Pseudomonas mendocina is a Gram-negative environmental bacterium that can cause opportunistic nosocomial (hospital-acquired) infections, such as infective endocarditis and spondylodiscitis, although cases are very rare. It has potential use in bioremediation as it is able to degrade toluene. Based on 16S rRNA analysis, P. mendocina has been placed in the P. aeruginosa group.