The Role of Lung Colonization in Connective Tissue Disease-Associated Interstitial Lung Disease
2021
Ricci, Alberto | Pagliuca, Alessandra | Vermi, Morgana | Pizzirusso, Dario | Innammorato, Marta | Sglavo, Raffaele | Scarso, Francesco | Salemi, Simonetta | Laganà, Bruno | Di Rosa, Roberta | D’Ascanio, Michela
Connective tissue diseases (CTDs) may frequently manifest with interstitial lung disease (ILD), which may severely impair quality and expectation of life. CTD-ILD generally has a chronic clinical course, with possible acute exacerbations. Although several lines of evidence indicate a relevant role of infections in the acute exacerbations of CTD-ILD, little information is available regarding the prevalence of infections in chronic CTD-ILD and their possible role in the clinical course. The aim of the present retrospective study was the identification of lung microbial colonization in broncho-alveolar lavage from patients affected by stable CTD-ILD with radiologically defined lung involvement. We demonstrated that 22.7% of patients with CTD-ILD display microbial colonization by Pseudomonas aeruginosa, Haemophilus influenzae, and non-tuberculous mycobacteria. Moreover, these patients display a major radiologic lung involvement, with higher impairment in lung function tests confirmed in a multivariate logistic regression analysis. Overall, the present study provides new information on lung colonization during CTD-ILD and its possible relationship with lung disease progression and severity.
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