Cases reported "Food Hypersensitivity"

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1/4. Auriculotemporal nerve syndrome.

    INTRODUCTION: Auriculotemporal nerve syndrome is characterized by erythema, perspiration, heat and pain localized in the area supplied by the auriculotemporal nerve in response to gustatory stimuli after the ingestion of different types of food. This syndrome may be confused with food allergy. CASE REPORT: A 21-year-old woman complained of erythema, sweat and heat in the right cheek after intake of several foods such as chocolate, fruits, and nuts for the previous 8 months. She had fractured her jaw two years previously. methods: skin prick tests were performed with a standard battery of common inhalant allergens and with an extensive panel of food allergens. Prick-by-prick tests were also performed with fruits, nuts, and cacao. Total and specific IgE were measured. Open oral food challenge test was performed. RESULTS: skin prick tests were positive for grass and olive pollen. Prick-by-prick tests and specific IgE antibodies to the different foods were all negative. Open oral challenge test with apple reproduced the symptoms. CONCLUSIONS: This benign syndrome is often misdiagnosed as a food allergy.
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ranking = 1
keywords = olive
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2/4. role of Dau c 1 in three different patterns of carrot-induced asthma.

    OBJECTIVE: To assess the role of Dau c 1 in three patients with carrot induced asthma. MATERIAL AND methods: Patient 1 had asthma when handling raw carrots. Sensitization to pollens wasn't detected. Patient 2 had rhinoconjunctivitis due to grass and olive pollen allergy. She had asthma when handling raw carrots. Patient 3 was diagnosed of rhinoconjunctivitis and asthma due to allergic sensitization to mites, several pollens and cat. She had asthma due to raw carrot ingestion and inhalation. IgE immunobot analysis and ELISA inhibition assay were used to investigate the allergens and specific antibodies. RESULTS: IgE Immunoblot Analysis: Dau c 1 from carrot extract and the recombinant rDau c 1 were recognized by IgE from patients 1 and 2. Band of Bet v 1 in birch pollen extract wasn't recognized. Patient 3 didn't recognize any of these allergens. Specific IgE to rDau c 1 was measured by ELISA. Specific IgE ELISA-inhibition with carrot as solid phase showed an intermediate inhibition (30 %) between carrot and rDau c 1 in patient 1; and a considerable inhibition (nearly 100 %) between carrot and rDau c 1 in patient 2. No inhibition was found in patient 3. Specific IgE ELISA inhibition between rDau c 1 and rBet v 1, employing rDau c 1 as solid phase was made in patients 1 and 2. Bet v 1 showed less than 40 % of inhibition of rDau c 1 in patient 1; and an intermediate inhibition (> 40 %) between rBet v 1 and rDau c 1 in patient 2. CONCLUSIONS: Airborne carrot allergens are able to sensitize without the implication of a previous pollen allergy. Dau c 1 was the main allergen in patient 2. In patient 1, there was a band of 30 kd that looks like the predominant allergen. patients 1 and 2 were sensitized directly from carrot allergens. In patient 3, Dau c 1 isn't related to the carrot allergy. Allergy to carrot in patient 3 seems to be related to her allergy to different pollens; however, it wasn't related to birch pollen. Mediterranean countries didn't show the same patterns of food-related pollen allergy than Nordic countries.
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ranking = 1
keywords = olive
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3/4. Simultaneous allergy to vine pollen and grape.

    We report the case of an 18-year-old female student suffering from seasonal rhinoconjunctivitis with sensitization to pollens from vine and also from grass, olive, and chenopodiaceae plants who had recently developed episodes of itching, maculopapular rash, and facial angioedema after eating grapes. Testing revealed positive reactions to vine pollen and grapes, and specific IgE were found for both allergens. immunoblotting and inhibition assays revealed cross-reactivity between the allergenic structures of vine pollen and grape fruit and also among botanically unrelated pollens.
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ranking = 1
keywords = olive
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4/4. hypersensitivity to carrot associated with specific IgE to grass and tree pollens.

    This study deals with a 34-year-old female cook with no previous history of atopy, who was studied because of allergic rhinoconjunctivitis and contact urticaria in both hands associated with severe itching when she handled raw carrot. The patient had had anaphylactic episodes after accidental ingestion of raw carrots, but she tolerated cooked carrots. skin prick tests with carrot, celery, and olive, and birch, grass, and mugwort pollens were positive. Total IgE was 411 UI/ml. Specific IgE to olive, grass, and weed pollens were 10.92, 6.17, and 2.4 AU/ml, respectively. The histamine release test was positive for carrot, celery, celeriac, and olive pollen up to a dilution of 1/10(6). Immunoblot of raw carrot showed a single IgE-binding 18-kDa band. IgE reactivity for raw carrot immunoblot was completely inhibited by carrot and by celery, but not by olive or grass pollens. Specific IgE to olive pollen was not inhibited by carrot. The existence of monosensitization to an 18-kDa protein in carrot and specific IgE to olive pollen has not been reported in the celery-carrot-mugwort-spice syndrome.
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ranking = 6
keywords = olive
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