The phone rang. It was the nursery school. Something bad was happening to Delia Chiaramonte's 4-year-old daughter.
Marina was itching all over. She had a rash. Her throat felt funny. She was sneezing uncontrollably and her face was swollen. Dr. Chiaramonte, a family physician, ordered school officials to call 911. She rushed to the school.
What triggered the sudden emergency? Craft time at school. Marina had made a bird feeder out of birdseed and peanut butter. Somehow, that minor contact had triggered a full-blown allergic reaction.
"She recovered, but I knew what it meant," says Chiaramonte. "It scared me to death."
Marina's experience has grown increasingly common. Roughly 7 percent of children younger than 3 years old experience a documented allergic reaction to food. Peanuts, eggs, milk, wheat and soy are the most likely culprits.
It's not just a matter of more doctors diagnosing food allergies either (although other types of adverse food reactions often get misdiagnosed as allergies, too). Researchers believe food allergies -- like allergies generally -- have become increasingly prevalent worldwide.
No one is certain why this is happening, but a leading theory is that modern hygiene has left immune systems with less to do. Instead of routing out harmful invaders, an infant or toddler's germ-fighting mechanisms mistakenly identify certain kinds of food proteins as a threat to the body and create specific antibodies to fight them.
Once that sensitivity is set in place (usually in the first year of life), the immune system is locked in -- whenever the body comes in contact with that food, the allergic reaction can be immediate and powerful.
Unfortunately, many food allergies aren't diagnosed. Nor are parents always prepared to cope with its consequences. An allergic reaction can cause a variety of symptoms from a mild rash to projectile vomiting, and in its worst cases, anaphylaxis -- an acute condition that causes labored breathing, a drop in blood pressure and, in rare cases, even death.
"A reaction can be immediate and severe -- between 30 seconds and 30 minutes," says Dr. Robert A. Wood, director of the pediatric allergy center at Johns Hopkins Children's Center.
Limit exposure
Wood suspects his fellow physicians need to learn more about how to diagnose a food allergy. Last month, the American Academy of Pediatrics published a 90-page supplement to its journal Pediatrics reviewing current research in food allergies and reviewing their proper diagnosis and management.
