Sign up for the TODAY newsletter

You have successfully subscribed to the TODAY newsletter.

Subscribe now and get trending stories, celebrity news and all the best of TODAY.

'Misdiagnosed 5 times': Mom speaks out after toddler's sudden death

by A. Pawlowski / / Source: TODAY

Get the latest from TODAY

Sign up for our newsletter

Less than a week after he woke up feeling ill, 2-year-old Grayson Dunham was dead — the victim of an E. coli infection complication that took a grave turn.

Now, his grieving mom is sharing his story hoping to spread awareness so that other families don’t have to go through a similar ordeal.

Get the latest from TODAY

Sign up for our newsletter

“It is a parent’s worst nightmare,” Kayla Dunham, 25, who lives in Sheridan, Indiana, told TODAY. “He had never been sick... When you think of things happening, you think of severe illnesses like cancer or car accidents. You don’t think of E. coli.”

Related: Can Chipotle make a comeback after outbreaks?

The family had been enjoying the summer, visiting a state fair, going to a petting zoo and eating out last month, when Grayson suddenly started vomiting and experiencing diarrhea on the morning of Aug. 10.

 The Dunham family in happier times: parents Kayla and Brent hold Grayson. Courtesy Kayla Dunham

Doctors couldn’t settle on an exact cause, Dunham said. At first, the family was told it was stomach flu, then indications that the boy’s intestines may have been folded over each other, then possible problems with his appendix. As time went by, Grayson started having intense abdominal pain and bloody diarrhea.

“We were misdiagnosed five times before they said, yes this is HUS,” she recalled.

Related: Why a lucky few may be immune to food poisoning

 Grayson laughs during a recent vacation in Michigan. Courtesy Kayla Dunham

HUS, short for hemolytic uremic syndrome, can strike after an E. coli infection of the digestive system, according to the National Institute of Diabetes and Digestive and Kidney Diseases. It destroys red blood cells and clogs the kidneys' filtering system. HUS is the most common cause of acute kidney injury in kids.

Dangerous strains of E. coli can be found in undercooked meat, unwashed contaminated fruits and vegetables and contaminated juice. Animals can also spread E. coli.

 Grayson was a healthy, happy child, his mom said. He had never been seriously sick until last month. Courtesy Kayla Dunham

Grayson’s stool sample ultimately tested positive for Shiga toxin-producing E. coli, Dunham said. The family tried to figure out how he could have been infected: Was it the petting zoo? The restaurants they visited? Produce that his mom bought at a supermarket? The local health department told Grayson’s parents they may never know the source.

Related: You can't judge meat by its color and 4 other common food handling mistakes

Grayson finally ended up in the intensive care unit of a children’s hospital in Indianapolis, Dunham said. Doctors told his parents he was stable for the night and urged them to take a nap in a nearby room, but the family was soon jolted by news the boy was deteriorating.

His hemoglobin — a protein in red blood cells that carries oxygen — had dropped from the normal range to zero, his mom said.

 Grayson died of hemolytic-uremic syndrome. Courtesy Kayla Dunham

Doctors were not able to get his heart pumping on its own and performed CPR for an hour and 45 minutes, but to no avail, she recalled. Grayson passed away at 4:30 in the morning on Aug. 15.

“My heart is in shock, I'm numb, and I don't have words for what even happened,” Dunham wrote on Facebook. Doctors still don't know why her son deteriorated so suddenly, she said.

 Kayla Dunham with her son Grayson. Courtesy Kayla Dunham

It's important to note HUS can be life-threatening, but most children recover without long-term health problems, the National Institute of Diabetes and Digestive and Kidney Diseases reports. The mortality rate for patients with HUS is less than 10 percent.

That's no comfort to parents like Dunham. She urges families to be aware of the symptoms — including vomiting, bloody diarrhea, abdominal pain and fever — and to be an advocate for their children if they suddenly get ill. Ask lots of questions, do your own research and be aware you can demand a stool sample be taken, she said.

She’s now extra careful about washing hands and has signed up for FDA alerts about food and safety recalls. The family has set up a fund in Grayson's name at Riley Children's Hospital.

 Grayson helps announce his little sister's upcoming arrival. Courtesy Kayla Dunham

As Dunham and her husband grieve for Grayson, they’re also getting ready for the arrival of a new member of the family. Dunham is expecting to give birth to a baby girl in January. She plans to name her Graysie.

Follow A. Pawlowski on Facebook, Instagram and Twitter.

Get the latest from TODAY

Sign up for our newsletter
MORE FROM today

Have feedback?

How likely are you to recommend today.com to a friend or colleague?

0 = Very unlikely
10 = Very likely
Please select answer

Is your feedback about:

Please select answer

Leave your email if you’d like us to respond. (Optional)

Please enter a valid email address

Thank you!

Your feedback has been sent out. Please enjoy more of our content.

We appreciate your help making today.com a better place.