Featured Research

from universities, journals, and other organizations

Scientists focus on role of ventilation in preventing tuberculosis transmission

Date:
May 7, 2014
Source:
PLOS
Summary:
Scientists studying the role of room ventilation in tuberculosis transmission found that students in Cape Town, South Africa, spend almost 60 percent of their day in poorly ventilated rooms, at risk of transmission.

Sample student day with measured CO2 concentrations and GPS locations (A-H).
Credit: Richardson et al.:10.1371/journal.pone.0096334.g004; CC-BY

Scientists studying the role of room ventilation in tuberculosis transmission found that students in Cape Town, South Africa, spend almost 60 percent of their day in poorly ventilated rooms, at risk of transmission, according to results published May 7, 2014, in the open access journal PLOS ONE by Eugene Richardson from Stanford University School of Medicine and colleagues. The researchers propose an increase in low-cost, WHO-compliant natural ventilation to facilitate healthy indoor environments and reduce risks.

Despite biomedical improvements to treat tuberculosis (TB), the incidence in South Africa continues to increase. TB spreads through the air, and children attending school may be particularly vulnerable to the disease because they are required to spend large amounts of time indoors in classrooms. Over one school year in a high school in Cape Town, South Africa, scientists assessed the role of schools and 'air hygiene' in TB spread or prevention by monitoring CO2 in classrooms -- using sensors carried around by students.

In the study, the authors first calculated 1000ppm as the indoor CO2 concentration threshold above which indicates a high amount of rebreathed air and increased risk of TB transmission. This level falls in line with regulations in other industrialized nations.

During the monitoring study, the authors found that students may spend up to 60% of their time in classrooms with CO2 levels above the 1000 ppm threshold, at risk for TB transmission. The classrooms with the highest levels of CO2 had windows on only one side of the room. Although calculating the CO2 threshold may differ depending on the variables used, given the high instances of TB-positive high school adolescents in South Africa, the authors recommend increasing natural ventilation, which will lower CO2 concentrations and reduce the risk of spreading TB in schools. This recommendation may be one low-cost intervention for helping control the TB epidemic in areas of high prevalence.

Eugene Richardson added, "It seems that -- in an era of effective treatment -- current TB prevention programs have become complacent in promoting the prevention benefits of ventilation."


Story Source:

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


Journal Reference:

  1. Eugene T. Richardson, Carl D. Morrow, Darryl B. Kalil, Linda-Gail Bekker, Robin Wood. Shared Air: A Renewed Focus on Ventilation for the Prevention of Tuberculosis Transmission. PLoS ONE, 2014; 9 (5): e96334 DOI: 10.1371/journal.pone.0096334

Cite This Page:

PLOS. "Scientists focus on role of ventilation in preventing tuberculosis transmission." ScienceDaily. ScienceDaily, 7 May 2014. <www.sciencedaily.com/releases/2014/05/140507212245.htm>.
PLOS. (2014, May 7). Scientists focus on role of ventilation in preventing tuberculosis transmission. ScienceDaily. Retrieved August 30, 2014 from www.sciencedaily.com/releases/2014/05/140507212245.htm
PLOS. "Scientists focus on role of ventilation in preventing tuberculosis transmission." ScienceDaily. www.sciencedaily.com/releases/2014/05/140507212245.htm (accessed August 30, 2014).

Share This




More Earth & Climate News

Saturday, August 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Volcano Erupts on Papua New Guinea

Raw: Volcano Erupts on Papua New Guinea

AP (Aug. 29, 2014) Several communities were evacuated and some international flights were diverted on Friday after one of the most active volcanos in the region erupts. (Aug. 29) Video provided by AP
Powered by NewsLook.com
Raw: Small Volcanic Eruption in Iceland

Raw: Small Volcanic Eruption in Iceland

AP (Aug. 29, 2014) Icelandic authorities briefly raised the aviation warning code to red on Friday during a small eruption at the Holuhraun lava field in the Bardabunga volcano system. (Aug. 29) Video provided by AP
Powered by NewsLook.com
As Drought Continues LA "water Police" Fight Waste

As Drought Continues LA "water Police" Fight Waste

AFP (Aug. 29, 2014) In the midst of a historic drought, Los Angeles is increasing efforts to go after people who waste water. Five water conservation "cops" drive around the city every day educating homeowners about the drought. Duration: 02:17 Video provided by AFP
Powered by NewsLook.com
Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) 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:
from the past week

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