From: "Maximiliano Mendiburu" <[EMAIL PROTECTED]> I found this:
Is a shellfish allergy the same as an iodine allergy ? An allergy to shrimp or crab or salmon, for example, has nothing to do with allergy to iodine. A person could be allergic to both but the allergy to shrimp is due to a protein in the shrimp, not to iodine. Identified seafood allergens belong to a group of muscle proteins, such as the parvalbumins in codfish and salmon and tropomyosin in crustaceans (shrimp, lobster and crabs). In addition, tropomyosin is a cross-reactive allergen among crustaceans and mollusks such as oysters and scallops (5). Eating the seafood is not the only way to have an shellfish allergic reaction; it has also been reported to be air-borne in places such as a fish market > Wrom: AFXISHJEXXIMQZUIVOTQNQE > > Gday All > > As far as I am aware, having looked at a few of the product data for > non-ionic contrast we use, it would appear that any allergic history > including hay fever, asthma etc should be considered significant, though > not a contraindication to ICM. Some of the product literature I have > read does not mention shell fish. > > The following I have found typical of information I have read. > > Risk factors related to idiosyncratic reactions > ----------------------------------------------- > > Idiosyncratic reactions may occur in people with a previous reaction to > ionic or nonionic ICM, asthma, and/or food or medication allergies. > > Previous reactions to ionic or nonionic ICM increases the relative risk > of repeat reaction 3.3- to 6.9-fold compared with the risk in general > population. Approximately 60% of patients who had hives after ICM > administration in the past have hives with a repeat exposure. Similarly, > facial edema, difficulty breathing, and bronchospasm recur in 68%, 59%, > and 38% of patients, respectively. > > Reactions do not recur in all patients. Patients with a history of a > reaction to ICM may report having undergone a recent contrast-enhanced > study without adverse manifestations. Nevertheless, these patients still > have a higher risk than that of the general population. > > People with asthma have 1.2-2.5 times the risk of the general > population. When reactions occur, they are more likely to be severe. > Severe reactions are 5-9 times more common in people with asthma than in > others. > > Patients with allergies, including hay fever, are 1.5-3 times more > likely to have an adverse reaction to ICM than other people. No > consistent data warrant the use of any unique precautions in patients > who have seafood or shellfish allergies. > > Another fact about Shellfish > ---------------------------- > Hepatitis A (HAV), previously known as infectious hepatitis, can occur > as a sporadic or epidemic infection. It is spread by the faecal-oral > route, with outbreaks frequently associated with eating shellfish. > > > > > Jim de Jong > Radiographer +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= This message is being broadcast by AIRNEWS, the Australian Institute of Radiography list Server Send messages to [EMAIL PROTECTED] For assistance send mail to [EMAIL PROTECTED] Commands should be sent to [EMAIL PROTECTED] Opinions expressed on this list are not necessarily those of the moderator, his assistants or those of the A.I.R.
