👉 Pseudomonas, a bacterium that is commonly found in soil and water, but can also be found in some human and veterinary pathogens. It is part of the family Gram-negative bacteria, which includes E. coli, Salmonella, and other organisms with similar characteristics. Pseudomonas is typically used as a model organism for studying bacterial pathogenesis due to its ability to survive in a wide range of conditions, including extremes such as high temperatures, low pH, and nutrient stress.