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:
TAG: New biosensor rapidly detects deadly foodborne pathogen

(Date:8/29/2014)... Researchers at UC Davis have made some surprising ... infection. Studying simian immunodeficiency virus (SIV), the team ... Paneth cells are early responders to viral invasion ... producing a cytokine called interleukin-1 beta (IL-1β). ... IL-1β causes breakdown of the gut epithelium that ...
(Date:8/29/2014)... at the Barshop Institute for Longevity and Aging Studies, ... Health Science Center at San Antonio, have found another ... rodent, the naked mole rat. , They reported ... rats protects and alters the activity of the proteasome, ... The factor also protects proteasome function in human, mouse ...
(Date:8/29/2014)... has been known about what genetic changes transform wild ... one of whom is a University of Montana assistant ... controlling the development of the brain and the nervous ... was published Aug. 28 in Science and ... at http://www.sciencemag.org/ ., The domestication of animals and ...
Breaking Biology News(10 mins):The early cost of HIV 2Factor in naked mole rat's cells enhances protein integrity 2New research reveals how wild rabbits were genetically transformed into tame rabbits 2New research reveals how wild rabbits were genetically transformed into tame rabbits 3
(Date:8/29/2014)... Inc. (NYSE MKT: PFNX), a clinical-stage biotechnology company ... to manufacture proteins including biosimilar therapeutics, today provided ... the second quarter ended June 30, 2014. ... public offering, we have the capital to continue ... our proprietary protein expression platform," stated Bertrand C. ...
(Date:8/29/2014)... electrons, but one of the most promising technologies for ... on light (photons) instead of electrons. First, it is ... single photons and control their direction. Researchers around the ... this control, but now scientists at the Niels Bohr ... photons emitted one at a time and in a ...
(Date:8/29/2014)... 29, 2014 The global companion ... in 2019. It is expected to grow at ... and was valued at $1.8 billion in 2013, ... Market Research. , For more information regarding analysis ... , The research report, titled “Companion Diagnostics Market ...
(Date:8/29/2014)... August 29, 2014 According to a new ... the global orthobiologics market was valued at USD 3,754.6 million ... USD 5,519.9million in 2019at a CAGR of 5.9% from 2013 ... years and above is afflicted by bone and joint disorders, ... year 2020. This has and will continue to increase the ...
Breaking Biology Technology:Pfenex Reports Second Quarter 2014 Results and Provides Business Update 2Pfenex Reports Second Quarter 2014 Results and Provides Business Update 3Pfenex Reports Second Quarter 2014 Results and Provides Business Update 4Pfenex Reports Second Quarter 2014 Results and Provides Business Update 5Pfenex Reports Second Quarter 2014 Results and Provides Business Update 6Pfenex Reports Second Quarter 2014 Results and Provides Business Update 7Pfenex Reports Second Quarter 2014 Results and Provides Business Update 8Breakthrough in light sources for new quantum technology 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3
Cached News: