Quercia O, Emiliani F, Foschi F G, Stefanini G F
Allergy Unit, Internal Medicine Department, Ospedale per gli Infermi Faenza (Ra), Italy.
Eur Ann Allergy Clin Immunol. 2005 Feb;37(2):66-8.
Anaphylaxis is a severe, life-threatening allergic reaction, affecting both children and adults. The occurrence of anaphylaxis is not as rare as generally believed (1.21% to 15.04% of the US population). Often the cause of this reaction remain unknown, mainly due to the difficulty in defining the outbreaking causes. Herein, we describe an interesting case of a patient, who developed an anaphylactic reaction after the bite of a pigeon tick. During the last 2 years, in wintertime, the patient often came to the emergency room for general rash and swelling, hypotension and tachycardia preceded by itching and general distress. Notably, the symptoms manifested themselves as night fell. In two particular occasions the patient reached the hospital in a state of shock. After another episode of general swelling, the patient was invited to examine her domestic environment. She brought us some parasites, collected at home, particularly on the bed. A morphological examination by entomologists proved these parasites to belong to Argas reflexus (Arg.r.), one of the 31 species of soft ticks. The presence of specific IgE to a protein secreted by the Arg.r. salivary glands was in favour of immediate-type systemic reaction, as supposed by the clinical history.
过敏反应是一种严重的、危及生命的过敏反应，影响儿童和成人。过敏反应的发生并不像人们普遍认为的那样罕见（占美国人口的1.21%至15.04%）。通常这种反应的原因仍然不明，主要是由于难以确定爆发原因。在此，我们描述了一个有趣的病例，一名患者在被鸽蜱叮咬后发生了过敏反应。在过去两年的冬季，该患者经常因全身皮疹、肿胀、低血压和心动过速前来急诊室，之前伴有瘙痒和全身不适。值得注意的是，症状在夜幕降临时出现。在两个特殊情况下，患者休克状态被送到医院。在又一次全身肿胀发作后，患者被邀请检查其家庭环境。她给我们带来了一些在家里收集到的寄生虫，特别是在床上。昆虫学家的形态学检查证明这些寄生虫属于波斯锐缘蜱（Argas reflexus，Arg.r.），它是软蜱的31个物种之一。如临床病史所推测的那样，针对波斯锐缘蜱唾液腺分泌的一种蛋白质的特异性IgE的存在支持速发型全身反应。
