Pulmonary pseudomonas aeruginosa infection
Pulmonary pseudomonas aeruginosa infection is an uncommon cause of community-acquired pneumonia but can be a common cause of nosocomial pneumonia. It becomes increasingly important in critically ill and ventilated patients.
Pneumonia due to Pseudomonas aeruginosa can occurs as several distinct syndromes 3:
- community acquired pneumonia - usually in patients with chronic lung disease
- hospital-acquired pneumonia - usually occurring in the ICU setting -ventilator associated pneumonia
- bacteremic pseudomonas aeruginosa pneumonia - usually in the neutropenic host
CT - HRCT chest
It can have a number of radiographic presenations with the commonest patterns being 1,4
- areas of ground-glass attenuation - tends to involve multiple lobes and may demonstrate an upper zonal predilection 4
- bronchial wall thickening
- peribronchial infiltration and areas of consolidation.
A pleural effusion may be present in approximately 40% of patients.
- 1. Okada F, Ono A, Ando Y et-al. Thin-section CT findings in Pseudomonas aeruginosa pulmonary infection. Br J Radiol. 2012;85 (1020): 1533-8. doi:10.1259/bjr/54468236 - Free text at pubmed - Pubmed citation
- 2. Renner RR, Coccaro AP, Heitzman ER et-al. Pseudomonas pneumonia: a prototype of hospital-based infection. Radiology. 1972;105 (3): 555-62. Radiology (abstract) - Pubmed citation
- 3. Fujitani S, Sun HY, Yu VL et-al. Pneumonia due to Pseudomonas aeruginosa: part I: epidemiology, clinical diagnosis, and source. Chest. 2011;139 (4): 909-19. doi:10.1378/chest.10-0166 - Pubmed citation
- 4. Shah RM, Wechsler R, Salazar AM et-al. Spectrum of CT findings in nosocomial Pseudomonas aeruginosa pneumonia. J Thorac Imaging. 2002;17 (1): 53-7. Pubmed citation
- 5. Crouch Brewer S, Wunderink RG, Jones CB et-al. Ventilator-associated pneumonia due to Pseudomonas aeruginosa. Chest. 1996;109 (4): 1019-29. Pubmed citation