Featured Research

from universities, journals, and other organizations

Bacterially produced antifungal on skin of amphibians may protect against lethal fungus

Date:
November 20, 2009
Source:
American Society for Microbiology
Summary:
A new study suggests that naturally occurring bacteria on the skin of salamanders could help protect other amphibians, including some species of endangered frogs, from a lethal skin disease.

A new study suggests that naturally occurring bacteria on the skin of salamanders could help protect other amphibians, including some species of endangered frogs, from a lethal skin disease. The researchers from James Madison University, Harrisonburg, Virginia and Vanderbilt University, Nashville, Tennessee report their findings in the November 2009 issue of the journal Applied and Environmental Microbiology.

Related Articles


Batrachochytrium dendrobatidis is a fungal pathogen that can cause a lethal skin disease in amphibians, however, some species remain relatively symptom free during infection. Innate immune factors, antimicrobial peptides, skin-associated microbial species, and behavior are all believed to attribute to the survival of some species over others. Researchers have found antifungal microbes to be of particular interest because their presence suggests they are mutualistic associates of amphibian species, meaning that there is a mutually beneficial relationship between the two organisms.

In a prior study Janthinobacterium lividum was identified as a bacterium that produces the anti-B. dendrobatidis metabolite violacein. Violacien was found on three of seven wild-collected red-backed salamanders (Plethodon cinereus) at concentration levels capable of inhibiting B. dendrobatidis, indicating a mutualistic community of violacein-producing bacteria. In this study researchers added J. lividum to the same species of red-backed salamanders and then exposed them to B. dendrobatidis. Results showed that adding J. lividum to the skin of the salamander increased the concentration levels of violacein already present and contributed to survival following experimental exposure to the fungus.

"Our study suggests that a threshold violacein concentration of about 18 μM on a salamander's skin prevents mortality and morbidity caused by B. dendrobatidis," say the researchers. "We show that over one-half of individuals in nature support antifungal bacteria that produce violacein, which suggests that there is a mutualism between violacein-producing bacteria and P. cinereus and that adding J. lividum is effective for protecting individuals that lack violacein-producing skin bacteria.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. M.H. Becker, R.M. Brucker, C.R. Schwantes, R.N. Harris, K.P. Minbiole. The Bacterially Produced Metabolite Violacein Is Associated with Survival of Amphibians Infected with a Lethal Fungus. Applied and Environmental Microbiology, 2009; 75 (21): 6635 DOI: 10.1128/AEM.01294-09

Cite This Page:

American Society for Microbiology. "Bacterially produced antifungal on skin of amphibians may protect against lethal fungus." ScienceDaily. ScienceDaily, 20 November 2009. <www.sciencedaily.com/releases/2009/11/091119212100.htm>.
American Society for Microbiology. (2009, November 20). Bacterially produced antifungal on skin of amphibians may protect against lethal fungus. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2009/11/091119212100.htm
American Society for Microbiology. "Bacterially produced antifungal on skin of amphibians may protect against lethal fungus." ScienceDaily. www.sciencedaily.com/releases/2009/11/091119212100.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Dinosaur Species Found in Museum Collection

New Dinosaur Species Found in Museum Collection

Reuters - Innovations Video Online (Nov. 27, 2014) A British palaeontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum. Pentaceratops aquilonius was related to Triceratops and lived at the end of the Cretaceous Period, around 75 million years ago. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins