The Soil Association is calling on the Government to issue guidelines that will limit the veterinary use of the most modern penicillin-type antibiotics, to prevent the spread of a serious new superbug.

Recently released minutes of a Government committee reveal that Ministers have been briefed about the emergence on a British dairy farm of a mutant strain of antibiotic-resistant E. coli which causes life-threatening cases of food poisoning, including hemorrhagic colitis and haemolytic uraemic syndrome.

The bug, known as E. coli O26 is a vera-toxin producing E. coli (VTEC), similar to the infamous E. coli O157. According to the Soil Association, what makes the discovery of this variant so significant is that this is the first time in the UK, and only the third time in the world, that VTEC E. coli has been found with an enhanced type of antibiotic resistance known as extended-spectrum beta-lactamase (ESBL), which makes it resistant to almost all antibiotics. ESBL resistance has previously been found on 57 UK farms, but until now only in strains of E. coli that cause urinary tract infections and blood poisoning.

Although antibiotics are not recommended for the treatment of VTEC E. coli, scientists warn that the emergence of resistance is undesirable because these resistant bacteria are encouraged every time certain antibiotics are used, resulting in increased spread and greater risk of contaminated food products.

On non-organic dairy farms, cows are routinely given antibiotics at the end of their lactation to prevent mastitis. In addition, milk from cows given antibiotics for treatment, or prevention, is often fed to calves when it contains residues and cannot be sold. However, because ESBL E. coliO26 is resistant to all the antibiotics used in ‘dry cow therapy' and many of those used for treatment, the high use of antibiotics on dairy farms will promote the rapid spread of these dangerous bacteria.

Soil Association Policy Adviser, Richard Young said: "This is one of the most worrying developments in the continuing rise of ESBL E. coli. Today is the first European Antibiotics Awareness Day, but there is a distinct lack of awareness that the continuing high use of antibiotics in farming is contributing to the increase in antibiotic-resistant infections in humans.

"The Government often calls on doctors to prescribe antibiotics less often. But similar advice needs to be given to veterinary surgeons and farmers. Half of all antibiotics are given to animals, and there is mounting evidence that antibiotic-resistant bacteria in farm animals pass to humans. If we want antibiotics to save lives in the future as they have done in the past then the Government must provide specific recommendations based on scientific advice, and vets need to pull together with doctors to limit the use of problematic drugs."

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