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See detailChronic infection with Chlamydia pneumoniae in asthma: a type-2 low infection related phenotype.
Calmes, Doriane ULiege; Huynen, Pascale ULiege; Paulus, Virginie ULiege et al

in Respiratory Research (2021), 22(1), 72

BACKGROUND: Chlamydia pneumoniae and Mycoplasma pneumoniae have been implicated in the pathogenesis of asthma and are responsible for chronic inflammation when host immune system fails to eradicate the ... [more ▼]

BACKGROUND: Chlamydia pneumoniae and Mycoplasma pneumoniae have been implicated in the pathogenesis of asthma and are responsible for chronic inflammation when host immune system fails to eradicate the bacteria. METHOD: We performed a prospective study on 410 patients who underwent a visit at the asthma clinic of CHU of Liege between June 2016 and June 2018 with serology testing for C. pneumoniae and M. pneumoniae. RESULTS: 65% of our asthmatic population had serum IgA and/or IgG towards C. pneumoniae, while only 12.6% had IgM and/or IgG against M. pneumoniae. Compared to seronegative asthmatics, asthmatics with IgA+ and IgG+ against C. pneumoniae were more often male and older with a higher proportion of patients with smoking history. They received higher doses of inhaled corticosteroids (ICS) and displayed lower FEV(1)/FVC ratio, higher RV/TLC ratio and lower conductance. They had higher levels of fibrinogen, though in the normal range and had lower sputum eosinophil counts. Patients with IgA- and IgG+ against C. pneumoniae were older and had higher blood monocyte counts and alpha-1-antitrypsin levels as compared to seronegative patients. Patients with IgM and/or IgG towards M. pneumoniae were more often males than seronegative asthmatics. In a subpopulation of 14 neutrophilic asthmatics with Chlamydia pneumoniae IgA + /IgG + treated with macrolides, we found a significant decrease in blood neutrophils and normalization of sputum neutrophil count but no effect on asthma quality of life and exacerbations. CONCLUSION: Positive Chlamydia serologic test is more common than positive Mycoplasma serology. Asthmatics with IgA and IgG against C. pneumoniae have more severe disease with increased airway obstruction, higher doses of ICS, more signs of air trapping and less type-2 inflammation. [less ▲]

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See detailAsthma and COPD Are Not Risk Factors for ICU Stay and Death in Case of SARS-CoV2 Infection
CALMES, Doriane ULiege; Graff, Sophie ULiege; MAES, Nathalie ULiege et al

in Journal of Allergy and Clinical Immunology: In Practice (2021), 9(1), 160-169

BACKGROUND: Asthmatics and patients with chronic obstructive pulmonary disease (COPD) have more severe outcomes with viral infections than people without obstructive disease. OBJECTIVE: To evaluate if ... [more ▼]

BACKGROUND: Asthmatics and patients with chronic obstructive pulmonary disease (COPD) have more severe outcomes with viral infections than people without obstructive disease. OBJECTIVE: To evaluate if obstructive diseases are risk factors for intensive care unit (ICU) stay and death due to coronavirus disease 2019 (COVID19). METHODS: We collected data from the electronic medical record from 596 adult patients hospitalized in University Hospital of Liege between March 18 and April 17, 2020, for severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) infection. We classified patients into 3 groups according to the underlying respiratory disease, present before the COVID19 pandemic. RESULTS: Among patients requiring hospitalization for COVID19, asthma and COPD accounted for 9.6% and 7.7%, respectively. The proportions of asthmatics, patients with COPD, and patients without obstructive airway disease hospitalized in the ICU were 17.5%, 19.6%, and 14%, respectively. One-third of patients with COPD died during hospitalization, whereas only 7.0% of asthmatics and 13.6% of patients without airway obstruction died due to SARS-CoV2. The multivariate analysis showed that asthma, COPD, inhaled corticosteroid treatment, and oral corticosteroid treatment were not independent risk factors for ICU admission or death. Male gender (odds ratio [OR]: 1.9; 95% confidence interval [CI]: 1.1-3.2) and obesity (OR: 8.5; 95% CI: 5.1-14.1) were predictors of ICU admission, whereas male gender (OR 1.9; 95% CI: 1.1-3.2), older age (OR: 1.9; 95% CI: 1.6-2.3), cardiopathy (OR: 1.8; 95% CI: 1.1-3.1), and immunosuppressive diseases (OR: 3.6; 95% CI: 1.5-8.4) were independent predictors of death. CONCLUSION: Asthma and COPD are not risk factors for ICU admission and death related to SARS-CoV2 infection. [less ▲]

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See detailCOVID-19 et asthme.
Louis, Renaud ULiege; CALMES, Doriane ULiege; Frix, Anne-Noëlle ULiege et al

in Revue medicale de Liege (2020), 75(S1), 130-132

Given the prominent role of respiratory viruses in asthma exacerbations it has been feared that the SARS-CoV-2 pandemic may result in massive irruption of asthmatic patients in the hospital emergency ... [more ▼]

Given the prominent role of respiratory viruses in asthma exacerbations it has been feared that the SARS-CoV-2 pandemic may result in massive irruption of asthmatic patients in the hospital emergency departments. It seems, however, that asthma is not a particular risk factor for SARS-COV-2 infection nor for death resulting from severe infection. Inhaled corticosteroids (ICS) were found to reduce expression of ACE2 receptor in sputum cells, thereby maybe reducing the risk of lung infection. Only the more severe asthmatic patients treated with oral corticoids or high dose ICS were found to be at risk of death, presumably because of associated comorbidities. Biologicals directed towards IgE or interleukin-5 do not seem to confer an increased risk of severe infection. [less ▲]

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