Pseudomonas is a genus of bacteria known for its versatility and ability to thrive in various environments, including soil, water, and even on plants. These bacteria are often rod-shaped and can be found in both beneficial and harmful forms. Some species are important for nutrient cycling, while others can cause infections in humans and animals. One of the most well-known species is Pseudomonas aeruginosa, which is an opportunistic pathogen. It can lead to serious infections, particularly in individuals with weakened immune systems or chronic conditions. Due to its resistance to many antibiotics, treating infections caused by this bacterium can be challenging.