Featured Research

from universities, journals, and other organizations

Foodborne Outbreaks From Leafy Greens On Rise

Date:
March 19, 2008
Source:
American Society for Microbiology
Summary:
Over the past 35 years the proportion of foodborne outbreaks linked to the consumption of leafy green vegetables has substantially increased and that increase can not be completely attributed to Americans eating more salads according to new research.

Over the past 35 years the proportion of foodborne outbreaks linked to the consumption of leafy green vegetables has substantially increased and that increase can not be completely attributed to Americans eating more salads according to research presented March 17 at the 2008 International Conference on Emerging Infectious Diseases in Atlanta, Georgia.

Related Articles


"Consumption of leafy greens has increased over the years, but it does not completely explain the increase in the proportion of foodborne outbreaks due to leafy green consumption," says Michael Lynch of the Centers for Disease Control and Prevention (CDC), a researcher on the study.

Prompted by the high profile E. coli outbreaks associated with spinach and lettuce in 2006, Lynch and his colleagues decided to investigate the incidence of foodborne disease outbreaks associated with leafy greens in the past. Using data from the CDC foodborne disease outbreak surveillance system they analyzed over 10,000 foodborne disease outbreaks reported between 1973 and 2006.

For the entire period, approximately 5% of all foodborne outbreaks were linked to leafy greens. Most of these (60%) were caused by norovirus, but some were caused by salmonella (10%) and E. coli (9%).

"Given recent experiences that was not a total surprise. What was interesting was when we compared the numbers to consumption data," says Lynch.

Using per capita availability of leafy greens in the United States as a proxy for leafy green consumption, the researchers compared per capita consumption of leafy greens with the proportion of foodborne outbreaks caused by leafy green consumption.

"During the 1986-1995 period U.S. leafy green consumption increased 17% from the previous decade. During the same period, the proportion of all foodborne disease outbreaks due to leafy greens increased 60%. Likewise during 1996-2005 leafy green consumption increased 9% and leafy green-associated outbreaks increased 39%," says Lynch.

Further investigation is necessary in order to determine other factors that may help explain the increase, says Lynch. While many foodborne outbreaks can be traced to a problem in food preparation, he notes that some outbreaks are fairly widespread, suggesting that contamination took place early in the production process, either on the farm or the processing plant.

"The proportion of outbreaks due to leafy greens has increased beyond what can be explained by increased consumption. Contamination can occur anywhere along the chain from the farm to the table. Efforts by local, state and federal agencies to control leafy green outbreaks should span from the point of harvest to the point of preparation," says Lynch.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Cite This Page:

American Society for Microbiology. "Foodborne Outbreaks From Leafy Greens On Rise." ScienceDaily. ScienceDaily, 19 March 2008. <www.sciencedaily.com/releases/2008/03/080317164356.htm>.
American Society for Microbiology. (2008, March 19). Foodborne Outbreaks From Leafy Greens On Rise. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2008/03/080317164356.htm
American Society for Microbiology. "Foodborne Outbreaks From Leafy Greens On Rise." ScienceDaily. www.sciencedaily.com/releases/2008/03/080317164356.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Raw: Paralyzed Marine Walks With Robotic Braces

Raw: Paralyzed Marine Walks With Robotic Braces

AP (Nov. 21, 2014) Marine Corps officials say a special operations officer left paralyzed by a sniper's bullet in Afghanistan walked using robotic leg braces in a ceremony to award him a Bronze Star. (Nov. 21) Video provided by AP
Powered by NewsLook.com
Milestone Birthdays Can Bring Existential Crisis, Study Says

Milestone Birthdays Can Bring Existential Crisis, Study Says

Newsy (Nov. 21, 2014) Researchers find that as people approach new decades in their lives they make bigger life decisions. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins