	Neisseria flava (Latin: "flava", yellow, golden) is a bacterium belonging to a group of species under the genus "Neisseria" that is considered non-pathogenic. Along with its other members of the non-pathogenic group, Neisseria flava is often found in the upper respiratory tract surface in humans. On rare occasions, it can cause rheumatic heart disease and ventricular septal defect aortic insufficiency.