James M. Tracy

The natural history of exposure to the imported fire ant (Solenopsis invicta).

BACKGROUND Imported fire ants (IFA) are a common cause of insect venom hypersensitivity in the southeastern United States. The purpose of this study was to determine the sting attack rate and development of specific IgE in an unsensitized population. METHODS Study participants consisted of 137 medical students with limited exposure to IFA-endemic areas who were temporarily training in San Antonio, Tex. Subjects were surveyed for prior IFA exposure with a questionnaire, and IFA-specific IgE was evaluated with RAST and intradermal skin testing. Evaluations were performed on arrival and reported at departure from the endemic area 3 weeks later. RESULTS One hundred seven subjects completed the study. Field stings were reported in 55 subjects, resulting in a sting attack rate of 51%. In these 55 subjects 53 (96%) reported a pustule or a small local reaction at the sting site, one (2%) reported an isolated large local reaction, and none reported a systemic reaction. At the 3-week follow-up skin test and RAST conversions occurred in seven subjects (13%) and in one subject (1.8%), respectively. CONCLUSIONS Even brief exposures to IFA-endemic areas result in significant sting rates and concurrent rapid development of IFA-specific IgE in 16% of stung subjects.

Stinging insect hypersensitivity: A practice parameter update 2016

Reprints: David B. K. Golden, MD, Department o dbkgolden@gmail.com. Disclaimer: The American Academy of Allergy, A accepted responsibility for establishing “Stinging I time. The medical environment is a changing envi of many participants, no single individual, includ practice parameters. Any request for information a the AAAAI or the ACAAI. These parameters are no Disclosures: The following is a summary of inter family member interests). Completed Conflict of In its website. Dr Golden has served on the speaker’s witness for & Trifrolis, PC, and is a section editor UptoDate. The other Work Group members have n conflict with development of a completely unbiase conflicts from influencing the final document in discussions concerning topics related to the poten remove potential bias. In addition, the entire docu sent for review both by invited reviewers and by Chief Editor: David B. K. Golden, MD Practice Parameter Work Group: David B.K. Gold Allergy, Asthma & Immunology Center of Alaska, Allergy Clinic, San Antonio, Texas; David Graft, MD Minneapolis, Minnesota; Michael Tankersley, MD, of Nebraska College of Medicine, and Allergy, Asth University Medical Center, Palo Alto, California. Membersof theJointTaskForceonPracticeParame of Cincinnati CollegeofMedicine,Cincinnati, Ohio; Joa Department of Pediatrics, University ofMissouri-Kan City,Missouri;MatthewGreenhawt,MD,AllergySect of InternalMedicine, University of Texas Southweste Institute, ClevelandClinic, Cleveland,Ohio; RichardN Internal Medicine, New JerseyMedical School, Pulmo Mercy Hospital, and Department of Pediatrics, Unive AffiliatedHospitals, Center for Allergy, Asthma, & Imm Medical College, Hershey, Pennsylvania; and DanaW InvitedReviews(inalphabeticalorder):WesleyBurk Columbia, Maryland; AndrewMurphy, MD, Downin All published practice parameters are available at htt The Joint Task Force hasmade a concerted effort to ac appropriate recognition of such contributions is mad

Practice ParameterStinging insect hypersensitivity: A practice parameter update 2016

Reprints: David B. K. Golden, MD, Department o dbkgolden@gmail.com. Disclaimer: The American Academy of Allergy, A accepted responsibility for establishing “Stinging I time. The medical environment is a changing envi of many participants, no single individual, includ practice parameters. Any request for information a the AAAAI or the ACAAI. These parameters are no Disclosures: The following is a summary of inter family member interests). Completed Conflict of In its website. Dr Golden has served on the speaker’s witness for & Trifrolis, PC, and is a section editor UptoDate. The other Work Group members have n conflict with development of a completely unbiase conflicts from influencing the final document in discussions concerning topics related to the poten remove potential bias. In addition, the entire docu sent for review both by invited reviewers and by Chief Editor: David B. K. Golden, MD Practice Parameter Work Group: David B.K. Gold Allergy, Asthma & Immunology Center of Alaska, Allergy Clinic, San Antonio, Texas; David Graft, MD Minneapolis, Minnesota; Michael Tankersley, MD, of Nebraska College of Medicine, and Allergy, Asth University Medical Center, Palo Alto, California. Membersof theJointTaskForceonPracticeParame of Cincinnati CollegeofMedicine,Cincinnati, Ohio; Joa Department of Pediatrics, University ofMissouri-Kan City,Missouri;MatthewGreenhawt,MD,AllergySect of InternalMedicine, University of Texas Southweste Institute, ClevelandClinic, Cleveland,Ohio; RichardN Internal Medicine, New JerseyMedical School, Pulmo Mercy Hospital, and Department of Pediatrics, Unive AffiliatedHospitals, Center for Allergy, Asthma, & Imm Medical College, Hershey, Pennsylvania; and DanaW InvitedReviews(inalphabeticalorder):WesleyBurk Columbia, Maryland; AndrewMurphy, MD, Downin All published practice parameters are available at htt The Joint Task Force hasmade a concerted effort to ac appropriate recognition of such contributions is mad

Risk and safety requirements for diagnostic and therapeutic procedures in allergology: World Allergy Organization Statement

One of the major concerns in the practice of allergy is related to the safety of procedures for the diagnosis and treatment of allergic disease. Management (diagnosis and treatment) of hypersensitivity disorders involves often intentional exposure to potentially allergenic substances (during skin testing), deliberate induction in the office of allergic symptoms to offending compounds (provocation tests) or intentional application of potentially dangerous substances (allergy vaccine) to sensitized patients. These situations may be associated with a significant risk of unwanted, excessive or even dangerous reactions, which in many instances cannot be completely avoided. However, adverse reactions can be minimized or even avoided if a physician is fully aware of potential risk and is prepared to appropriately handle the situation.Information on the risk of diagnostic and therapeutic procedures in allergic diseases has been accumulated in the medical literature for decades; however, except for allergen specific immunotherapy, it has never been presented in a systematic fashion. Up to now no single document addressed the risk of the most commonly used medical procedures in the allergy office nor attempted to present general requirements necessary to assure the safety of these procedures.Following review of available literature a group of allergy experts within the World Allergy Organization (WAO), representing various continents and areas of allergy expertise, presents this report on risk associated with diagnostic and therapeutic procedures in allergology and proposes a consensus on safety requirements for performing procedures in allergy offices. Optimal safety measures including appropriate location, type and required time of supervision, availability of safety equipment, access to specialized emergency services, etc. for various procedures have been recommended.This document should be useful for allergists with already established practices and experience as well as to other specialists taking care of patients with allergies.

Anaphylaxis and insect allergy.

Purpose of reviewAnaphylaxis is an acute-onset and potentially life-threatening allergic reaction that can be caused by numerous allergic triggers including stinging insects. This review focuses on recent advances, natural history, risk factors and therapeutic considerations. Recent findingsRecent work suggests that concerns over insect allergy diagnosis continue to exist. This is especially true with individuals who have a convincing history of a serious life-threatening anaphylactic event, but lack the necessary diagnostic criteria of venom-specific IgE by skin test or in-vitro diagnostic methods to confirm the diagnosis. The role of occult mastocytosis or increased basophile reactivity may play a role in this subset population. Additionally, epinephrine continues to be underutilized as the primary acute intervention for an anaphylactic reaction in the emergent setting. SummaryThe incidence of anaphylaxis continues to rise across all demographic groups, especially those less than 20 years of age. Fortunately, the fatalities related to anaphylaxis appear to have decreased over the past decades. Our understanding of various triggers, associated risk factors, as well as an improved understanding and utilization of biological markers such as serum tryptase have improved. Our ability to treat insect anaphylaxis by venom immunotherapy is highly effective. Unfortunately, anaphylaxis continues to be underappreciated and undertreated especially in regard to insect sting anaphylaxis. This includes the appropriate use of injectable epinephrine as the primary acute management tool. These findings suggest that continued education of the general population, primary care healthcare providers and emergency departments is required.

Insect anaphylaxis: where are we? The stinging facts 2012

Purpose of reviewInsect allergy remains an important cause of morbidity and mortality in the United States. In 2011, the third iteration of the stinging insect hypersensitivity practice parameter was published, the first being published in 1999 and the second in 2004. Since the 2004 edition, our understanding of insect hypersensitivity has continued to expand and has been incorporated into the 2011 edition. This work will review the relevant changes in the management of insect hypersensitivity occurring since 2004 and present our current understanding of the insect hypersensitivity diagnosis and management. Recent findingsSince the 2004 commissioning by the Joint Task Force (JTF) on Practice Parameters of ‘Stinging insect hypersensitivity: a practice parameter update’, there have been important contributions to our understanding of insect allergy. These contributions were incorporated into the 2011 iteration. Similar efforts were made by the European Allergy Asthma and Clinical Immunology Interest Group in 2005 and most recently in 2011 by the British Society of Allergy and Clinical Immunology. SummaryOur understanding of insect allergy, including the natural history, epidemiology, diagnostic testing, and risk factors, has greatly expanded. This evolution of knowledge should provide improved long-term management of stinging insect hypersensitivity. This review will focus primarily on the changes between the 2004 and 2011 stinging insect practice parameter commissioned by the JTF on Practice Parameters, but will, where appropriate, highlight the differences between working groups.

Insect anaphylaxis: addressing clinical challenges

Purpose of review Few allergic reactions are as potentially life-threatening, or frightening to the patient, as anaphylaxis. Food, medications, and insect stings are the three most common triggers of anaphylaxis, but insect allergy provides the best opportunity to understand the biology of anaphylaxis. If the physician can establish a diagnosis of insect allergy, treatment with nearly 98% effectiveness can be initiated. However, sometimes patients have a compelling history of insect sting anaphylaxis, but negative skin and blood tests. This situation presents us with a fascinating opportunity to understand the biology of insect anaphylaxis. Recent findings Recent and ongoing work shows that occult mast cell disease may be critical in insect anaphylaxis. Mastocytosis, serum tryptase and basophil biology are key elements; genetic markers may potentially help us diagnose at-risk individuals and determine proper treatment. Understanding basophil activation may play an additional role both in diagnosis and knowing when therapy might be terminated. Summary Mast cell disease, serum tryptase and basophil biology are providing an opportunity to better understand and manage insect allergy. This evolving understanding should improve long-term management of insect anaphylaxis and help us to better understand the clinical dilemma of appropriate management of the history-positive patient in which testing is unable to detect venom-specific IgE. Furthermore, omalizumabs immunomodulatory effects may play a role in difficult-to-treat insect allergy and mastocytosis. Finally, unrelated to these, but still important as an ongoing risk factor, is the continued underutilization of epinephrine for both acute and long-term management of insect anaphylaxis.

A 'difficult' insect allergy patient: reliable history of a sting, but all testing negative

Purpose of reviewFew conditions are as treatable as allergy to stinging insects, with venom immunotherapy (VIT) providing up to 98% protection to subsequent stings. The challenge with VIT is not in the treatment, but in the diagnosis. To offer VIT, one must determine a history of a systemic reaction to a stinging insect in conjunction with the presence venom-specific IgE. Current diagnostic methods, although sensitive and specific, are imperfect, and some newer testing options are not widely available. A conundrum occasionally faced is the patient with a reliable and compelling history of a systemic allergic reaction yet negative venom-specific testing. This diagnostic dilemma presents an opportunity to consider possible causes for this diagnostic challenge. Recent findingsOur evolving understanding of the role of occult mast cell disease may begin to help us understand this situation and develop appropriate management strategies. Venom-specific skin testing has long been the cornerstone of the evaluation of venom sensitivity and is often combined with in-vitro assays to add clarity, but even these occasionally may fall short. Exploring novel venom diagnostic testing methods may help to fill in some of the diagnostic gaps. Do currently available venom vaccines contain all the key venom species? Are there enough differences between insect species that we may simply be missing the relevant allergens? What is the significance of the antigenicity of carbohydrate moieties in venoms? What is the role of recombinant venom extracts? SummaryVIT is the definitive treatment for insect allergic individuals. To utilize VIT, identification of the relevant Hymenoptera is necessary. Unfortunately, this cannot always be accomplished. This deficiency can have several causes: a potential comorbid condition such as occult mast cell disease, limitations of currently available diagnostic resources, or testing vaccines with an insufficient coverage of relevant venom allergens. Exploring these potential causes may help to provide important insight into this important diagnostic conundrum. The use of a case report may help clarify this challenge.

Prurigo nodularis and Hashimoto thyroiditis

Prurigo nodularis (PN) is a chronic skin condition that presents with diffuse multiple pruritic nodules. Nodules oftenpresent on the extensor surfaces of the extremities and are 0.5 to 3.0 cm in most reported cases. 1 The nodules tend to be extremely pruritic but nonpainful. The condition is a clinical diagnosis that may be supported through histologic identification. There are no confirmatory findings, but many reports include hyperkeratosis or parakeratosis with diminished nerve fiber density. Other histologic findings include acanthosis and an inflammatory perivascular infiltrate in the lower epidermis and upper dermis. 2 The precise cause is unknown but is presumed to be due to an increased number of nerves in the papillary dermis secondary to overexpression of nerve growth factor and receptor tyrosine kinase A. 3 Mast cells can be observed near these nerves and release nerve growth factor. However, these findings are not confirmed, and recent research has suggested that reduced nerve fiber density may suggest a neuropathic cause behind this condition. 4 However, recent studies have

AAAAI/ACAAI Joint Venom Extract Shortage Task Force Report

PREFACE This report has been developed to provide guidance for clinicians who provide venom immunotherapy services to affected patients. The intent is to provide clinicians information about the developing shortage of Hymenoptera venoms to assist them in making decisions about the appropriate care for their patients. The recommendations made by this task force are voluntary and are intended to be strictly temporary in response to an unexpected shortage of Hymenoptera venom extracts. The recommendations will no longer be relevant when the venom supply returns to normal. The recommendations are based on objective clinical and scientific evidence where available, and on clinical experience and expertise where necessary (as identified in the text). We have extensively examined the available evidence related to these issues in the hope of finding solutions. We have made these recommendations with the understanding that some measures are needed to mitigate the venom shortage that likely will exist for some period of time. For situations in which we have a low level of confidence in making recommendations, we have refrained from doing so. Our recommendations are being