Fr Paddy O’Kane, who is based in Derry, said his 93-year-old father is one of the 11 residents receiving treatment at Nazareth House in Fahan.
The residents have died from flu at the nursing home over the past two weeks and a major investigation is under way.
Father O’Kane said he had visited his father at the home and was satisfied that he was receiving “excellent care”.
He told BBC Radio Foyle that he found out about the outbreak through the media, but he didn’t want to make an issue about this.
Fr O’Kane said he understood that the staff’s first priority was towards the patients and he added that they had reassured him about the state of his father’s health.
His father has been a resident of Nazareth House for the past five years and his son said it had met the standards required by the Health and Safety Executive (HSE).
“I have never heard of anyone complaining about the care, nor have we any cause for concern about how my father is being treated,” Fr O’Kane said.
A spokesperson for Nazareth House said they did not comment on individual cases but added that the nursing home was “currently in the process of alerting the families of all those who are currently undergoing treatment to keep them fully informed of the ongoing situation.”
Father O’Kane had revealed yesterday that he had anointed his father.