Featured Research

from universities, journals, and other organizations

Methods For Counting Airborne Bacteria Inadequate, Say Researchers

Date:
August 30, 1997
Source:
American Society For Microbiology
Summary:
Current methods for detecting and counting airborne bacteria in enclosed buildings may be inadequate and understate the total number of airborne organisms, say researchers from the University of Maryland and the U.S. Environmental Protection Agency.

Current methods for detecting and counting airborne bacteria inenclosed buildings may be inadequate and understate the total number ofairborne organisms, say researchers from the University of Maryland andthe U.S. Environmental Protection Agency in the September 1997 issueof the journal Applied and Environmental Microbiology.

Related Articles


Indoor air pollution has become a serious concern. Newer, energyefficient buildings are usually sealed, recycling the air and increasing thenumber of bacteria in the environment. An estimated 10 to 25 millionworkers in the United States show symptoms of "sick buildingsyndrome" (SBS) annually. The role of airborne bacteria in SBS is stilllargely unknown but it is generally accepted that microorganisms areinvolved.

In the study the researchers tested the effects of aerosolization onviability and colony-forming ability on several bacterial species. Thebacteria were sprayed into glass containers and then total numbers werecounted by two different methods. The first method was the methodtraditionally employed to determine indoor air quality where the thebacteria are cultured and the colonies formed are counted. The other wasdirect staining and counting of viable bacteria. The researchers foundthat less than 10 percent of the aerosolized bacteria were capable offorming colonies.

"From these results it is concluded that the bacterial strains includedin this study did not respond to standard culture methods afteraerosolization," say the researchers. "The plate [colony] count providesan estimate of only those few cells least affected by exposure to air." (J.F. Heidelberg, M. Shahamat, M. Levin, I. Rahman, G. Stelma, C.Grim, and R.R. Colwell. 1997. Effect of aerosolization onculturability and viability of gram-negative bacteria. Applied andEnvironmental Microbiology 63:3585-3588.)


Story Source:

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


Cite This Page:

American Society For Microbiology. "Methods For Counting Airborne Bacteria Inadequate, Say Researchers." ScienceDaily. ScienceDaily, 30 August 1997. <www.sciencedaily.com/releases/1997/08/970830062324.htm>.
American Society For Microbiology. (1997, August 30). Methods For Counting Airborne Bacteria Inadequate, Say Researchers. ScienceDaily. Retrieved April 19, 2015 from www.sciencedaily.com/releases/1997/08/970830062324.htm
American Society For Microbiology. "Methods For Counting Airborne Bacteria Inadequate, Say Researchers." ScienceDaily. www.sciencedaily.com/releases/1997/08/970830062324.htm (accessed April 19, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, April 19, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

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
Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Newsy (Apr. 17, 2015) Ten doctors signed a letter urging Columbia University to drop Dr. Oz as vice chair of its department of surgery, saying he plugs "quack" treatments. Video provided by Newsy
Powered by NewsLook.com
Scientists Find Link Between Gestational Diabetes And Autism

Scientists Find Link Between Gestational Diabetes And Autism

Newsy (Apr. 17, 2015) Researchers who analyzed data from over 300,000 kids and their mothers say they&apos;ve found a link between gestational diabetes and autism. Video provided by Newsy
Powered by NewsLook.com
Video Messages Help Reassure Dementia Patients

Video Messages Help Reassure Dementia Patients

AP (Apr. 17, 2015) Family members are prerecording messages as part of a unique pilot program at the Hebrew Home in New York. The videos are trying to help victims of Alzheimer&apos;s disease and other forms of dementia break through the morning fog of forgetfulness. (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


Health & Medicine

Mind & Brain

Living & Well

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