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 October 24, 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 October 24, 2014).

Share This



More Plants & Animals News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. 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