Navigation Links
E. coli, salmonella may lurk in unwashable places in produce
Date:8/15/2011

WEST LAFAYETTE, Ind. - Sanitizing the outside of produce may not be enough to remove harmful food pathogens, according to a Purdue University study that demonstrated that Salmonella and E. coli can live inside plant tissues.

E. coli 0157:H7 was present in tissues of mung bean sprouts and Salmonella in peanut seedlings after the plants' seeds were contaminated with the pathogens prior to planting. Amanda Deering, a postdoctoral researcher in food science, said seeds could be contaminated in such a manner before or after planting through tainted soil or water.

"The pathogens were in every major tissue, including the tissue that transports nutrients in plants," said Deering, whose results were published in separate papers in the Journal of Food Protection and Food Research International.

Deering and Robert Pruitt, a professor of botany and plant pathology, said finding pathogens inside plants has been challenging because tests require slicing off pieces of the plants, which can move the bacteria from the outside to the inside or vice versa. It becomes difficult to know where a pathogen might have been before the plant was cut.

"The results are often imprecise because the methods allow bacteria to move," said Pruitt, a co-author of the findings.

Deering used a fixative to freeze the location of the bacteria in the plant tissues before slicing samples. Antibodies labeled with fluorescent dye were used to detect the pathogens, a process called immunocytochemistry.

"This shows us as close to what was in the plant when it was living as possible," Deering said. "The number of bacteria increased and persisted at a high level for at least 12 days, the length of the studies."

Deering said she was able to count hundreds of bacteria in almost every type of tissue.

Proper sanitization would eliminate Salmonella and E. coli from the surface of foods, but not inner tissues, Deering and Pruitt said. Cooking those foods to temperatures known to kill the pathogens would eliminate them from inner tissues.


'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

Related biology news :

1. Salmonella stays deadly with a beta version of cell behavior
2. New target found for nitric oxides attack on salmonella bacteria
3. Bacterium Salmonella enterica regulates virulence according to iron levels found in its surroundings
4. Salmonella utilize multiple modes of infection
5. Zooming in on the weapons of Salmonella
6. MU scientist develops salmonella test that makes food safer, reduce recalls
7. Mechanism uncovered behind Salmonella virulence and drug susceptibility
8. Faster Salmonella detection now possible with new technique
9. Probiotic without effect against Salmonella
10. Hygienic Lab at U. Iowa first to confirm salmonella in nationwide outbreak
11. Yale researchers uncover secrets of salmonellas stealth attack
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
E. coli, salmonella may lurk in unwashable places in produce
(Date:3/15/2016)... ALBANY, New York , March 15, 2016 ... a new market report published by Transparency Market Research "Digital ... Growth, Trends and Forecast 2015 - 2023," the global digital ... at US$ 731.9 Mn in 2014 and is forecast to ... to 2023. Growth of micro, small and medium enterprises (MSMEs) ...
(Date:3/14/2016)... Allemagne, March 14, 2016 ... - --> - Renvoi : image disponible ... --> --> DERMALOG, ... fournit de nouveaux lecteurs d,empreintes digitales pour l,enregistrement ... DERMALOG sera utilisé pour produire des cartes d,identité ...
(Date:3/10/2016)... India , March 10, 2016 ... a new market research report "Identity and Access Management ... & Audit, Compliance, and Governance), by Organization Size, by ... to 2020", published by MarketsandMarkets, The market is estimated ... USD 12.78 Billion by 2020, at a Compound Annual ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... CA (PRWEB) , ... May 03, 2016 , ... ... Playbook™ enterprise talent development, skill-building and compliance training platform on mobile devices, ... training course: Overview of Regulatory Requirements for Medical Devices. The course is essential ...
(Date:5/3/2016)... ... May 03, 2016 , ... ... CEO 2016 on May 31st and June 1st at The Four Seasons Hotel ... executives in the life sciences, offering exclusive access to key decision makers who ...
(Date:5/3/2016)... ... May 03, 2016 , ... Kerafast Inc., developers ... from laboratories across the globe, today announced the availability of a Zika virus ... research toward treatment and prevention measures for the Zika virus, the virus’s geographical ...
(Date:5/3/2016)... 3, 2016 - And Other ... Producers of Those Competitor Biologics  - Biosimilar ... and Prospects ,  Who are the most ... what are their sales potentials? Discover, in our updated ... trends, opportunities and revenue forecasting. Visiongain,s ...
Breaking Biology Technology: