This brings the total number of cases here to eight.
The eighth case is in a female who recently returned from the USA. She has mild flu symptoms and is recovering at home.
The Public Health Agency is arranging a follow-up of people who were in close contact with her since she developed symptoms.
Health Minister Michael McGimpsey said, "It is not surprising that other cases are beginning to emerge and I would again urge people not be alarmed. I am pleased to hear that this woman is recovering well.
"Even though WHO have this week declared a global pandemic, I would again urge the public not to be alarmed. We have prepared for a pandemic and I am confident that we are well equipped to deal with it.
"Our containment strategy to use antivirals to slow the spread of the virus also appears to be effective, as well as reducing symptoms. But we cannot be complacent. We will continue to be vigilant to ensure we are well-placed to deal with any emerging situation."
As part of Northern Ireland's pandemic flu preparations, enough antivirals have been stockpiled to treat 50% of the population, which is currently being increased to treat 80% of the population. Antivirals will help to reduce the severity of symptoms and help make a patient less infectious. Facemasks and respirator masks have also been stockpiled for the use by health and social care staff caring for patients with pandemic flu. These stocks are also being increased.
Dr Elizabeth Mitchell, Northern Ireland's Acting Chief Medical Officer added, "I would again ask everyone to play their part to protect and prepare themselves and their families. Simple, effective measures can help reduce the spread of flu - always use a tissue to cover your mouth and nose when sneezing, dispose of the tissue and then wash your hands with soap and water or sanitising gel. The message is simple, Catch It, Bin It, Kill It."
The Northern Ireland Swine Flu helpline (0800 0514 142, from Monday - Friday 9am-6pm) provides advice to the public on swine flu. A national Swine Flu Information line is also available on 0800 1 513 513.
NOTES TO EDITORS:
1. The Northern Ireland swine flu helpline number 0800 0514 142 is a freephone helpline for those who have recently returned from Mexico or another affected area and are worried and need more information.
2. The UK-wide flu information line on 0800 1 513 513 provides regularly updated advice! on swine flu. This is a freephone number also.
3. A public information campaign is currently underway and includes television, radio and print adverts. The adverts provide information on swine flu and remind people to cover their noses and mouths with tissues when they cough and sneeze and then throw the tissue away and wash their hands. The message is simple: Catch it. Bin it. Kill it.
4. Information leaflets are also available at all ports and airports across Northern Ireland providing advice for travellers returning from swine-flu affected areas.
5. Further information about swine flu can be found at DHSSPS website or nidirect website
6.Media enquiries to the DHSSPS Press Office on 028 9052 0579. Out of office hours contact the Duty Press Officer via pager number 076 9971 5440.
