Mitsuokella dentalis

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Bacteroides (2)

Strain Associated

DSM 3688 (2)


Gram-negative rods (2)



56 to 60 mol% (2)

End Product of Metabolism

acetate and succinate (2)


Mitsuokella dentalis can cause Periodontitis (2). Periodontitis is a gum infection that damages any soft tissue and destroys the bone that supports your teeth (3). This can cause tooth loss or worse. It can be very common but it also preventable. If you don’t brush your teeth for a couple of days, the plaque that has grown on your teeth will begin to harden, and cause tarter to grow (3). Tarter then makes it harder for the plaque to disappear and will irritate your gums around the base of your teeth and cause periodontitis (3). Some factors that can increase your change of getting periodontitis is gingivitis, poor oral habits, tobacco sue, diabetes, poor nutrition, etc (3). Make sure you brush your teeth as directed, and floss regularly, and make sure you have regular check ups with your dentist for cleanings.


Mitsuokella dentalis is made up of gram-negative rods (2). The cell is non-motile, non-sporeforming, and approximately 0.7 μm wide by 1 to 2 μm long. Since the cells are anaerobic, they can grow better on a blood agar media with hemolysed blood than when they are placed in a liquid media. The growth is very poor if they are placed in a liquid media (2).


The appearance of Mitsuokella dentalis was determined by a culture and DNA probe detection. There were four hundred and eighty patients who experienced periodontitis; they were transported in VMGA II, and then plated onto a brucella agar that had 5% of sheep blood and was incubated anaerobically for seven days (1). After seven days in the incubator the results were back and resembled a water drop and biochemical characteristics (1). A DNA probe detection was then performed using a digoxigenin-labeled cellular M. denalis DNA probe in a dot-blot assay (1). The culture and the DNA probe both identified Mitsuokella dentalis in 18.1% and in 80.7% of the study patients (1). The results showed that Mitsuokella dentalis is a constituent of the pathogenic microbiota in human periodontitis (1).


[1] [ Flynn, M J & Li, G & Slots, J. (1994). Mitsuokella dentalis in human periodontitis. Oral microbiology and immunology, 9]

[2] [ Haapasalo, M., Ranta, H., Shah, H., Ranta, K., Lounatmaa, K., Kroppenstedt, R. “Mitsuokella dentalis sp. nov. from Dental”. International Journal of Systematic and Evolutionary Microbiology, 1986. Volume 36, NO 4. p. 566-568]

[3] [ "Periodontitis." Treatment at Mayo Clinic. 1998-2014 Mayo Foundation for Medical Education and Research, n.d. Web. 12 Mar. 2014.]

Edited by Heather Sanborn, student of Rachel Larsen at the University of Southern Maine