Navigation Links
Lettuce's Roots Lure Salmonella
Date:10/11/2007

A sugar-like substance attracts the dangerous pathogen, scientists say

THURSDAY, Oct. 11 (HealthDay News) -- Salmonella, a bacteria that causes tens of thousands of cases of foodborne illness each year, may be especially attracted to lettuce by the prospect of something sweet.

The bug is apparently enticed by a sugar-like substance lying in the leafy green's roots, say a team of Dutch scientists.

They believe the results may help one day find new ways to prevent infection with the potentially deadly germ, but others are not so sure.

"It's a laboratory study and it can't be generalized to anything else," said Dr. Douglas L. Hurley, a professor of internal medicine at the Texas A&M Health Science Center College of Medicine and an infectious disease doctor at Scott & White. "It can't be generalized to lettuce growing in a field by a long shot."

"The great majority of human outbreaks of salmonellosis come from chicken or eggs, so the question is what kind of public health import would this have," added Philip Alcabes, an epidemiologist and an associate professor at the School of Health Sciences of Hunter College, City University of New York in New York City.

Indeed, salmonella infection usually comes from eating contaminated ground beef, eggs and pork and, increasingly, poultry, rather than produce.

Some 40,000 cases of salmonellosis are reported in the United States each year. However, because milder cases are not diagnosed or reported, the U.S. Centers for Disease Control and Prevention estimate that the actual number of infections may be 30 or more times greater. Some 600 people die each year after being infected with salmonella. Infection can cause diarrhea, including bloody diarrhea, in humans.

But foodborne illness in general, especially from E. coli, another bacteria, is being increasingly traced back to produce. And in March, the U.S. Food and Drug Administration issued voluntary guidelines for food industry processors to minimize contamination of ready-to-eat produce.

Reporting online Oct. 11 in The International Society for Microbial Ecology Journal, a team at Wageningen University in The Netherlands maintain that salmonella infections from produce are also becoming increasingly common. In these cases, infection can come from poor hygiene among workers or contamination via soil or water tainted with animal manure.

In this paper, the researchers reveal that salmonella bacteria move towards the roots of the lettuce, apparently attracted by a sugar-like carbon source located there. When the bacteria gets close, the molecule triggers a genetic signal which, in turn, triggers bacterial reproduction.

While government and industry are actively looking for ways to prevent salmonella infection in the field and during the processing stages, there are ways people can protect themselves at home:

  • Make sure ground beef and other meats, as well as eggs, are well-cooked before you eat them.
  • Wash raw fruits and vegetables with soap. Pay particular attention to leafy greens as there are lots of crevasses and cracks where bacteria can hide.
  • Don't chop vegetables on the same block where you just made beef hamburgers or prepared other meat. Keep raw meat separate from ready-to-eat foods.
  • Refrigerate leftovers promptly.
  • Avoid bruised produce such as tomatoes.
  • Make sure all cooking utensils including meat thermometers and cutting boards are thoroughly cleaned with soap and hot water after you've handled them.
  • Wash your hands regularly with soap and hot water.
  • Drink only pasteurized milk, juice or cider.

More information

For more information on salmonella, visit the U.S. Centers for Disease Control and Prevention.



SOURCES: Philip Alcabes, Ph.D., epidemiologist and associate professor, School of Health Sciences, Hunter College, City University of New York, New York City; Douglas L. Hurley, M.D., professor, internal medicine, Texas A&M Health Science Center College of Medicine and infectious disease specialist, Scott & White, College Station; Oct. 11, 2007, ISME Journal online


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Sleepwalking has genetic roots
2. Roots of polycystic ovarian syndrome traced to mother’s wom
3. Mad Cow Disease Has Roots Traceable To Man
4. Parkinsons Disease Has Genetic Roots
5. Australian beauty with roots in India open to acting in Bollywood
6. Scientists Trace the Roots of the Worlds Healthiest Wines
7. Hypertension Has Its Roots in Childhood
8. Ranbaxy Labs Extends Roots in South Africa
9. Now, Its Possible to Trace Marijuana to Its Roots
10. Roma tomatoes the culprits for salmonella infection
11. Salmonella Poisoned Frozen Pasta Hit Six
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... First ... United States, named Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell ... facility Medical Director of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive ...
(Date:6/25/2016)... ... ... Conventional wisdom preaches the benefits of moderation, whether it’s a matter of ... too high can result in disappointment, perhaps even self-loathing. However, those who set the ... Research from PsychTests.com reveals that behind the tendency to set low expectations ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, ... at his family verbally and physically. , “When something upset him, he couldn’t control his ... it. He would throw rocks at my other children and say he was going to ...
(Date:6/24/2016)... ... 24, 2016 , ... Comfort Keepers® of San Diego, CA is excited to ... Recovery® program to drive cancer patients to and from their cancer treatments. Comfort ... quality of life and ongoing independence. Getting to and from medical treatments is ...
(Date:6/24/2016)... ... June 24, 2016 , ... The ... recognize Dr. Barry M. Weintraub as a prominent plastic surgeon and the network’s ... the world, and the most handsome men, look naturally attractive. Plastic surgery should ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Research and Markets has announced the addition of ... Forecast to 2022" report to their offering. ... date financial data derived from varied research sources to present ... impact on the market during the next five years, including ... sub markets, regional and country level analysis. The report provides ...
(Date:6/23/2016)... , June 23, 2016 Bracket , ... launch its next generation clinical outcomes platform, Bracket eCOA (SM) ... held on June 26 – 30, 2016 in ... first electronic Clinical Outcome Assessment product of its kind to ... #715. Bracket eCOA 6.0 is a flexible platform ...
(Date:6/23/2016)... and BOGOTA, Colombia , June 23, 2016  Astellas today announced the establishment of ... Farma Brasil as the company,s second affiliate in Latin America . ... ... Manager of Astellas Farma Colombia ... ...
Breaking Medicine Technology: