Toward safer foods for human consumption with anthrax protection

Aug 26, 2010
Researchers are reporting a food additive that may protect some foods from contamination with anthrax spores (above). Credit: Centers for Disease Control and Prevention

An antibacterial enzyme found in human tears and other body fluids could be applied to certain foods for protection against intentional contamination with anthrax, scientists reported today at the 240th National Meeting of the American Chemical Society (ACS).

"Data from this study could be used in developing safer foods for human consumption," said Saeed A. Khan, Ph.D. "The data from our study shows that lysozyme application has the potential to eliminate producing bacteria in processed foods."

Khan and colleagues knew from almost a century of lysozyme research that the enzyme kills certain bacteria. It does so by destroying bacteria cell walls, the rigid outer shell that provides a protective coating. Lysozyme was discovered in 1922 by Alexander Fleming during the search for antibiotics that eventually led to penicillin. A drop of mucus (which contains lysozyme) from Fleming's nose fell into a culture dish of bacteria. Much to his surprise, it killed the bacteria. Since then, scientists have shown that lysozyme has far-reaching roles in protecting against disease-causing . Found in many , it sometimes is called "the body's own antibiotic." In , for instance, lysozyme protects infants from certain infections. The whites of hens' eggs have large amounts of the enzyme to protect the developing chick from infections.

Until the new study that was published by Dr. Khan and his colleagues, however, it was not known if lysozyme could also be effective against , the microbe that causes anthrax. Khan and colleagues, who are with the National Center for Toxicological Research in Jefferson, Ark., used a surrogate that is considered as a stand-in for anthrax in their research because it behaves in more or less similar fashion as the actual anthrax strain, except that it does not cause the disease. They studied the spore's survival in hens' egg white, and found that the lysozyme in egg white was very effective in killing anthrax spores. Lysozyme also showed some activity in killing spores added to ground beef and milk.

"Based on our results, it looks like that lysozyme could be used to either slow down or prevent the growth of an avirulent form of the bacterium Bacillus anthracis that causes anthrax," Khan said. "More research is needed on other types of foods, including ground beef, milk, fruit juices, and vegetables."

Explore further: Brown versus white bread: the battle for a fibre-rich diet

add to favorites email to friend print save as pdf

Related Stories

Unmasking anthrax for immune destruction

Apr 30, 2010

Anthrax-causing bacteria can be engineered to shed their invisibility cloaks, making it easier for the immune system to eradicate it, according to a new study published in Microbiology. The work could lead t ...

Recommended for you

New material makes water and oil roll off

18 hours ago

Car finish, to which no dirt particles adhere, house fronts, from which graffiti paints roll off, and shoes that remain clean on muddy paths – the material "fluoropore" might make all this possible. Both ...

User comments : 0

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.