What pulmonary infection is commonly associated with cystic fibrosis?

• A. Mycobacterium tuberculosis
• B. Pneumocystis jirovecii
• C. Pseudomonas aeruginosa
• D. Staphylococcus aureus

Answer: (C)

Cystic fibrosis is a genetic disorder that primarily affects the lungs and digestive system, leading to the production of thick, viscous mucus. This mucus creates an environment conducive to bacterial growth and chronic lung infections.

Pseudomonas aeruginosa is a common pathogen associated with cystic fibrosis patients. This organism is adept at thriving in the thick mucus and forms biofilms, making it particularly difficult to eradicate with standard antibiotic treatment. The chronic colonization of Pseudomonas aeruginosa leads to recurrent respiratory infections, lung damage, and ultimately contributes to the decline in lung function in individuals with cystic fibrosis.

Given these factors, the association of Pseudomonas aeruginosa as a frequent infective agent in cystic fibrosis patients is well-established, making it the correct choice for the pulmonary infection commonly linked with this condition.