors is complicated. Urinary continence relies on maintaining urethral closure pressure, particularly when low urethral closure pressure can usefully be augmented by a volitional pelvic muscle (Kegel) contraction just before and during stress events like a cough. Read More

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Peanut allergy among Mexican adults with allergic respiratory diseases: prevalence and clinical manifestations.

Rev Alerg Mex 2019 Jul-Sep;66(3):314-321

Hospital Civil de Guadalajara Dr. Juan I. Menchaca, Servicio de Alergia e Inmunología Clínica, Guadalajara, Jalisco, México.

Background: Peanut allergy among adults with respiratory diseases has seldom been studied within Mexico.

Objective: To establish the prevalence of peanut allergy among adults that have been diagnosed with either asthma or allergic rhinitis; we will also be describing the symptoms that are associated with peanut allergy.

Methods: We carried out a cross-sectional study through which we analyzed the corresponding data of 257 patients with allergic respiratory diseases, asthma or allergic rhinitis, all participants were 16 years of age or older, and were recruited in a consecutive manner. Read More

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Comparative Study between the Efficacy of Fentanyl, Antihistamines, and Dexmedetomidine in Suppressing Photic Sneeze Reflex during Peribulbar Block.

Anesth Essays Res 2019 Jan-Mar;13(1):40-43

Department of Anesthesia, Fayoum University, Faiyum, Egypt.

Background: The photic sneeze reflex (autosomal dominant) is a condition that causes sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection. Unexpected or sudden sneezing during injection can be a dangerous side effect in periocular injection, in which abrupt head movement may cause globe injury.

Aims: We intended to evaluate the efficacy of adding fentanyl, dexmedetomidine, and antihistamines on the incidence of the sneeze reflex associated with propofol sedation during periocular local anesthesia injections. Read More

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Prevalence of asthma, allergic rhinitis and eczema in 6-7-year-old schoolchildren from Luanda, Angola.

Allergol Immunopathol (Madr) 2019 Nov - Dec;47(6):523-534. Epub 2019 Feb 10.

Department of Allergy & Clinical Immunology, Cova da Beira University Hospital, Quinta do Alvito, 6200-251 Covilhã, Portugal; CICS - Health Sciences Research Centre, University of Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal. Electronic address:

Background: Epidemiological data have shown that the prevalence of asthma, rhinoconjunctivitis and eczema in children is still increasing, namely in Africa. However, there are no epidemiological studies on asthma or allergic diseases in Angolan children.

Objective: To study the prevalence of asthma and other allergic diseases in Angolan children. Read More

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Against NF-κB/thymic stromal lymphopoietin signaling pathway, catechin alleviates the inflammation in allergic rhinitis.

Int Immunopharmacol 2018 Aug 9;61:241-248. Epub 2018 Jun 9.

Basic Medical College, Guangzhou University of Chinese medicine, Guangzhou 510006, China.

Background: The prevalence of allergic rhinitis has risen sharply. Previous work has demonstrated the anti-inflammatory effect of catechin, including in models of allergic disease. However, the molecular mechanisms underlying this therapeutic effect remain unclear. Read More

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The Comparison of Nasaleze and Mometasone Nasal Spray to Control the Symptoms of Allergic Rhinitis.

Adv Biomed Res 2018 16;7:27. Epub 2018 Feb 16.

Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.

Background: Nasal corticosteroids are the main drug class for the treatment of allergic rhinitis, and their long-term continuous use can be problematic. The current study aimed to compare the use of Nasaleze and mometasone nasal spray in patients with allergic rhinitis.

Materials And Methods: In this study, 64 patients were studied in two groups of 32 patients. Read More

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February 2018

Pattern of allergic rhinitis among children in Ekiti, Nigeria.

Int J Pediatr Otorhinolaryngol 2018 Mar 2;106:75-79. Epub 2018 Feb 2.

Radiology Department, Ekiti State University Teaching Hospital, Ado Ekiti, Nigeria. Electronic address:

Background: Allergic rhinitis is a chronic and recurrent nasal condition. It is often neglected in children with late presentation. This study aimed at determining the prevalence, sociodemographic features, comorbid illnesses, complications and quality of life in children with allergic rhinitis in the study institution. Read More

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EAACI Position paper on the standardization of nasal allergen challenges.

Allergy 2018 08 27;73(8):1597-1608. Epub 2018 Mar 27.

Kharkiv National Medical University, Kharkiv, Ukraine.

Nasal allergen challenge (NAC) is an important tool to diagnose allergic rhinitis. In daily clinical routine, experimentally, or when measuring therapeutic success clinically, nasal allergen challenge is fundamental. It is further one of the key diagnostic tools when initiating specific allergen immunotherapy. Read More

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Individualized Treatment of Allergic Rhinitis According to Nasal Cytology.

Allergy Asthma Immunol Res 2017 Sep;9(5):403-409

Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Purpose: Nasal cytology is important in the diagnosis and treatment of nasal inflammatory diseases. Treatment of allergic rhinitis (AR) according to nasal cytology has not been fully studied. We plan to explore the individualized treatment of AR according to nasal cytology. Read More

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September 2017

Effects of leukotriene D and histamine nasal challenge on airway responsiveness and inflammation in persistent allergic rhinitis patients.

Clin Respir J 2018 Feb 1;12(2):587-594. Epub 2016 Nov 1.

State Key Laboratory of Respiratory Disease, National Clinical Research Center of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.

Background: Both histamine and leukotrienes are implicated in the pathogenesis of allergic rhinitis (AR), although the pattern and severity of the nasal response to these two potent inflammatory mediators may differ, which has not been adequately studied in patients with persistent AR.

Objective: We sought to compare the differential effects of nasal challenge with leukotriene D (LTD ) and histamine on the airway response and inflammation in patients with AR.

Methods: An open-label, crossover study was performed in 25 persistent AR patients (AR group) and 16 healthy subjects (control group). Read More

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February 2018

Risk factors for postpartum urinary incontinence.

Rev Esc Enferm USP 2016 Apr;50(2):200-7

Universidade Estadual de Campinas, Faculdade de Enfermagem, Campinas, SP, Brazil.

Objective: To investigate the risk factors for postpartum urinary incontinence (UI) and its characteristics.

Method: This was a case-control study with 344 puerperal women (77 cases and 267 controls) with up to 90 days postpartum. In a single session, participants were given a questionnaire with sociodemographic and clinical data and two others that assessed urine leakage, leakage situations, and type of UI. Read More

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Comparison of Effect of Levocetirizine or Montelukast Alone and in Combination on Symptoms of Allergic Rhinitis.

Indian J Chest Dis Allied Sci 2016 Apr-Jun;58(2):103-5

Objective. To determine the effect of levocetirizine, montelukast and the combination of both the drugs on symptoms of allergic rhinitis. Methods. Read More

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September 2018

Computer simulations of pressure and velocity fields in a human upper airway during sneezing.

Comput Biol Med 2016 Apr 2;71:115-27. Epub 2016 Feb 2.

Aeronautical & Mechanical Engineering Department, Clarkson University, Potsdam, NY, USA.

In this paper, the airflow field including the velocity, pressure and turbulence intensity distributions during sneezing of a female subject was simulated using a computational fluid dynamics model of realistic upper airways including both oral and nasal cavities. The effects of variation of reaction of the subject during sneezing were also investigated. That is, the impacts of holding the nose or closing the mouth during sneezing on the pressure and velocity distributions were studied. Read More

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