Learn · Contact allergy

One touch, then a hand to the face

How peanut residue on hands, tables and shared equipment puts kids with allergies at risk, and why camp makes it harder to avoid.

Medical review: pending. This page is a draft and hasn't been reviewed by an allergist yet.

The short version

  • Touching peanut usually causes a skin reaction: redness, itching or hives where it touched.1
  • The real danger is where it goes next. Kids touch their mouths, noses and eyes constantly. Residue that reaches the mouth is swallowed, and swallowing even a tiny amount can cause anaphylaxis.4
  • Residue sticks around. Peanut protein can stay on hands and in saliva for hours after someone eats it.3,5
  • Hand sanitizer doesn't remove it. Soap and water do, and so do cleaning wipes.2

How residue reaches a child

Peanut allergy is triggered by peanut protein. Peanut butter, peanut oil residue and crumbs leave that protein behind on whatever they touch. It isn't visible, and it isn't always removed by a quick wipe.

  1. Someone eats peanuts: a bunkmate's trail mix, a counselor's granola bar, a PB&J at lunch.
  2. Their hands carry it to a table, a door handle, a canoe paddle, a ball or a shared marker.
  3. The allergic child touches it, then rubs their eyes, bites a nail or eats a snack with that hand.
  4. The protein reaches their mouth or eyes. On the skin it may cause hives. In the mouth it's swallowed, and that's when severe reactions happen.

How dangerous is it?

For a child with a peanut allergy, swallowing peanut can cause anaphylaxis: a fast, whole-body reaction that can make it hard to breathe and can be fatal without treatment. Some people react to a tiny fraction of a single peanut.4

Reactions are unpredictable. A child who had mild hives last time can have a severe reaction next time. That's why doctors prescribe epinephrine auto-injectors and why avoiding exposure matters so much.

Signs of anaphylaxis include trouble breathing, wheezing or repeated coughing, throat tightness or a hoarse voice, swelling of the lips, tongue or face, widespread hives, vomiting, and feeling faint or dizzy.

Use the child's epinephrine auto-injector right away and call 911. Don't wait to see if it gets better.

Why camp is different

At home, families control what's in the kitchen. At school, there's a nurse down the hall. Camp is days or weeks of shared everything, with teenage counselors and the nearest hospital often far away. Follow a camper through a full day.

The hiking snack

Trail mix gets passed around on the trail. Everyone's hands go in the same bag, then onto the same rope, rock and water bottle.

The care package

A bunkmate's family sends peanut butter cups. They're shared on bunks and pillows after lights-out, with no handwashing.

Arts and crafts

Peanut butter bird feeders, or craft supplies that were last used by someone who just ate lunch.

The waterfront

Canoe paddles, life jackets and swim noodles are used by camper after camper, often right after meals.

The dining hall

Long shared tables that are wiped quickly between seatings, and a jar of peanut butter on the "always available" table.

The canteen

Candy bars and snacks made with peanuts, eaten anywhere in camp, with wrappers and crumbs left on benches.

What actually removes peanut

A 2004 study tested common ways of cleaning peanut allergen off hands and tables.2

Works

  • Washing hands with soap and water
  • Commercial cleaning wipes on hands
  • Household spray cleaners and cleaning wipes on tables

Not enough

  • Alcohol hand sanitizer
  • Rinsing hands with plain water
  • Dish soap on tables (left residue on some)

At camp, that means handwashing stations, not just sanitizer, before and after meals, and real cleaners on tables and shared gear.

Myths and facts

“Just smelling peanut butter can cause a reaction.”
Smell comes from compounds that aren't the allergen protein. In a study of children with peanut allergy, smelling peanut butter didn't cause reactions.1 Peanut dust in the air is different. Shelling or roasting lots of peanuts, or opening many bags at once, can put protein in the air.2
“Touching it won't hurt them, so it's fine.”
A skin reaction is usually where it stops, but touch is how residue gets to the mouth and eyes. Kids touch their faces all the time.
“The allergic kid can just avoid eating peanuts.”
They do. The problem is the residue they can't see: on a paddle, a table or a friend's hands. Lowering the amount of peanut in camp lowers the risk everywhere.
“We'll just use hand sanitizer.”
Sanitizer kills germs, but it doesn't remove peanut protein. Use soap and water.2
“Peanuts and tree nuts are the same thing.”
Peanuts are legumes. Tree nuts are almonds, cashews, walnuts, pecans, pistachios, hazelnuts and others. Many children are allergic to both, and nuts are often processed together, which is why we ask camps to go peanut and tree nut free.

What camps can do

  • Go peanut and tree nut free in the dining hall, canteen, care packages, crafts and trips.
  • Set up soap-and-water handwashing before and after meals.
  • Clean tables and shared gear with real cleaners, not just a damp cloth.
  • Train every counselor to recognize anaphylaxis and use an epinephrine auto-injector.
  • Make sure epinephrine goes with the camper: on hikes, on the water and on trips.

Sources

  1. Simonte SJ, Ma S, Mofidi S, Sicherer SH. “Relevance of casual contact with peanut butter in children with peanut allergy.” Journal of Allergy and Clinical Immunology, 2003;112(1):180–182.
  2. Perry TT, Conover-Walker MK, Pomés A, Chapman MD, Wood RA. “Distribution of peanut allergen in the environment.” Journal of Allergy and Clinical Immunology, 2004;113(5):973–976.
  3. Brough HA, et al. “Distribution of peanut protein in the home environment.” Journal of Allergy and Clinical Immunology, 2013;132(3):623–629.
  4. Taylor SL, et al. “Establishment of Reference Doses for residues of allergenic foods: Report of the VITAL Expert Panel.” Food and Chemical Toxicology, 2014;63:9–17.
  5. Maloney JM, Chapman MD, Sicherer SH. “Peanut allergen exposure through saliva: assessment and interventions to reduce exposure.” Journal of Allergy and Clinical Immunology, 2006;118(3):719–724.

This page shares general information and is not medical advice. Ask your doctor or allergist about your child's allergy.