'Delhi Belly' cure on the way

A vaccine to protect against the dreaded 'Delhi belly' could be on the market within four years, its maker claims. Trials of the vaccine, taken as a drink, showed promising results at tackling the most common cause of diarrhoea for travellers - the E.coli bug.

The results were 'very exciting' and exceeded expectations, Dr Steve Chatfield, of drug company Microscience, said. 'They pave the way for a whole new generation of oral vaccines which are safe, easy to administer and effective,' he added. The vaccine is made from salmonella bacteria which has been made harmless by the removal of key genes.