Dictionary > Doderleins bacillus

Doderleins bacillus

Doderlein’s bacillus is a large, Gram-positive bacterium found in vaginal secretions. It is named after the German obstetrician and gynecologist, Albert Doderlein, who is regarded as one of the founders of gynecological bacteriology. He was the first to describe the vaginal microbe (in 1892) as a long, thick, non-motile bacillus. Accordingly, this microbe produces lactic acid that has bactericidal action, inhibiting the growth of other microbes, such as staphylococci. Thus, Doderlein’s bacillus provides some sort of protection in the vagina against certain potentially harmful bacteria. Doderlein’s bacillus is part of the normal microbiota in the vagina. Apparently, it establishes for two or eight weeks after birth. This is followed by a change in the floral composition, with Doderlein’s bacillus being seldom on it. Nevertheless, the normal microbiota is predominated again by lactobacilli at puberty and throughout the reproductive period. Doderlein’s bacillus is presumed to be Lactobacillus acidophilus but no consensus has been reached.

See also

  • Lactobacillus acidophilus

References

  1. Lash, A. F., & Kaplan, B. (1926). A Study of Döderlein’s Vaginal Bacillus. The Journal of Infectious Diseases, 38(4), 333–340. Retrieved from https://www.jstor.org/stable/30083253?seq=1#page-scan-tab-contents
  2. Rogosa, M., & Sharpe, M. E. (1960). Species Differentiation of Human Vaginal Lactobacilli. Journal of General Microbiology, 23(1), 197–201. https://doi.org/10.1099/00221287-23-1-197

© Biology Online. Content provided and moderated by Biology Online Editors



You will also like...

Early Mammals on Earth
Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Biological Cell Defense
Biological Cell Defense

Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

Balanced Diet
A Balanced Diet – Minerals and Proteins

Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

Ploidy
Polyploidy

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Lake Wakatipu, New Zealand
New Zealand’s Unique Geographical History

Explore why New Zealand has such unique flora and fauna, and learn why long periods of geographical isolation. This less..