"It seems to be just spread person-to-person so we are thinking a family member has brought it inside and in that environment, where you have a lot of elderly confined in a small space, it spreads quite easily," Ms Tunbridge said.
Ms Morris said the virus had been quickly addressed and the issue had been resolved.
"We followed correct infection control procedures and we were able to isolate and remove the issue very quickly."
Ms Tunbridge said they were notified about the virus on Friday but it did not push for closure.
"We didn't think it was ramping out of control but they just felt that closing was an easier way for them to control so it wasn't going back out to the community.
"The rest home did a really good job at responding - they did everything as per the protocols and procedures.
"It is not a reflection on them doing anything they shouldn't be doing, it's just that you have a lot of elderly people who are very vulnerable - you only need one person vomiting for it to very quickly spread."