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Garlic ingredient fights food poisoning

Date
Garlic  ... the discovery is said to open the door to new treatments for raw and processed meats, and food preparation surfaces.

Garlic ... the discovery is said to open the door to new treatments for raw and processed meats, and food preparation surfaces. Photo: Tamara Dean

A garlic ingredient is 100 times more powerful than two popular antibiotics at fighting one of the leading causes of food poisoning, say scientists.

The compound, diallyl sulphide, is able to pierce a protective "biofilm" employed by the food bug that makes it hard to destroy.

Tests showed diallyl sulphide was as effective as 100 times bigger doses of the antibiotics erythromycin and ciprofloxacin.

It was also able to work in a fraction of the time taken by the drugs.

The discovery is said to open the door to new treatments for raw and processed meats, and food preparation surfaces.

"This is the first step in developing or thinking about new intervention strategies," said researcher Dr Michael Konkel, from Washington State University in the US, who has been investigating Campylobacter for 25 years.

"Campylobacter is simply the most common bacterial cause of food-borne illness in the United States and probably the world."

Symptoms of Campylobacter infection include diarrhoea, cramping, abdominal pain and fever.

The bacteria also trigger nearly a third of cases of a rare paralysing disorder called Guillain-Barre syndrome.

Most Campylobacter infections stem from eating raw or undercooked poultry or foods that have been cross-contaminated via dirty surfaces and utensils.

The research is published in the Journal of Antimicrobial Chemotherapy.

The Washington scientists looked at diallyl sulphide's ability to kill Campylobacter bacteria when they join together to form a slimy biofilm. This makes the bugs 1000 times more resistant to antibiotics than free-floating bacterial cells.

The compound easily penetrated the protective film to kill the microbes by targeting a metabolic enzyme.

Two previous studies published last year showed that the garlic compound was also effective against other food-borne bugs, including Listeria monocytogenes and Escherichia coli O157.

Dr Konkel pointed out that while eating garlic was generally healthy, it was unlikely to prevent Campylobacter food poisoning.

However, he added: "Diallyl sulphide 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."

Colleague Dr Barbara Rasco, another member of the Washington State University team, said: "Diallyl sulphide could make many foods safer to eat.

"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."

PA

47 comments

  • I would be interested to know whether cooked garlic has the same qualities.

    Commenter
    Bec
    Location
    Sydney
    Date and time
    May 03, 2012, 11:24AM
    • Health wise cooked garlic is not as effective as raw garlic

      Commenter
      AA
      Date and time
      May 03, 2012, 1:59PM
    • Heat (cooking etc.) denatures the substrate which enzymes use to bind. This essentially makes the food worthless and is a primary reason why raw food should be taken on board as the foundation of a healthy diet.

      Commenter
      Healthybaby
      Location
      Melbourne
      Date and time
      May 03, 2012, 2:21PM
    • @Healthybaby not entirely accurate. pickled cabbage, cooked pumpkin and carrots are just as effective as their raw counterparts(excludes juicing)

      Commenter
      AA
      Date and time
      May 03, 2012, 2:54PM
    • Cooked tomato is better than raw apparently..

      Commenter
      euro
      Location
      Melbourne
      Date and time
      May 04, 2012, 12:36AM
    • @Healthybaby.
      Cooked food is worthless ?? Gee... Thanks for nothing, Grandma ;(

      Commenter
      Kel
      Date and time
      May 04, 2012, 7:11AM
    • Well I researched further and it appears there is a solution regarding cooking garlic: 'A report by Science Daily explains that if raw garlic is first chopped and then allowed to sit for 45 minutes, it can produce allicin.'

      Read more: http://www.livestrong.com/article/340975-what-are-the-health-benefits-of-raw-garlic-vs-cooked-garlic/#ixzz1trcSXhkw

      Commenter
      Bec
      Date and time
      May 04, 2012, 12:24PM
  • Knew the wonders of garlic already. Most nights before bed is preceeded by a shot of my premade 'tonic' gingar, garlic and sage soaked in boiling water, nothing worse then a sniffle after a big night out, ruining my body ever since.

    Commenter
    Smelly Breath
    Location
    Fremantle
    Date and time
    May 03, 2012, 11:31AM
    • @Smelly breath, what parts what to which? :-)

      Commenter
      Captain K
      Location
      Melbourne
      Date and time
      May 03, 2012, 4:10PM
    • Clearly. You sleep alone.

      Commenter
      Sniff
      Location
      In the Bedroom
      Date and time
      May 03, 2012, 4:29PM

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