Microbacterium paraoxydans is a Gram-positive bacterium from the genus of Microbacterium which was first isolated from the fish Nile tilapia in Mexiko. This bacterium can cause disease in fish. Microbacterium paraoxydans metabolize (RS)-mandelonitrile to (R)-(-)mandelic acid. Microbacterium paraoxydans is a plant growth-promoting bacteria.