Current status of the mollicute flora of humans.

Of the more than 20 species of mollicutes reported to be present in human tissues, 15 have been isolated more than once and are currently thought to typify mollicutes of human origin. In the past decade a number of new and potentially significant mollicutes have been added to the list of species inhabiting humans. As our understanding of the human mollicute flora increases, diagnostic and clinical advances should permit the identification and control of those species that are significant pathogens in human disease.