Featured Research

from universities, journals, and other organizations

Stool samples provide marker for bowel disease

Date:
March 27, 2014
Source:
Institute of Physics
Summary:
A novel method for distinguishing different types of bowel disease using the stool samples of patients has been created by a group of researchers. It works by analyzing the chemical compounds emitted from the samples and could provide cheaper, quicker and more accurate diagnoses, at the point of care, for a group of diseases that have, up until now, been very hard to distinguish.

A novel method for distinguishing different types of bowel disease using the stool samples of patients has been created by a group of researchers in the UK.

It works by analyzing the chemical compounds emitted from the samples and could provide cheaper, quicker and more accurate diagnoses, at the point of care, for a group of diseases that have, up until now, been very hard to distinguish.

The preliminary results of the test, which have been published today, 28 March, in IOP Publishing's Journal of Breath Research, show that patients with either inflammatory bowel disease (IBD) or irritable bowel syndrome (IBS) could be distinguished from each other with an overall accuracy of 76 per cent.

This was based on the volatile organic compounds (VOCs) emitted from their stool samples, which act as a proxy for conditions in the gastrointestinal tract and provide a unique profile, or fingerprint, for the different bowel diseases.

Both IBD and IBS present similar symptoms to each other and other bowel conditions such as colon cancer, making any definitive diagnosis very difficult. IBD -- an inflammatory autoimmune disease caused by a response of the immune system to microbes in the gut -- is usually diagnosed through endoscopic and histological testing, which are both invasive and costly and come with associated risks to the patient.

IBS -- a functional disorder of the digestive tract with no known cause -- is often diagnosed by exclusion, ruling out more serious bowel diseases.

The researchers of the study, from the University of the West of England, Bristol Royal Infirmary and the University of Liverpool, overcame these diagnostic problems by building a system that combined a gas chromatograph coupled to a metal oxide sensor with pattern recognition software.

The system was trained to recognize patterns of VOCs that were specific to known diseases. It then used this information to try and diagnose unknown samples by comparing and matching them to the database of patterns it had previously acquired.

In the researchers' study, 182 stool samples were collected from patients with IBD and IBS between October 2010 and October 2011 and stored at freezing temperatures. Control samples were also collected from healthy patients.

The results showed that patients with IBD could be distinguished from healthy controls with an accuracy of 79 per cent. Differentiating patients with IBS from healthy controls using VOCs appeared to be more difficult and could only be achieved with an accuracy of 54 per cent. The reasons, the researchers write, could be because IBS is a functional disorder as opposed to a structural disorder, so the changes in composition of VOCs in the stool samples would not be as great, producing a very similar pattern to healthy controls.

The method was able to distinguish IBD from IBS with an accuracy of 76 per cent.

Co-author of the study Sophie Shepherd, from the University of the West England, said: "Our work has demonstrated that a low-cost device based on VOC analysis could be used to potentially diagnose, and differentiate, IBS and IBD at the point of care.

"We will continue to study fecal volatiles as a way of detecting IBS, IBD and other gastrointestinal conditions and continue to develop our techniques further. If we're able to produce results that exceed current commercial methods, then our technique could be added to the growing number of medical tests that use VOC analysis as a diagnostic tool."


Story Source:

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


Journal Reference:

  1. S F Shepherd, N D McGuire, B P J de Lacy Costello, R J Ewen, D H Jayasena, K Vaughan, I Ahmed, C S Probert, N M Ratcliffe. The use of a gas chromatograph coupled to a metal oxide sensor for rapid assessment of stool samples from irritable bowel syndrome and inflammatory bowel disease patients. Journal of Breath Research, 2014; 8 (2): 026001 DOI: 10.1088/1752-7155/8/2/026001

Cite This Page:

Institute of Physics. "Stool samples provide marker for bowel disease." ScienceDaily. ScienceDaily, 27 March 2014. <www.sciencedaily.com/releases/2014/03/140327222350.htm>.
Institute of Physics. (2014, March 27). Stool samples provide marker for bowel disease. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2014/03/140327222350.htm
Institute of Physics. "Stool samples provide marker for bowel disease." ScienceDaily. www.sciencedaily.com/releases/2014/03/140327222350.htm (accessed August 20, 2014).

Share This




More Health & Medicine News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Freetown a City on Edge

Ebola-Hit Sierra Leone's Freetown a City on Edge

AFP (Aug. 19, 2014) Residents of Sierra Leone's capital voice their fears as the Ebola virus sweeps through west Africa. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com
101-Year-Old Working Man Has All The Advice You Need

101-Year-Old Working Man Has All The Advice You Need

Newsy (Aug. 19, 2014) Herman Goldman has worked at the same lighting store for almost 75 years. Find out his secrets to a happy, productive life. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com
American Ebola Patient Apparently Improving, Outbreak Is Not

American Ebola Patient Apparently Improving, Outbreak Is Not

Newsy (Aug. 19, 2014) Nancy Writebol, an American missionary who contracted Ebola, is apparently getting better, according to her husband. The outbreak, however, is not. 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:
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