Thirty patients and three members of staff are believed to have contracted the norovirus.
Hospital managers are now urging people to take all the usual measures to stop the problem from getting worse.
Infection Control Manager Elaine Ross explains more:
More top news
Vigils have been held in the region to mark the 100th anniversary of the battle of the Somme.
Vigils will take place across the region tonight to remember those who fought in the Battle of the Somme 100 years ago.
In our Political Editor's latest blog; the Holyrood recess will be used to look at options for the future with the UK outside the EU.