Pseudomonas aeruginosa is a common bacterium found in various environments, including soil, water, and on surfaces. It is known for its ability to thrive in harsh conditions and can be resistant to many antibiotics, making it a significant concern in healthcare settings. This bacterium can cause infections, particularly in individuals with weakened immune systems or chronic conditions like cystic fibrosis. Infections may occur in the lungs, bloodstream, or wounds, and can lead to serious complications if not treated promptly.