Klebsiella pneumoniae is a type of bacteria commonly found in the environment, particularly in soil and water. It is part of the normal flora of the human gut but can cause serious infections when it enters other parts of the body. This bacterium is known for causing pneumonia, urinary tract infections, and bloodstream infections, especially in individuals with weakened immune systems. Infections caused by Klebsiella pneumoniae can be difficult to treat due to its ability to develop resistance to antibiotics. Healthcare settings are often where outbreaks occur, making it a significant concern for patient safety. Proper hygiene and infection control measures are essential to prevent its spread.