Preventing foodborne illness, naturally—with cinnamon

July 17, 2014
Cinnamomum cassia oil has been shown to kill certain strains of E. coli bacteria. Credit: Robert Hubner, WSU Photo Services

Seeking ways to prevent some of the most serious foodborne illnesses caused by pathogenic bacteria, two Washington State University scientists have found promise in an ancient but common cooking spice: cinnamon.

Recent findings published in Food Control journal online suggest Cinnamomum cassia oil can work effectively as a natural antibacterial agent in the . The study results add to a body of knowledge that will help improve food safety and reduce or eliminate cases of and related deaths.

In the study, the essential oil killed several strains of Shiga toxin-producing Escherichia coli (E. coli), known to the U.S. Centers for Disease Control and Prevention as "non-O157 STEC." The study looked at the top six strains of non-O157 STEC, said co-author Lina Sheng, a graduate student in the School of Food Science.

The cinnamon cassia oil is effective in low concentrations, she said – about 10 drops diluted in a liter of water killed the bacteria within 24 hours.

Demand for natural food additives

Rising health concerns about chemical additives have strengthened demand for natural food additives, said co-author Meijun Zhu, an assistant professor in the School of Food Science.

This image depicts researchers at the WSU School of Food Science. Credit: Robert Hubner, WSU Photo Services

"Our focus is on exploring plant-derived natural bioactive compounds as antimicrobials to control foodborne pathogens, in order to ensure safety of fresh produce," she said.

Sheng said about 110,000 cases of illness are caused annually by non-O157 STEC.

The U.S. Department of Agriculture Food Safety and Inspection Service has a "zero tolerance" policy for the CDC top six non-O157 STECs in raw ground beef and trimmings, indicating any raw non-intact beef products containing these pathogens will be considered adulterated. This has led Zhu and Sheng to include the beef industry in the large-scale application of their findings on cinnamon.

"The oil can be incorporated into films and coatings for packaging both meat and fresh produce," Sheng said. "It can also be added into the washing step of meat, fruits or vegetables to eliminate microorganisms."

Cassia cinnamon is produced primarily in Indonesia and has a stronger smell than the other common cinnamon variety, Ceylon.

In addition to Cinnamomum cassia oil, Sheng plans to take a look at another natural source to kill bacteria. She and her coworkers will study the potential of dandelions to inhibit bacteria related to bovine mastitis, an infection in the mammary glands of dairy cows.

Explore further: Levels of coumarin in cassia cinnamon vary greatly even in bark from the same tree

More information: The article, "Inhibitory effect of Cinnamomum cassia oil on non-O157 Shiga toxin-producing Escherichia coli," will be published in the print version of Food Control in December 2014.

Related Stories

Study on coumarin in cinnamon and cinnamon-based products

May 8, 2013

Many kinds of cinnamon, cinnamon-flavored foods, beverages and food supplements in the United States use a form of the spice that contains high levels of a natural substance that may cause liver damage in some sensitive people, ...

Recommended for you

Zika virus may persist in the vagina days after infection

August 25, 2016

The Zika virus reproduces in the vaginal tissue of pregnant mice several days after infection, according to a study by Yale researchers. From the genitals, the virus spreads and infects the fetal brain, impairing fetal development. ...

In sub-Saharan Africa, cancer can be an infectious disease

August 26, 2016

In 1963, Irish surgeon Denis Parson Burkitt airmailed samples of an unusual jaw tumor found in Ugandan children to his colleague, Anthony Epstein, at Middlesex Hospital in London. Epstein, an expert in chicken viruses and ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.