Her daughter had suffered painful vomiting and diarrhoea, which she had then passed on to her boyfriend. She was still feeling too unwell to return to work.
Another woman, Lisa Rogers, said she had suffered diarrhoea and nausea for a night and a day since accompanying her brother, a cancer patient, to the oncology day unit on Monday.
Another mother, who also didn't wish to be named, raised concerns about the "disgusting" toilets in neighbouring Starship Hospital, where her 8-year-old son had undergone a double hip operation.
Her son was discharged on Monday last week, but was vomiting by Wednesday and got better only on Monday this week.
Auckland District Health Board (DHB) spokesman Gilbert Wong said there was no outbreak of norovirus or gastroenteritis in any ward at Auckland City Hospital.
Clinical staff would be aware if there was an outbreak and would implement infection control procedures, he said.
Mr Wong did not deny anyone had fallen ill after a hospital visit, but said both norovirus and gastroenteritis were prevalent in the community.
Both were spread by poor hand hygiene.
"They're out there in our neighbourhoods - it's not necessarily something that you can track down to the hospital."
Auckland Regional Public Health Service, which is responsible for monitoring rates of norovirus and gastroenteritis in Auckland, said there were no more outbreaks than usual for this time of year.
The hospital has responded to Ms Ball's complain today.
Ms Ball said she was assured there would be meetings with staff about taking ownership if someone raised an issue.
Mr Wong said he could not discuss the details of her complaint, but said any complaint would be looked at seriously and dealt with promptly.
Anyone with concerns about toilet hygiene should let hospital staff know, he said.
"Cleanliness is a major driver of what happens in hospital - toilets should be checked and cleaned on a regular basis."
