Publications by authors named "Dalphin J"

Purpose: The main objective of this study was to identify risk factors for post-percutaneous transthoracic lung biopsy (PTLB) pneumothorax and to establish and validate a predictive score for pneumothorax occurrence to identify patients eligible for outpatient care.

Material And Methods: Patients who underwent PTLB between November 1, 2012 and March 1, 2017 were retrospectively evaluated for clinical and radiologic factors potentially related to pneumothorax occurrence. Multivariate logistic regression was used to identify risk factors, and the model coefficient for each factor was used to compute a score.

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species are beneficial and dominant members of the breastfed infant gut microbiome; however, their health benefits are partially species-dependent. Here, we characterize the species and subspecies of in breastfed infants around the world to consider the potential impact of a historic dietary shift on the disappearance of subsp. in some populations.

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Background: Recent studies report very low adherence of practitioners to ATS/IDSA recommendations for the treatment of nontuberculous mycobacteria pulmonary disease (NTM-PD), as well as a great variability of practices. Type of management could impact prognosis.

Methods: To evaluate management and prognosis of patients with NTM-PD cases with respect to ATS recommendations, we conducted a multicenter retrospective cohort study (18 sentinel sites distributed throughout France), over a period of six years.

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  • The study investigates the inflammatory response in patients with chronic obstructive pulmonary disease (COPD) linked to organic dust exposure (OD-COPD) compared to those with tobacco-related COPD (T-COPD) or both.
  • It evaluates the distribution of immune cells and levels of specific cytokines in blood samples, noting significant differences between groups, particularly lower NK and CD8+ T cells in OD-COPD.
  • The findings suggest OD-COPD has a distinct inflammatory profile characterized by higher type 2 immunity cytokines and different responses to immune stimulation compared to T-COPD.
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Introduction: Hot tub lung (HTL) is a hypersensitivity pneumonitis (HP) related to inhalation of non-tuberculous mycobacteria (NTM) when exposed to ejected jet droplets from a jacuzzi. The aetiological debate is not completely settled in the literature.

Method: An observational study of 14 cases of HTL, diagnosed at the University Hospital of Besançon, France, between 2004 and 2018 according to the diagnostic criteria used in the clinic.

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This report is based on proceedings from the Exposure Assessment Tools for Hypersensitivity Pneumonitis (HP) Workshop, sponsored by the American Thoracic Society, that took place on May 18, 2019, in Dallas, Texas. The workshop was initiated by members from the Environmental, Occupational, and Population Health and Clinical Problems Assemblies of the American Thoracic Society. Participants included international experts from pulmonary medicine, occupational medicine, radiology, pathology, and exposure science.

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  • A 35-year-old man was hospitalized due to frequent pneumonia, along with two months of difficulty breathing during exertion and a persistent productive cough with thick, whitish mucus.
  • Despite receiving antibiotics, his symptoms persisted, and he experienced a weight loss of 5 kg during this time.
  • His medical history was mostly unremarkable apart from a 10 pack-year smoking history and he didn't have any issues with swallowing, fever, or chest pain.
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  • - Growing up on a farm appears to protect children from developing asthma, and this research investigates why that might be by looking at the gut microbiome in infants from 2 to 12 months old.
  • - The study found that infants exposed to farms had a certain "microbiome age" linked to lower asthma risks later on, with a 19% mediation effect from this microbiome age.
  • - The presence of butyrate, a beneficial gut metabolite, and its related bacteria and enzymes were associated with reduced asthma risk, suggesting a possible connection between gut health and lung health known as the "gut-lung axis."
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Chronic obstructive pulmonary disease (COPD) in never-smokers exposed to organic dusts is still poorly characterized. Therapeutic strategies in COPD are only evaluated in smoking-related COPD. Understanding how never-smokers with COPD behave during exercise is an important prerequisite for optimal management.

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Background: There are chronic forms of hypersensitivity pneumonitis (cHP) that can progress to pulmonary fibrosis. There is no recommended treatment for patients whose respiratory condition continues to deteriorate in spite of antigen avoidance. Whether rituximab may be beneficial to patients with cHP is unknown.

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Introduction: Hypersensitivity pneumonitis (HP) is an interstitial lung disease due to an immunological reaction to exposure, by inhalation, to a large variety of antigens. The patho-physiological mechanism remains poorly understood. The diagnosis can be challenging and requires a detailed medical history taking especially when the clinical presentation is atypical or when the causal agent remains unknown.

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Introduction: Interstitial lung diseases (ILDs) can be caused by mutations in the and genes, which encode the surfactant protein (SP) complex SP-A. Only 11 or mutations have so far been reported worldwide, of which five have been functionally assessed. In the framework of ILD molecular diagnosis, we identified 14 independent patients with pathogenic or mutations.

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  • - The study investigated the prevalence and characteristics of Chronic Obstructive Pulmonary Disease (COPD) in dairy farmers, comparing them with non-farmers who also have COPD.
  • - Out of 4788 participants screened, 101 dairy farmers with COPD (DF-COPD) and 85 non-farmers with COPD (NF-COPD) were analyzed, revealing that dairy farmers had better lung function and quality of life than non-farmers, despite lower tobacco usage.
  • - The findings suggested that COPD in dairy farmers is linked more to individual health factors than occupational dust exposure, indicating that COPD from organic dust (like that found in farming) may be less severe than that caused by smoking.
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  • - This guideline focuses on the diagnosis of hypersensitivity pneumonitis (HP) and was created by a collaboration of multiple respiratory societies, using systematic reviews and expert consensus to develop recommendations.
  • - HP is classified into two types: nonfibrotic and fibrotic, with specific diagnostic features and testing methods recommended for both, including serum IgG testing and bronchoalveolar lavage.
  • - The committee emphasized the importance of a detailed patient history and suggested further research to fill existing knowledge gaps, proposing a systematic approach to diagnosing HP that will be updated as new information emerges.
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Secondary spontaneous pneumothorax (SSP) occurs in the context of underlying pulmonary disease. Our objectives were to estimate the relationship between SSP and short term air pollution exposure with nitrogen dioxide (NO), ozone (O) and particulate matter with a diameter ≤ 10 μm (PM). Patients with SSP were included between June 1, 2009 and May 31, 2013, in 14 Emergency Departments in France.

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  • The study investigates comorbidities in patients with COPD, focusing on those exposed to organic dust (like dairy farmers) and tobacco smoking.
  • The research finds that, regardless of exposure, patients with COPD do not have a higher frequency of cardiovascular issues compared to non-COPD individuals.
  • Tobacco smoking is linked to an increased risk of cardiovascular comorbidities, while exposure to organic dust appears to lower that risk, emphasizing the importance of managing cardiovascular health in COPD patients.
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: Respiratory hazards of farming have been identified for centuries, with little focus on gender differences. We used data from the AGRICOH consortium, a collective of prospective cohorts of agricultural workers, to assess respiratory disease prevalence among adults in 18 cohorts representing over 200,000 farmers, farm workers, and their spouses from six continents.: Cohorts collected data between 1992 and 2016 and ranged in size from 200 to >128,000 individuals; 44% of participants were female.

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Allergy is a hypersensitivity reaction induced by immunological mechanisms. In asthma, allergy has a complex role and is usually IgE mediated. Allergy must be evaluated during the work up but evidence of IgE sensitivity does not mean that allergens play a role in the pathophysiology of the disease.

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Introduction: Proper diagnosis of COPD remains a challenge. Spirometry testing in primary care may help to reduce misdiagnosis, but its reliability as a diagnostic instrument needs to be assessed.

Objectives: To investigate (1) the validity of spirometry testing performed in primary care and (2) the accuracy of the diagnostic of airflow limitation obtained by these tests.

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Hypersensitivity pneumonitis and allergic bronchopulmonary aspergillosis are two forms of lung disease with presumed distinct immunoallergic mechanisms. We report the observation of a 38-year-old French farmer who, for one month, had fever and dyspnoea resistant to antibiotic therapy. A diagnosis of farmer's lung, and allergic bronchopulmonary aspergillosis was made on clinical, biological, functional and radiological evidence and according to the criteria established.

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  • COPD is linked to a higher risk of cardiovascular disease, but the reasons for this connection are not completely understood.
  • This study aimed to measure systemic arterial stiffness in mild to moderate COPD patients and see how factors like tobacco smoking and organic dust exposure influence it.
  • Results showed that patients with COPD had higher arterial stiffness compared to healthy controls when exposed to tobacco smoke, but not with organic dust alone, indicating that tobacco smoking is a significant risk factor for arterial stiffness in COPD patients.
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Background: Childhood asthma is often preceded by early wheeze. Usually, wheezing episodes are recorded retrospectively, which may induce recall bias.

Aims And Objectives: The aim of this study was to investigate true-positive recall of parent-reported wheeze at 1 year of age, its determinants, and its implications for asthma and lung function at 6 years of age.

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Background: Childhood asthma prevalence is significantly greater in urban areas compared with rural/farm environments. Murine studies have shown that TNF-α-induced protein 3 (TNFAIP3; A20), an anti-inflammatory regulator of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling, mediates environmentally induced asthma protection.

Objective: We aimed to determine the role of TNFAIP3 for asthma development in childhood and the immunomodulatory effects of environmental factors.

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