BBC NEWS Americas Africa Europe Middle East South Asia Asia Pacific Arabic Spanish Russian Chinese Welsh
BBCi CATEGORIES   TV   RADIO   COMMUNICATE   WHERE I LIVE   INDEX    SEARCH 

BBC NEWS
 You are in: Health
Front Page 
World 
UK 
UK Politics 
Business 
Sci/Tech 
Health 
Background Briefings 
Medical notes 
Education 
Entertainment 
Talking Point 
In Depth 
AudioVideo 


Commonwealth Games 2002

BBC Sport

BBC Weather

SERVICES 
Monday, 5 November, 2001, 00:14 GMT
Smart bandage 'spots infection'
wound
Wounds could be checked for the presence of bacteria
A hi-tech dressing could help doctors tell the difference between types of bacteria - and send the results to a PC.

The device, developed at the University of Rochester in the US, can differentiate between two classes of bacteria - Gram-positive and Gram-negative.

This information can help doctors choose which antibiotic might be most suitable to treat it.

Normally, identifying which bug is to blame for a wound infection can take time while it is cultured in a laboratory.

The team at Rochester are hopeful that they can improve their silicon sensor - the size of a pin-head, to identify different types of bacteria, such as salmonella, listeria and E.coli.


We can now get the same information immediately, at home or in the doctor's office, and we're working on similar ways to detect dozens of other potentially harmful bacteria
Professor Ben Miller, Rochester University
Professor Ben Miller, from the University, said the sensor represented the first major improvement in testing for Gram-positive and -negative bacteria since a laboratory technique first used in 1884.

He said: "It's amazing to me that we're still using a procedure that's effectively out of the Stone Age.

"We can now get the same information immediately, at home or in the doctor's office, and we're working on similar ways to detect dozens of other potentially harmful bacteria."

The "smart dressing" picks out a molecule called lipid A which is found on the surface of the cells of Gram-negative bacteria.

The researchers have created another molecule which binds with lipid A to make a subtle colour change.

It is hoped that once the test is fine-tuned, it could be read by a computer, so could be used by the patient at home to monitor cuts and wounds for signs that dangerous bacteria were invading.

'Step forward'

Alice Pentland, who runs the department of dermatology at Rochester, said: "This is an important step in changing the way preventive medicine is perceived and practiced.

"This research can put a very simple and accurate tool into the hands of anyone, giving them more control over their own health than ever before."

A spokesman for the Public Health Laboratory Service said that the present invention would not necessarily be able to pick out the good guys from the bad guys among the bacteria.

He said: "In order to inform treatment, one would need to be able to tell whether the bacteria are pathogens - that is, capable of causing disease - or simply harmless bacteria.

"If pathogens are present, it would also be important to know whether they are actually in a place where they might cause disease as opposed to simply being present but not posing a risk of infection."

The team from Rochester says there has also been interest in the technology from food packaging manufacturers - so that it could give a colour-change warning if meat had gone rotten.

Plastic cups could include the sensor so that water could be checked for purity.

See also:

17 Aug 00 | Health
TB 'toughness gene' uncovered
03 Apr 01 | Health
Tea run 'spread deadly bugs'
13 Apr 01 | Health
Superbug 'beating' new antibiotic
16 May 01 | Health
Speedy 'burger bug' test
11 Jun 01 | Health
Dirty hands 'poison thousands'
22 Jun 01 | Health
More accurate TB test unveiled
Internet links:


The BBC is not responsible for the content of external internet sites

Links to more Health stories are at the foot of the page.


E-mail this story to a friend

Links to more Health stories