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:3/24/2017)... The Controller General of Immigration from Maldives Mr. Mohamed ... received the prestigious international IAIR Award for the most innovative high security ... ... Maldives Immigration Controller General, ... picture on the right) have received the IAIR award for the "Most ...
(Date:3/23/2017)... -- Research and Markets has announced the addition of ... Industry Forecast to 2025" report to their offering. ... The Global Vehicle Anti-Theft ... 8.8% over the next decade to reach approximately $14.21 billion by ... and forecasts for all the given segments on global as well ...
(Date:3/22/2017)... March 21, 2017 Vigilant Solutions , ... law enforcement agencies, announced today the appointment of retired ... of public safety business development. Mr. Sheridan ... experience, including a focus on the aviation transportation sector, ... recent position, Mr. Sheridan served as the Aviation Liaison ...
Breaking Biology News(10 mins):
(Date:8/15/2017)... spending the past two years building a state-of-the-art technology which consolidates ... this platform to healthcare stakeholders (hospitals, foundations, biopharma companies etc.) who ... vis a vis their members, under their own brand. Three recent ... ... ...
(Date:8/15/2017)... ... 15, 2017 , ... Any expert in stem cell research or stem cell ... than half a century. Despite their essential roles in human health and regenerative ... molecular tags developed for this purpose also tag other, more abundant, non-stem tissue cells ...
(Date:8/15/2017)... , ... August 15, 2017 , ... ... shopping cart. Now mobile responsive, the new website makes it easy to navigate ... in between. Users can now find detailed product information, educational industry content and ...
(Date:8/11/2017)... 11, 2017  Market researcher Kalorama Information ... article regarding the telemedicine market.  The telemedicine ... Information.  The article, "Heart and Asthma ...  used information from Kalorama Information,s Remote Patient ... Market  (Sleep, Diabetes, Vital Signs /EKG ...
Breaking Biology Technology: