About Careers Internship MedBlog Contact us
Medindia LOGIN REGISTER
Advertisement

Biosensor That can Detect Typhoid Bacteria Instantly Developed

by Rajashri on September 11, 2009 at 8:42 PM
Font : A-A+

 Biosensor That can Detect Typhoid Bacteria Instantly Developed

A novel biosensor that can instantly detect Salmonella typhi, the bacteria that causes typhoid fever, has been developed by scientists from Rovira i Virgili University (URV) in Tarragona.

The technique uses carbon nanotubes and synthetic DNA fragments that activate an electric signal when they link up with the pathogen.

Advertisement

"We have developed a new biosensor that can detect extremely low concentrations of bacteria immediately, easily and reliably", F. Xavier Rius, lead author of the study and a professor in the Chemometrics, Qualimetrics and Nanosensors research group in the Analytical Chemistry and Organic Chemistry Department of the URV, told SINC.

The new biosensor functions using a method, which involves carbon nanotubes with inbuilt aptamers providing electrochemical readings.

According to the researchers, the aptamers are small fragments of artificial DNA or RNA designed to attach themselves specifically to a particular molecule, cell or micro organism, in this case Salmonella.
Advertisement

If the bacteria are not present, the aptamers remain on the walls of the carbon nanotubes.

However, if they detect bacteria, they become activated and stick to it, and the carbon nanotubes generate an electric signal that is picked up by a simple potentiometer connected to the biosensor.

"The presence of the bacteria sparks a change in the interaction between the aptamers and the nanotubes, which takes place in a few seconds and creates an increase in the voltage of the electrode", said Ruis, who led the research along with researcher Jordi Riu.

"This technique means small quantities of micro organisms can be detected simply and practically in real time, just the same as measuring the pH of water", Ruis added.

The study appears in the scientific journal Angewandte Chemie International Edition.

Source: ANI
RAS
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
What's New on Medindia
Quiz on Low-Calorie Diet for Diabetes
World Heart Day in 2022- Use Heart for Every Heart
Anemia among Indian Women and Children Remains a Cause of Concern- National Family Health Survey-5
View all
Recommended Reading
News Archive
Date
Category
Advertisement
News Category

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Typhoid and Paratyphoid Enteric Fevers Salmonellosis Shigellosis MRSA - The Super Bug Fever Food Safety for Health Antibiotics 

Most Popular on Medindia

Selfie Addiction Calculator How to Reduce School Bag Weight - Simple Tips Noscaphene (Noscapine) Daily Calorie Requirements Accident and Trauma Care Drug Side Effects Calculator Nutam (400mg) (Piracetam) Sanatogen Sinopril (2mg) (Lacidipine) Hearing Loss Calculator
This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use
×

Biosensor That can Detect Typhoid Bacteria Instantly Developed Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests