Mrs Craigie (24) contracted salmonella Typhimurium phage type 42 about a month ago.
The symptoms included muscle aches and headache and then severe diarrhoea and vomiting, accompanied by high fever.
After three days she became so dehydrated she had to spend a day in hospital.
Mrs Craigie, who lives with husband Robert and their two preschoolers, is a vegetarian. She had not eaten out anywhere.
Fortunately, nobody in her family had picked up the illness, she said.
The origin of the infection was still a mystery.
There was a possibility it came from an egg shell, she said.
Now fully recovered, Mrs Craigie said she wanted to alert people to take extra care with hand hygiene and food preparation because the illness was "just so awful".
Public Health South medical officer of health Dr Marion Poore said since October 13 across New Zealand there had been 36 cases of the strain of salmonella affecting Mrs Craigie.
In 2007, there had been 15 cases across the whole country and the year before that 28.
The increase has prompted the Institute of Environmental Science and Research to co-ordinate a national investigation to investigate cases and attempt to identify a source of infection.
One of the possibilities being investigated was that it could be from a flour-related product.
Most of the cases have been from the South Island, with 16 from Christchurch, five from Nelson and one from Greymouth, with only five cases from the North Island.
Dr Poore said the Dunedin cases had been a range of ages, with only one of them taken to hospital.
It was an illness which normally lasted several days, but the very young, the elderly and the immune-compromised could become severely dehydrated.
There had been two cases notified in Dunedin this week so it was "still an issue which was alive and kicking", she said.
Salmonella are bacteria that typically live in the gut of domestic and wild animals, including poultry, pigs, cattle, rodents and pets.
Common risk factors for infection in New Zealand include direct contact with farm animals and pets, drinking untreated water and overseas travel to countries with high rates of occurrence of the disease.
