Fig. 1.

Bronchoscopic evaluation of mechanically ventilated Large White Landrace pigs challenged by Pseudomonas aeruginosa. a Main right upper bronchus, prior to bacterial challenge; of note no abnormalities can be found. b After 24 h from inoculation of 15 mL of 10⁷ colony forming units of P. aeruginosa, the distal portion of the right middle bronchus is copiously filled with purulent secretions with a reduction of the distal bronchi by more than 60%. c Main right medium bronchus, prior to bacterial challenge, with no abnormalities. d After 24 h from inoculation of 15 mL of 10⁷ colony forming units of P. aeruginosa, the bronchial mucosa is highly hyperemic and retained purulent secretions are evident throughout the bronchus, almost completely obstructing distal bronchi