Biosensor detects sexually transmitted disease in a jiffyMay 11th, 2009 - 1:24 pm ICT by IANS
London, May 11 (IANS) A new biosensor can promptly detect the presence of Candida albicans yeast, usually found in a person infected with a sexually transmitted disease.
The Candida samples, obtained from blood, serum or vaginal secretions, are placed directly on the biosensor, where antigens and antibodies interact to change the electric current of the device.
Candida albicans fungus exists naturally in the skin, mouth, the mucous membranes lining the digestive tract, and the respiratory and genitourinary systems.
This yeast can cause anything from simple mycosis of the skin to complicated cases of candidiasis. It is much more commonly found in patients suffering from immunodeficiency, tumours, diabetes and lymphomas, among other diseases.
“Thanks to the extraordinary properties of the carbon nanotubes, the fungus detection process is direct, fast, and does not require the use of any marker,” said senior study author Raquel A. Villamizar of Spain’s Universidad Rovira i Virgili.
Conventional diagnosis of Candida was a highly time consuming process, carried out using microbial cultures, serological tests, PCR molecular biology techniques (polymerase chain reactions used to amplify DNA), or immunoassays such as ELISA (Enzyme Linked Inmunoabsorbent Assay).
These techniques sometimes give rise to false positives and negatives. ELISA also requires the use of markers (compounds that must be added to detect the presence of yeast by fluorescence and other techniques), said a Plataforma SINC release.
These findings were published recently in Sensors and Actuators B: Chemical.
- Breakthrough can boost lab test's sensitivity - Jun 04, 2012
- Pumpkin skin may scare away disease-causing germs - Oct 29, 2009
- Total cure for fungal infections found - Aug 01, 2009
- Novel biosensor can detect typhoid bacteria instantly - Sep 09, 2009
- Bacteria fighting fungal infections - May 02, 2010
- Novel drugs more lethal against fungal infections - Dec 26, 2009
- Fungal pathogen inside us can be bisexual - Aug 13, 2009
- How to mount a multi-layered attack on fungal infections - Sep 08, 2009
- Baker's yeast protects against fatal diseases - Aug 10, 2011
- Coconut oil combats tooth decay - Sep 03, 2012
- Body's own cells to keep us healthy in the future - Dec 15, 2010
- Tea tree oil, silver act like antiseptics when combined - Mar 30, 2009
- New tool that can quickly identify dangerous viruses developed - Nov 23, 2010
- Carbon nanotubes make up ultrasensitive biosensor to identify proteins - Jun 28, 2010
- World's first known cannibals ate each other for extra nutrition - Aug 27, 2010
Tags: antigens and antibodies, blood serum, candida albicans, candidiasis, carbon nanotubes, digestive tract, electric current, extraordinary properties, false positives, genitourinary systems, microbial cultures, molecular biology techniques, mucous membranes, mycosis, polymerase chain reactions, sensors and actuators b, serological tests, study author, vaginal secretions, villamizar