MMR vaccine and peanut allergy? New to this...


My 13 month old dd had her first reaction to peanuts last Tuesday with hives and swelling around the mouth and eyes. The Thursday before she had a MMR vaccine along with the chicken pox vaccine. The hives lasted a couple of days but then she got a new rash all over her body. It is now Monday and I don't think her ped really knows what is wrong. He says it might be a rash from her MMR vaccine, totally separate from her peanut reaction. Any thoughts? I have read that alot of you with peanut allergies also have an allergy to eggs. Could this have been the problem and if so what can happen? Also, her ped won't refer us to an allergist because he says she is too young to be tested. Should I be concerned? I think her allergy could be severe since she had swelling? Thanks alot, I'm just now trying to get a grasp on everything! Shan

On Apr 5, 1999

Hi Shan:

I'm sorry to hear about your daughter's reaction. I just wanted to tell you that my son was tested for allergies when he was 10 months old. He had a blood draw and tests were done on the blood sample to determine the severity of his peanut allergy. Perhaps your pediatrician believes your 13mo is too young for skin testing. But there are two different kinds of test: the blood draw and the skin tests. Frankly, I think my 4yo is too young for the skin test (I had the skin test myself one year ago and it is not pleasant). Anyway, my son went to the allergist two days ago to have more testing done. I'll let you all know whether his RAST score has changed or not. The allergist is also testing him for tree nuts and other sundry items.

The best advice I can give anyone new to this allergy is get yourself a board-certified pediatric allergist as soon as possible and read these boards from start to finish (including the archives).


On Apr 5, 1999

Hi...welcome. My son is 16 months old and was tested 3 1/2 months ago for allergy. RAST Test. He is anaphylaxis to eggs and peanuts. In fact, Friday he is going to the allergist for consultation regarding his MMR vaccine. Since he is egg anaphylaxis, it is necessary for the allergist to administer the vaccine. I would ask the doctor about the possibility of giving the RAST test to your child (this is a blood test) to see what she is allergic to. Sean had his for Egg, Peanut, Milk, Wheat, and Soy. His results were positive for Eggs and Peanuts. I hope your pediatrician is willing to do this. Good Luck!

On Apr 5, 1999

Our son was tested at 13 months for peanut allergy using the RAST test. I would insist that your pediatrician refer you to an allergist or take matters into your own hands by calling an allergist yourself (which we did). Most pediatricians (including our's) don't know much about peanut allergies. An allergist can discuss your concerns with you. We were able to determine that our son was very sensitive to peanuts (and soy, oats and almonds) through the RAST (blood) test. We'll have him tested in a year to see if anything has changed. Most children grow out of most food allergies, but unfortunately peanut allergies are not usually outgrown (or so we've all been told).

As you've probably already figured out if you've read the posts on this web site, peanut allergies or potential peanut allergies are to be taken seriously.


On Apr 5, 1999

My daughter was sick with rashes, high fever (105 - 106), sinusitis etc for six weeks following her MMR. I hadn't considered it was due to food allergy involvement but she is allergic to egg and peanut (we didn't know it at the time). I wonder what the connection is with egg allergy and precautions to the vaccines? I have since researched immunizations from both sides (allopathic and naturopathic) for my future children I will choose to wait on some of the immunizations (or not get them at all) until they are older and better able to handle such a shock to the immune system. Allergies are immune system malfunctions and immunizations do affect the immune system drastically. Hopefully your child will be better soon. I hope you're not going through all the tests that we did - catheterizations, x-rays, and blood tests. By the way, her blood test was the worst of these (she had chubby little arms and they couldn't find her veins) so you may want to wait for RAST tests.... you know your child best so use your intuition. There is a non-invasive way of allergy testing called applied kinesiology that is reportedly as accurate, or innaccurate, as the skin and RAST tests. You should check it out. Some are skeptical but it pinpointed our daughters egg allergy so we could finally clear up her excema that we'd been fighting for a year and a half. Anyway, good luck! - lisa PS In case you're still breastfeeding - don't eat peanuts (one of the little things a ped won't tell you that an allergist would)

On Apr 6, 1999

Shan -

Hi. My egg allergic son had his MMR vaccine at the allergist's office (at the insistence of his pediatrician). This is because the vaccine is chick-cell culture based. However, my allergist said it's an over-hyped myth about people allergic to eggs being allergic to the vaccine. However, some people do have reactions to the vaccine (there are alot of inactive ingredients in it as well). Anyway, my son had the vaccine, which was followed by a dose of benadryl, and watched for two hours afterwards, and there was no problem.

I'm wondering if you child developed a mild case of either measles, mumps, or rubella -- does anyone know if this is one of those vaccines which produces a mild case of the disease it protects against? Like with the chicken pox vaccine - your child may develop a few chicken pox. That might explain the rash.

I don't think there is any connection at all between the MMR vaccine and peanut allergy .I'm curious - did your ped at least prescribe an Epi-pen for her, in light of that peanut reaction? If not, you have got to take her to an allergist for proper testing and to get an epi rx.

On Apr 6, 1999

My son was diagnosed with a peanut and egg allergy at 9 months of age. My allergist used the skin prick method and we had absolutely no problems. Now that he is older (4.5), he is much less tolerant of the skin prick test than when he was a baby. But, overall, I find it to be pretty mild (easy for me to say, huh?). The only part that bothers him is that after they prick him, he begins to react to the peanut and egg, and his back itches wildly. When the test is over, they put a cortisone cream on him and he is immediately better.

Because of his egg allergy, my pediatrician suggested that we go to the allergist to do the MMR vaccine. My allergist also said that it is almost unheard of for an egg allergic person to react to the vaccine but we would still use the precaution. The vaccine was uneventful, except for the fact that it took about an hour to have it done because they had to "test" him for it first. Christine

On Apr 6, 1999

Hi Shan,

My son was tested for the peanut allergy at 10 months, following a reaction. He is also allergic to eggs and had his MMR administered in the Allergist's office and he was fine.

I don't think I can add to anything everyone here has's all excellent information! As Noreen posted, read everything on this board. I still go back and read some of the old posts because you can never be "too educated" on this allergy.

Good luck to you and know you are not alone!

On Apr 6, 1999

Hi Shan,

One more opinion about following the advice of your pediatrician on testing - don't. It is pretty well a proven fact that many pediatricians are not up on anyphylactic food allergies, and do not suggest the proper preventitive measures . My son had his first reaction at fifteen months, and the pediatrician treated it as if it were nothing. I asked him on various occasions about allergy testing, and he told me I would be wasting my time and money. After research and reading the postings on this site, I decided to take the matter in my own hands and schedule an appointment with an allergist myself. My son had the skin test, as I was not even aware of RAST testing at the time. As someone mentioned, the pricks really don't seem painful, but the itching around the affected site just about drives the kids crazy until the cream is applied. Overall, it wasn't a terrible experience, and I was much relieved to confirm my suspicions about the allergy, even though my son's results were quite severe. (20x20 Wiel) But, at least I am now aware and am learning the proper preventitive measures. Good luck to you and your child.

On Apr 9, 1999

Avian-based Vaccines

-Adverse reactions to avian-based vaccines have been attributed to the egg protein in the vaccine, as well as hydrolyzed gelatin, sorbitol and neomycin in some of the vaccines. -True anaphylactic reactions to vaccines are rare, including those with minute quantities of avian protein (measles, mumps, yellow fever, and influenza). -a careful history should be taken (by your allergist) to document the symptoms and severity of prior allergic reactions to egg protein, vaccines, and agents contained in vaccines such as gelatin. -With a history of exquisite sensitivity (anaphylaxis) to egg protein, the utility of vaccine skin testing to predict vaccine reactions remains controversial: however, it may be considered in the high risk group, particularly if influenza or yellow fever vaccine are to be administered. If the vaccine skin test is negative, the vaccine can be given. -If a positive skin test to a vaccine is obtained, a desensitization is not felt to be necessary by some experts. Adverse reactions have been reported during skin testing and desensitization, so these procedures should be performed by personnel trained to treat anaphylaxis.

This is taken from Summary Statements re: Anaphylaxis, from the American College of Allergy, Asthma, and Immunology's web site.