BBC reports: [edited]
Scientists recreated a 9th Century Anglo-Saxon remedy using onion, garlic and part of a cow's stomach. They were 'astonished' to find it almost completely wiped out methicillin-resistant staphylococcus aureus, otherwise known as MRSA.
They found the remedy killed up to 90% of MRSA bacteria and believe it is the effect of the recipe rather than one single ingredient.
The remedy was found in Bald's Leechbook - an old English manuscript containing instructions on various treatments held in the British Library. It is one of the earliest examples of a medical textbook.