A mother of three in Gladstone also found two needles in a punnet while cutting up the fruit.
NSW Police Force has received reports of strawberries contaminated with sewing needles and pins purchased at supermarkets at Tweed Heads, Taree, and Wingham.
Van Dorp had to be taken to the emergency room with 'severe abdominal pain'.
She urged anyone uncertain about the safety of their fruit to cut the strawberries in half before eating them.
The supplier, police and health and safety officials have also been contacted.
Queensland Police Service investigations are continuing.
Sewing needles have been found in six brands of strawberries sold at Woolworths in four Australian states.
Queensland's Chief Health Officer Dr Jeanette Young has requested retailers withdraw all Donnybrook strawberries through a trade level recall. The two brands can be found in Woolworths and potentially other stores.
"We've got to look at this as a whole, it's a very, very broad picture and we can't speculate in any way, shape or form", Queensland Acting Chief Superintendent Terry Lawrence said.
"[It's been done] obviously to injure somebody", he said.
While the problem first emerged on Sunday, authorities only issued warnings yesterday after two more contamination incidents emerged in Victoria late on Tuesday night.
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Farther up the coast, in New Bern, about 150 people waited to be rescued from floods on the Neuse River, WXII-TV reported. Ocean water flowed between homes and on to streets on the Outer Banks; waves crashed against wooden fishing piers.
Police said they believed another case to be a copycat - a small silver rod was found sitting on top of strawberries in a punnet purchased at a Coles in Gatton.
Alternatively, shoppers who had frozen their strawberries could keep them until after police finished their investigation.
The growers association released a statement acknowledging the reports.
One woman wrote on the post: "Sent my 7 year old to school with this brand strawberries this morning".
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Det. Supt. Lawrence said officers were now identifying past and present employees of the two farms concerned, which involves more than 100 people, with plans to interview them.
"Luckily he'd pulled it back out of his mouth", Stevenson said. He is the only person believed to have swallowed a needle.
Strawberries Australia's industry development officer Jennifer Rowling told the ABC that the industry is "devastated by this incident and it's distressing to think that someone's done something like this".
She said the punnets were both Delightful Strawberries branded products.
"I don't know, because the problem is there's so many people handling the fruit all the time, and packing, so I can not say where it happened", he told a Channel 9 reporter.
It comes after Queensland Health advised for anyone concerned they may have consumed the contaminated strawberries to contact 13 43 25 84 or speak to their GP immediately.