Rothia kristinae is a Gram positive bacterium.

[4] In 1974, a novel bacterium was isolated from the skin of a healthy adult woman.

[1] R. kristinae is Gram-positive, and the cells are coccoid which tend to group together as tetrads.

The optimum growth range is 25–37 °C, and is resistant to lysozyme.

[2] R. kristinae is a common skin and oral microorganism in humans.