Garlic compound fights source of food-borne illness better than antibiotics
Researchers at Washington State University have found that a compound in garlic is 100 times more effective than two popular antibiotics at fighting the Campylobacter bacterium, one of the most common causes of intestinal illness. Their work was recently published in the Journal of Antimicrobial Chemotherapy.
The discovery opens the door to new treatments for raw and processed meats and food preparation surfaces.
"This work is very exciting to me because it shows that this compound has the potential to reduce disease-causing bacteria in the environment and in our food supply," says Dr. Xiaonan Lu, a postdoctoral researcher and lead author of the paper.
"This is the first step in developing or thinking about new intervention strategies," says Michael Konkel, a co-author who has been researching Campylobacter jejuni for 25 years.
"Campylobacter", says Konkel, "is simply the most common bacterial cause of food-borne illness in the United States and probably the world." Some 2.4 million Americans are affected every year, according to the Centers for Disease Control and Prevention, with symptoms including diarrhea, cramping, abdominal pain and fever. The bacteria are also responsible for triggering nearly one-third of the cases of a rare paralyzing disorder known as Guillain-Barré syndrome.
Most infections stem from eating raw or undercooked poultry or foods that have been cross-contaminated via surfaces or utensils used to prepare poultry.
Lu and his colleagues looked at the ability of the garlic-derived compound, diallyl sulfide, to kill the bacterium when it is protected by a slimy biofilm that makes it 1,000 times more resistant to antibiotics than the free floating bacterial cell. They found the compound can easily penetrate the protective biofilm and kill bacterial cells by combining with a sulfur-containing enzyme, subsequently changing the enzyme's function and effectively shutting down cell metabolism.
The researchers found the diallyl sulfide was as effective as 100 times as much of the antibiotics erythromycin and ciprofloxacin and would often work in a fraction of the time.
Two previous works published last year by Lu and WSU colleagues in Applied and Environmental Microbiology and Analytical Chemistry found diallyl sulfide and other organosulfur compounds effectively kill important foodborne pathogens, such as Listeria monocytogenes and Escherichia coli O157:H7.
Konkel cautions that the recent work is still at the basic stage, well removed from an actual application. While eating garlic is a generally healthy practice, it is unlikely to prevent Campylobacter-related food poisoning. However, "diallyl sulfide may be useful in reducing the levels of the Campylobacter in the environment and to clean industrial food processing equipment, as the bacterium is found in a biofilm in both settings."
"Diallyl sulfide could make many foods safer to eat", says Barbara Rasco, a co-author on all three recent papers and Lu's advisor for his doctorate in food science. "It can be used to clean food preparation surfaces and as a preservative in packaged foods like potato and pasta salads, coleslaw and deli meats".
"This would not only extend shelf life but it would also reduce the growth of potentially bad bacteria," she says.
Journal reference: Journal of Antimicrobial Chemotherapy
Provided by Washington State University
- Garlic doesn’t just repel vampires Aug 16, 2011 | not rated yet | 0
- Vaccinating chickens could prevent food-borne illness Mar 26, 2012 | not rated yet | 0
- Garlic oil component may form treatment to protect heart Nov 16, 2011 | not rated yet | 0
- Life-saving in the bacterial world: How Campylobacter rely on Pseudomonas to infect humans Oct 07, 2010 | not rated yet | 0
- Avoid high-risk foods, food-safety expert recommends Feb 28, 2012 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Classical and Quantum Mechanics via Lie algebras
Apr 15, 2011 I'd like to open a discussion thread for version 2 of the draft of my book ''Classical and Quantum Mechanics via Lie algebras'', available online at http://lanl.arxiv.org/abs/0810.1019 , and for the...
- More from Physics Forums - Independent Research
More news stories
(AP)—Government health officials are investigating several health problems reported with potentially contaminated medications made by a Tennessee specialty pharmacy.
Diseases, Conditions, Syndromes 10 hours ago | not rated yet | 0
(HealthDay)—Comorbid conditions often accompany alopecia areata, according to a study published online May 22 in JAMA Dermatology.
Diseases, Conditions, Syndromes 11 hours ago | not rated yet | 0
(HealthDay)—As a world-class golfer, Stacy Lewis' accomplishments are remarkable. But it was a physical challenge in her childhood that defined her ascent to the top of her sport.
Diseases, Conditions, Syndromes 12 hours ago | not rated yet | 0
Saudi Arabia said Friday it would send samples taken from animals possibly infected with a deadly SARS-like virus to the United States for testing in a bid to find the source of disease.
Diseases, Conditions, Syndromes 15 hours ago | not rated yet | 0
The World Health Organization voiced deep concern Thursday over the SARS-like virus that has killed 22 people in less than a year, saying it might potentially spread more widely between humans.
Diseases, Conditions, Syndromes 19 hours ago | 5 / 5 (1) | 0
(Medical Xpress)—A new study by researchers in the US has shown that an ancient virus can be modified to help in the fight against the simian immunodeficiency virus SIV, which is the equivalent in monkeys ...
16 hours ago | 5 / 5 (3) | 0 |
Two mutations central to the development of infantile myofibromatosis (IM)—a disorder characterized by multiple tumors involving the skin, bone, and soft tissue—may provide new therapeutic targets, according to researchers ...
10 hours ago | 3 / 5 (2) | 0 |
Women at a particular stage in their monthly menstrual cycle may be more vulnerable to some of the psychological side-effects associated with stressful experiences, according to a study from UCL.
13 hours ago | 3.7 / 5 (3) | 0 |
Biological processes are generally based on events at the molecular and cellular level. To understand what happens in the course of infections, diseases or normal bodily functions, scientists would need to ...
13 hours ago | 5 / 5 (4) | 0 |
How can healthy people who hear voices help schizophrenics? Finding the answer for this is at the centre of research conducted at the University of Bergen.
16 hours ago | 4 / 5 (2) | 2
(Medical Xpress)—The way Alzheimer's disease is portrayed by advocacy groups and the media is having undue influence on the euthanasia debate, according to a Deakin University nursing ethics professor.
17 hours ago | not rated yet | 2