Featured Research

from universities, journals, and other organizations

Garden Microbe Foils E. Coli O157:H7 In Laboratory Tests

Date:
July 29, 2008
Source:
USDA - Agricultural Research Service
Summary:
A microbe that may be living peaceably on the beans and cucumbers in backyard gardens might someday be recruited to foil foodborne pathogens. Geneticists looked at the pathogen-fighting abilities of the farm- and garden-friendly microbe, Enterobacter asburiae, in studies begun in 2002.

The benign microbe Enterobacter asburiae can interfere with the growth of the pathogenic bacterium E. coli O157:H7, which may offer a new avenue for protecting foods like salad greens.
Credit: Photo by Peggy Greb

A microbe that may be living peaceably on the beans and cucumbers in backyard gardens might someday be recruited to foil foodborne pathogens. Agricultural Research Service (ARS) geneticist Michael B. Cooley looked at the pathogen-fighting abilities of the farm- and garden-friendly microbe, Enterobacter asburiae, in studies begun in 2002.

Related Articles


In his laboratory at the ARS Western Regional Research Center in Albany, Calif., Cooley showed that E. asburiae can significantly reduce the levels of two pathogens--Escherichia coli O157:H7 and Salmonella enterica. That happened when Cooley inoculated seeds of thale cress, a small plant often chosen for laboratory tests, with all three species of microbes.

The study, published in Applied and Environmental Microbiology in 2003, led to follow-up experiments with green leaf lettuce. In that "battle of the microbes," another rather ordinary bacterium, Wausteria paucula, befriended E. coli and enhanced its survival six-fold on lettuce leaves. The finding represented the first clear example of a microbe's supporting a human pathogen on a plant, according to Cooley.

Adding E. asburiae to the experiment again demonstrated this beneficial microbe's ability to suppress E. coli. When lettuce leaves were exposed to the three kinds of microbes, E. asburiae decreased E. coli survival 20- to 30-fold.

Cooley, who documented those findings in the Journal of Food Protection in 2006, noted that the mechanisms underlying the competition between E. asburiae and E. coli are still a mystery. In particular, more remains to be learned about the competition that takes place--among the microbes--on leaves or other plant surfaces.

In the meantime, E. asburiae shows initial promise for use as a biological control agent in science-based strategies to safen salad greens, Cooley reports.


Story Source:

The above story is based on materials provided by USDA - Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA - Agricultural Research Service. "Garden Microbe Foils E. Coli O157:H7 In Laboratory Tests." ScienceDaily. ScienceDaily, 29 July 2008. <www.sciencedaily.com/releases/2008/07/080724213604.htm>.
USDA - Agricultural Research Service. (2008, July 29). Garden Microbe Foils E. Coli O157:H7 In Laboratory Tests. ScienceDaily. Retrieved April 19, 2015 from www.sciencedaily.com/releases/2008/07/080724213604.htm
USDA - Agricultural Research Service. "Garden Microbe Foils E. Coli O157:H7 In Laboratory Tests." ScienceDaily. www.sciencedaily.com/releases/2008/07/080724213604.htm (accessed April 19, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, April 19, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Un-Bee-Lievable: Bees on the Loose After Washington Truck Crash

Un-Bee-Lievable: Bees on the Loose After Washington Truck Crash

Reuters - US Online Video (Apr. 17, 2015) A truck carrying honey bees overturns near Lynnwood, Washington, spreading boxes of live bees across the highway. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Our Love Of Puppy Dog Eyes Explained By Science

Our Love Of Puppy Dog Eyes Explained By Science

Newsy (Apr. 17, 2015) Researchers found a spike in oxytocin occurs in both humans and dogs when they gaze into each other&apos;s eyes. Video provided by Newsy
Powered by NewsLook.com
Dog Flu Spreading in Midwestern States

Dog Flu Spreading in Midwestern States

AP (Apr. 17, 2015) Dog flu is spreading in several Midwestern states. Dog daycare centers and veterinary offices are taking precautions. (April 17) Video provided by AP
Powered by NewsLook.com
Raw: Rare Whale Spotted in Gulf of Mexico

Raw: Rare Whale Spotted in Gulf of Mexico

AP (Apr. 17, 2015) Researchers from the E/V Nautilus had quite a surprise Tuesday, when a curious sperm whale swam around their remotely operated vehicle in the Gulf of Mexico. Cameras captured the encounter. (April 17) Video provided by AP
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