A taskforce was set up to issue advice

Ninety people who attended the reception after the Christening are being contacted by an outbreak control team as part of a health board investigation and letters have been sent to all GPs in the area making them aware of the outbreak.

A public health spokesman said that since it was more than two weeks since the event, it was hoped that most cases had now been identified.

The departments of public health in Glasgow and Lanarkshire, in cooperation with the South Lanarkshire Council and Glasgow City Council environmental health services, are currently contacting all of these individuals as part of their investigation.

Dr Jim McMenamin, consultant in public health medicine, said he was optimistic that the all the cases had been identified.

Given the time delay since the event, we are hopeful that most cases have already been identified

Dr Jim McMenamin

He said: "We have set up an Outbreak Control Team to investigate these cases.

"Usually people affected by this bug develop symptoms within three to five days after eating infected food.

"Given the time delay since the event, we are hopeful that most cases have already been identified."

The Food Standards Agency set up a task force last year to outline environmental advice designed to protect people from the potentially deadly bacterium.

Twenty-one people died from the E.coli bug in 1996 after eating contaminated meat from a Lanarkshire's butcher's shop.

In June, 13 girl guides and their leader contracted E.coli O157 after camping in a field in Inverclyde.