Corticosteroid Dosing as a Risk Factor for Pseudomonas Infection

Introduction to Risk Factors

The American Thoracic Society and European Society of Clinical Microbiology and Infectious Diseases identify corticosteroid doses ≥20 mg/day of prednisone for ≥2 weeks as a critical threshold for considering empirical coverage against P. aeruginosa 1
Doses of 10 mg of prednisone per day already represent an established risk factor for P. aeruginosa, especially in patients with community-acquired pneumonia 1
The use of >10 mg of prednisolone per day in the last 2 weeks should be considered a risk factor when selecting empirical antibiotic coverage in patients with COPD 1

Doses ≥20 mg/day of prednisone for ≥2 weeks represent the high-risk threshold for opportunistic infections, including Pseudomonas 1
The risk of infectious events increases substantially with doses ≥10 mg/day (RR 1.30) 1

The combination of corticosteroids with recent antibiotic use in the last 3 months dramatically increases the risk of P. aeruginosa 1
Antibiotic therapy with broad-spectrum antibiotics for 7 days in the last month combined with corticosteroids creates a particularly high risk 1
The combination of corticosteroids with other immunomodulators increases the risk up to 14 times 1
Advanced age and malnutrition are independent factors that potentiate the risk of corticosteroids 1

Doses <10 mg/day of prednisone are considered low risk 1
Doses 10-19 mg/day of prednisone: consider P. aeruginosa in the differential diagnosis of respiratory infections 1
Doses ≥20 mg/day for ≥2 weeks require strong consideration of empirical coverage against P. aeruginosa 1

In the perioperative context, any use of corticosteroids increases the risk of postoperative infectious complications 1
Minimizing or suspending corticosteroids before elective procedures can reduce infectious complications 1
Consider prophylaxis against Pneumocystis jirovecii in doses equivalent to prednisone ≥20 mg/day for ≥4 weeks 3

Suppression of adrenal function can persist up to 12 months after discontinuing corticosteroids 4
During stress situations in this period, it may be necessary to reinstitute or increase the hormonal dose 4