July 14, 2015
Category: Uncategorized
Tags: asthma   allergies   eczema   shellfish  
​Can patients with shellfish allergy safely receive radiocontrast media?? 
-I frequently have patients who are told that their shellfish allergy is due to iodine.
 These patients are often told by their health care providers that this excludes them
 from obtaining any imaging studies (CT scans, pyelogram etc.) requiring IV contrast media. 


This is a myth!!! Shellfish allergy is an allergic reaction to a protein contained in the shellfish and not iodine. There is no such thing as an iodine allergy which is an essential mineral contained in our own thyroid hormones. In the 1920s, the U.S “iodized” salt to prevent iodine deficiencies which can result in goiter and cognitive difficulties.  While shellfish ( shrimp, etc) do contain ample amounts of iodine, there are many foods we eat daily that contain high levels of iodine as well. For those of you who suffer from a shellfish allergy, there is no increased risk in obtaining an imaging study containing iv contrast media. Patients who have had reactions to radiocontrast media, there is no increase for a shellfish allergy. 

                               Matthew Mardiney, M.D.

March 16, 2015
Category: Uncategorized
Tags: Untagged

 How can cleaning or cleaning incorrectly provoke allergies? Are there any ways, products, or methods that could be used that would not provoke my allergies? ​ "How can cleaning, or cleaning incorrectly provoke allergies? Are there any ways, methods, or products, that could be used that would not provoke the allergies?" 


  1. Cleaning without providing proper allergen barriers for yourself is a common mistake. Often allergy symptoms can be delayed so the cleaner does not realize the impact until its too late. Wearing a dust mask, gloves, and goggles particularly with the heavier cleaning is a good idea. Showering immediately after cleaning is also helpful.
  2. The old-time feather duster should not be used in cleaning as this simply relocates and stirs up dust. Obviously this can be provoking to the allergy sufferer. Cleaning/dusting should be done with a damp cloth or rag to better capture allergens.
  3. Use of an older "low efficiency" vacuum can be a provoker of indoor allergies. While These vacuums are adequate in picking up dust bunnies and debris, it does little for the common  allergenic particle which is too small for this vacuum to capture...essentially shooting  allergens into the air. 
  4. Fortunately, almost all of the newer vacuums have HEPA (high efficiency particulate air) filters which capture allergens such as dust mite, mold, and pet dander. 

Matthew Mardiney, M.D.

By Dr. Matthew Mardiney
February 03, 2015
Category: Food Allergy

Developing an Allergy to a New Pet?

If you're allergic to cashews, are you also allergic to mangos, since they are in the same family? I ask this because of that "family connection"(same toxins, also kin to poison ivy), and because I have a friend who's allergic to apples AND pears because they are in the same family. 

Cashew, mango, pistachio, and poison ivy are all part of the evergreen tree family. Mango also contains a fruit profilin  which is also contained in apple, pear, and peach. Due to these cross-reactive proteins there is  a possibility of these foods having a family effect. Patients who are cashew allergic typically will be clinically allergic to pistachio and less likely allergic to mango. While allergy testing can give some predictive value the only way to truly prove allergy is oral challenge.  Obviously in most cases this would be needed to be done  under close supervision.

Matthew Mardiney, M.D.

By Dr. Matthew Mardiney
February 03, 2015
Category: Allergy
Tags: asthma   pets   dogs   immunotherapy   allergy shots   allergens   dander  

Unfortunately, Sometimes You Can Become Allergic to a Beloved PetDeveloping an Allergy to a New Pet?

Can someone develop and allergy to something they're close to?  Specifically, MY pet.  Can allergies be that specific? 

Allergy is a genetic disorder that involves reactivity to specific allergens such as dust mite, pollens, and animals to name a few. Unfortunately, allergies can turn on at any time for unknown reasons. It is very common to see a pet owner develop allergy to their pet over time. Relocation of their animal or treatment with medication and possible allergy shots is often necessary.

Matthew Mardiney, M.D.

By Dr. Matthew Mardiney
May 06, 2014
Category: Immunotherapy
Tags: dust   dust mite   allergy serum  

Am I Allergic to Dust or Dust Mites?

Is it possible to be allergic to dust but not dust mites?  I am on immunotherapy for several different allergens, one was dust.  Recently, the FDA has taken away the dust serum and is saying that dust mite serum is the same thing?  I was retested for dust mites and didn't have an immediate reaction, but did within 24 hours, a red itchy bump the size of a dime that lasted for several days.  The allergy nurse said it was irrelevant because I didn't react right away within 20 minutes.  My problem is being symptomatic to dust again since it has been eliminated from my weekly shots.  I've been on shots going on two years.  Would appreciate any insight or suggestions!

 Yes!!! You can be allergic to house dust and not dust mite. House dust is a mixture of many substances including shed human skin, mold, animal hair and dander, fibers, and dust mite and its excrement. The amount of each can vary from home to home. The significance of Late Phase skin test Allergic to House Dust or Dust Mites? Dust on Window Blind responses to an airborne allergen such as dust mite has long been controversial. Despite the lack of conclusive data, many allergists consider a delayed response to be significant. This is based on the known fact that the allergic response is made up of an early phase [immediate up to 30 minutes] followed by a more prolonged late phase reaction. The late phase typically occurs 4-8 hours after exposure but can occur even later in some circumstances. Based on this data it can be extrapolated that a delayed response up to 24 hours could be relevant.

Every allergist has their own style and protocol as to what they may remove from serum after a retest. Typically I do not remove an allergen that has shown significant reactivity on previous testing.

Finally, If you seem to be more clinically sensitive to dust.... it may be necessary for your allergist to review your allergy serum makeup and increase the individual components (such as dust mite, mold etc.) that you may have lost with the removal of house dust from your serum. 

Matthew Mardiney, M.D. 

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