Lung Abscess in Critically Ill Coronavirus Disease 2019 Patients With Ventilator-Associated Pneumonia: A French Monocenter Retrospective Study

The pulmonary vascular endothelialitis together with the high rate of distal pulmonary embolism or thrombosis extensively reported in critically ill coronavirus disease 2019 patients may impair antibiotic diffusion in the lung parenchyma of coronavirus disease 2019 patients with ventilator-associated pneumonia leading to insufficient antibiotic concentration, thus promoting lung abscess formation. We report that 17 of 119 coronavirus disease 2019 patients (14%) with ventilator-associated pneumonia developed a lung abscess. Proportion of patients receiving corticosteroids did not differ between patients with and without lung abscess. Most of lung abscess were polymicrobial. Enterobacteriaceae, Pseudomonas aeruginosa, and Staphylococcus aureus were the leading causative bacteria. Most of lung abscesses involved the right lower lobe. Three patients had concomitant pulmonary embolism or thrombosis in the territory of lung abscess. Lung abscess was retrospectively visible on chest radiograph in 29% of the patients. As the occurrence of lung abscess impacts the duration of antibiotics therapy, chest CT scan should be easily performed in case of treatment failure of ventilator-associated pneumonia despite adequate antimicrobial therapy.