HOME >> BIOLOGY >> NEWS
New biosensor rapidly detects deadly foodborne pathogen

of cells present, making it possible for today's sensors to detect their presence, but it can take as long as seven days to complete a test using conventional methods, Geng said.

Other tests rely on DNA markers, but these also can take days to process, he said. That's a problem because by the time test results come back, products may already be in food suppliers' warehouses or on store shelves, he said.

Last summer, for example, a Georgia company recalled nearly 37,000 pounds of precooked chicken products that may have been contaminated by Listeria. The chicken products had been distributed to warehouses in Georgia and Arkansas, as well as to grocery stores in Maryland and New York, when the recall was issued.

"To overcome the time delay and allow for rapid detection before foods are shipped, you need to be able to detect a lower number of the pathogen cells at the processing plant," Geng said.

The ability to detect L. monocytogenes at low levels is essential because most of the foods susceptible to Listeria contamination are ready-to-eat products, which are cooked or otherwise processed for human consumption before they make it to a grocer's shelves.

"Since precooked meats have already been processed, the bulk of microorganisms that were present in the raw product have been eliminated," Bhunia said.

"We don't expect high numbers of microorganisms in processed products, so we need to be able to detect extremely low levels of contamination."

Detection at low levels also is important for another reason, Bhunia said.

"Listeria can grow at refrigeration temperatures, so if a product has a level of Listeria low enough to evade detection when it's tested at the processor, that Listeria still can grow in the home refrigerator to a level that makes it infective to people at risk."
'"/>

Contact: Jennifer Cutraro
jcutraro@purdue.edu
765-496-2050
Purdue University
5-Oct-2004


Page: 1 2 3 4

Related biology news :

1. A biosensor layered like lasagna
2. Rochester scientists develop fast-working biosensor
3. Study demonstrates rapid diagnosis of urinary tract infections with biosensor technology
4. Indo-Pacific coral reefs disappearing more rapidly than expected
5. Dipstick test could reduce risk of food poisoning by rapidly detecting spoilage
6. Fragmentation rapidly erodes Amazonian biodiversity
7. Silver bullet: UGA researchers use laser, nanotechnology to rapidly detect viruses
8. Pheromone from mothers milk may rapidly promote learning in newborn mammals
9. Fire ant-attacking fly spreading rapidly in Texas
10. Evolving defenses rapidly suppress male killers
11. New strategy rapidly identifies cancer targets

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/16/2016)... YORK , May 16, 2016   EyeLock ... solutions, today announced the opening of an IoT Center ... to strengthen and expand the development of embedded iris ... an unprecedented level of convenience and security with unmatched ... authenticate one,s identity aside from DNA. EyeLock,s platform uses ...
(Date:5/3/2016)... 3, 2016  Neurotechnology, a provider of high-precision ... Automated Biometric Identification System (ABIS) , a complete ... MegaMatcher ABIS can process multiple complex biometric transactions ... of fingerprint, face or iris biometrics. It leverages ... and MegaMatcher Accelerator , which have been ...
(Date:4/26/2016)... and LONDON , ... Finacle, part of EdgeVerve Systems, a product subsidiary ... Onegini today announced a partnership to integrate the ...      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) ... provide their customers enhanced security to access and ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Parallel 6 , the leading software as ... Clinical Reach Virtual Patient Encounter CONSULT module which enables both audio and video ... trial team. , Using the CONSULT module, patients and physicians can schedule a face ...
(Date:6/27/2016)... BOSTON , June 27, 2016   Ginkgo ... biology to industrial engineering, was today awarded as ... a selection of the world,s most innovative companies. ... at scale for the real world in the ... organism engineers work directly with customers including Fortune ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle Marche in ... peritoneal or pleural mesothelioma. Their findings are the subject of a new article on ... biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma patients that ...
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
Breaking Biology Technology:
Cached News: