Intensive Care Airway and Lung Microbiome Network ICALM Network (ICALM)

Hospital acquired pneumonia (HAP) is the most frequent infection acquired in the Intensive Care Unit (ICU). ICU-related respiratory infections arise as a consequence of the processes of ICU care. Mechanical ventilation (MV) is potentially lifesaving, but also carries microorganisms into the lower airways, changing the native flora, and increasing the risk of Ventilator-Associated Tracheobronchitis (VAT) and Ventilator-Associated Pneumonia (VAP).

Completed project

Data concerning the characteristics of respiratory microbiota and its alterations in illness are largely limited to the respiratory microbial flora of patients with cystic fibrosis, and little is known about airway microbiota alterations in critical illness. We published the most comprehensive study on this topic, and found that mechanical ventilation, but not antibiotic administration, was associated with changes in the respiratory microbiome.

With funding from JPIAMR, we will empower a multinational team to develop common surveillance methods and monitoring approaches to build a global study of the lung microbiome in critical illness, and its associations with modifiable environmental colonisation and pneumonia in the individual patient.


Network partners

  • Ignacio Martin-Loeches, Trinity College, Ireland (Coordinator)

This network includes 17 partners, please click on the following link to see complete network composition: Network composition Intensive Care Airway and Lung Microbiome Network ICALM Network (ICALM)


Project resources

ICALM network page in HRB website