Featured Research

from universities, journals, and other organizations

How Well Do Antimicrobial Products Kill Biofilms?

Date:
August 24, 2008
Source:
Montana State University
Summary:
Scientist Darla Goeres knows that there is more than one way to grow a biofilm, a fact that she uses to make sure that when a product claims it kills "99 percent" of bacteria, it really does the job. Biofilms are the extremely common communities of bacteria that form on most wet surfaces. They range from the plaque on teeth to the slime on streamside rocks to the sludge that clogs pipes.

Montana State University scientist Darla Goeres knows that there is more than one way to grow a biofilm, a fact that she uses to make sure that when a product claims it kills "99 percent" of bacteria, it really does the job.

Related Articles


Biofilms are the extremely common communities of bacteria that form on most wet surfaces. They range from the plaque on teeth to the slime on streamside rocks to the sludge that clogs pipes.

Most biofilms are harmless, but some have been linked to ailments such as urinary tract infections, gingivitis and infections around implanted devices like artificial joints and heart valves.

"In the world that I study, everybody's trying to kill the biofilm," said Goeres, a research professor in the Department of Chemical and Biological Engineering. "But there's not a concrete answer for that, and that's why you need to understand methods."

Earlier this year, Goeres was awarded a five-year, $1.7 million contract from the Environmental Protection Agency to work on new ways to measure how well antimicrobial products perform against biofilms.

"The EPA contract provides a solid basis of support," Goeres said. "That's why we can be one of the few labs in the world that can focus on methods development."

Goeres works in the Standardized Biofilms Methods Laboratory at MSU's Center for Biofilm Engineering. There, she develops standards for growing, treating and sampling biofilms.

All biofilms are unique. They are composed of varying numbers of different bacteria, and the conditions under which these bacteria form a biofilm can make a big difference in the resulting slime. So a product designed to kill one biofilm might not work on any others, which makes proving the effectiveness of antibacterial cleaning products tricky.

"Every time a person buys a product with an EPA-approved efficacy claim, such as 'kills 99 percent of bacteria,' the public trusts the validity of the process used to prove that claim," Goeres said.

However, the method a company uses to prove its product's effectiveness can make a big difference in the test results. Until recently, most methods for testing products involved growing bacteria in a way that's not consistent with the real world, Goeres said.

"Our goal is to grow bacteria in a way that's relevant to how the bacteria exist where the product is used," she said. "That way, we can have more confidence in the product's actual effectiveness, and so can the public."

The EPA contract will allow Goeres to hire two additional undergraduate students for her lab, where they will receive training and experience that will help them continue into graduate school or biofilms jobs. The lab normally hires four to six undergraduates each year.

Goeres said her biofilm methods work, which can seem detached from the real world, is ultimately about making sure people can trust the products they're using to keep their homes clean.

"So many results depend on the process a person uses," Goeres said. "To have only one way to grow a biofilm isn't going to cut it."


Story Source:

The above story is based on materials provided by Montana State University. Note: Materials may be edited for content and length.


Cite This Page:

Montana State University. "How Well Do Antimicrobial Products Kill Biofilms?." ScienceDaily. ScienceDaily, 24 August 2008. <www.sciencedaily.com/releases/2008/08/080822120142.htm>.
Montana State University. (2008, August 24). How Well Do Antimicrobial Products Kill Biofilms?. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2008/08/080822120142.htm
Montana State University. "How Well Do Antimicrobial Products Kill Biofilms?." ScienceDaily. www.sciencedaily.com/releases/2008/08/080822120142.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Research on Bats Could Help Develop Drugs Against Ebola

Research on Bats Could Help Develop Drugs Against Ebola

AFP (Nov. 28, 2014) In Africa's only biosafety level 4 laboratory, scientists have been carrying out experiments on bats to understand how virus like Ebola are being transmitted, and how some of them resist to it. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
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
Tryptophan Isn't Making You Sleepy On Thanksgiving

Tryptophan Isn't Making You Sleepy On Thanksgiving

Newsy (Nov. 27, 2014) Tryptophan, a chemical found naturally in turkey meat, gets blamed for sleepiness after Thanksgiving meals. But science points to other culprits. Video provided by Newsy
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

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