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:6/9/2016)... -- Paris Police Prefecture ... to ensure the safety of people and operations in several ... tournament Teleste, an international technology group specialised in ... that its video security solution will be utilised by ... safety across the country. The system roll-out is scheduled for ...
(Date:6/2/2016)... NEW YORK , June 2, 2016   The ... (Weather), is announcing Watson Ads, an industry-first capability in which ... advertising, by being able to ask questions via voice or ... Marketers have long ... with the consumer, that can be personal, relevant and valuable; ...
(Date:5/20/2016)... -- VoiceIt is excited to announce its new marketing ... working together, VoiceIt and VoicePass will offer an ... slightly different approaches to voice biometrics, collaboration between ... Both companies ... "This marketing and technology partnership allows VoiceIt ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf ... join the faculty of the University of North Carolina Kenan-Flagler Business School ... and entrepreneurship at UNC Kenan-Flagler, with a focus on the school’s international efforts, ...
(Date:6/27/2016)... Ginkgo Bioworks , a leading organism design company ... as one of the World Economic Forum,s Technology ... companies. Ginkgo Bioworks is engineering biology to manufacture ... the nutrition, health and consumer goods sectors. The ... Fortune 500 companies to design microbes for their ...
(Date:6/24/2016)... 2016 Epic Sciences unveiled a liquid ... to PARP inhibitors by targeting homologous recombination deficiency ... new test has already been incorporated into numerous ... types. Over 230 clinical trials are ... including PARP, ATM, ATR, DNA-PK and WEE-1. Drugs ...
(Date:6/24/2016)... , ... June 24, 2016 , ... Researchers at the ... commonly-identified miRNAs in people with peritoneal or pleural mesothelioma. Their findings are the subject ... it now. , Diagnostic biomarkers are signposts in the blood, lung fluid or ...
Breaking Biology Technology:
Cached News: