Dialister invisus

Dialister invisus is a bacterial species that is mainly found in the mouths of individuals with endodontic infections. Endodontic refers to the “dental pulp”, the part in the center of a tooth that is made up of living connective tissue and cells. Endodontic infections are commonly, but not always, infections of the root canal.

It is more common to find Dialister invisus in the mouths of smokers than it is for it to be found in the oral cavities of individuals who have never smoked.

Dialister invisus is pronounced "DI-ah-LIST-uh in-VIZ-us". The species name, invisus, comes from the Latin word meaning "unseen", referring to what is described as the "lack of turbidity" of cultures of this organism. Turbidity is cloudiness, so when this species is cultured, the results are transparent.


1. Siqueira, J. F., & Ro, I. N. (2005). Uncultivated Phylotypes and Newly Named Species Associated with Primary and Persistent Endodontic Infections. Journal of Clinical Microbiology, 43(7), 3314-3319. 

2. Domann, E., Hong, G., Imirzalioglu, C., Turschner, S., Ku, J., Watzel, C., ... Chakraborty, T. (2003). Culture-Independent Identification of Pathogenic Bacteria and Polymicrobial Infections in the Genitourinary Tract of Renal Transplant Recipients. Journal of Clinical Microbiology, 41(12), 5500-5510. 

3. Vogtmann, E., Flores, R., Yu, G., Freedman, N.D., Shi, J., Gail, M.H., Dye, B.A., Wang, G.Q., Klepac-Ceraj, V., Paster, B.J., Wei, W.Q., Guo, H.Q., Dawsey, S.M., Qia,o Y.L., Abnet, C.C. (2015). Association between tobacco use and the upper gastrointestinal microbiome among Chinese men. Cancer Causes & Control, 26 (4), 581-588.

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