Walking the Allergy Tightrope

Total Page:16

File Type:pdf, Size:1020Kb

Walking the Allergy Tightrope PARLIAMENT OF THE COMMONWEALTH OF AUSTRALIA Walking the allergy tightrope Addressing the rise of allergies and anaphylaxis in Australia House of Representatives Standing Committee on Health, Aged Care and Sport May 2020 CANBERRA © Commonwealth of Australia ISBN 978-1-76092-094-4 (Printed Version) ISBN 978-1-76092-095-1 (HTML Version) This work is licensed under the Creative Commons Attribution- NonCommercial-NoDerivs 3.0 Australia License. The details of this licence are available on the Creative Commons website: http://creativecommons.org/licenses/by-nc-nd/3.0/au/. Chair's Foreword Australia has been called the world’s ‘allergy capital’ because of the increases in rates of allergies and anaphylaxis over the last twenty years. Over four million Australians live with allergies, and for many it is a tightrope to walk every day. As there is essentially no cure for allergies, it has become a significant public health issue - highlighted by the long waiting lists for patients to see allergy specialists throughout Australia. An allergy occurs when a person reacts to a substance in the environment that is harmless to most people. Humans can be allergic to any protein, but some of the more common allergens are found in dust mites, pets, pollen, insects, ticks, moulds, foods and medications. Anaphylaxis is the most severe form of allergic reaction and is life threatening if not immediately treated. Prevalence levels for allergic disease are collated from a range of National Health Surveys, Census data and hospital admissions. However, there is no nationwide data collection to provide accurate statistics on allergic disease to assist future research. To understand allergies better, this report recommends the establishment of a national centre for allergies and anaphylaxis to undertake research on current and emerging allergies and to establish a national register for anaphylaxis and drug allergies. Australia is currently a world leader in allergy research, but further research is necessary to understand and treat allergic disease. For example, vital work on the treatment of insect allergy has happened in Australia, including the breakthrough development of Jack Jumper Ant venom immunotherapy in Tasmania, as well as work on tick allergies. While there has been progress in understanding food allergy, with hospital admissions for food allergy increasing four fold over the past 10 years, it is crucial that further research be undertaken to assist with prevention, diagnosis, treatment and ultimately a cure. The Committee’s recommendation to establish a national centre for allergies and anaphylaxis will facilitate long term research into allergies. iii iv Australia has a ten per cent rate of food allergies for infants up to 12 months. This makes infant feeding particularly stressful for many Australian parents and long term it can have an overall negative impact on the quality of life for the individual and the family. The Committee received evidence from many parents who vigilantly manage their child’s severe and sometimes life-threatening food allergies. Daily life, including activities such as attending school or work and social engagements, is stressful for many people living with allergies. In some severe cases, it is extremely debilitating. Food is not only vital for life; it plays a large part in our social lives. Many people – both children and adults – told the Committee how their food allergies left them feeling excluded from social occasions. For many people with food allergies, food labels cause daily challenges. The Committee heard that improvements to Plain English Allergen Labelling are currently underway that will make allergen labelling clearer and more consistent. The Committee recommends that these improvements be expedited to assist people living with food allergies. Precautionary Allergen Labelling is an issue that causes frustration and anxiety for people with food allergy. This type of labelling informs food consumers of the possible presence of food allergens in a product when the allergen was not intentionally added but may have occurred due to cross contact. Most people would have read on the back of a food package words like “may contain tree nuts”. Up to sixty-five per cent of processed foods have a precautionary allergen label. This report recommends the development of a label to demonstrate that a food product has been assessed for certain allergens. This will lead to improved consumer confidence for some food products and will reduce the risks for people with food allergies every time they consume packaged food items. As there is no cure for allergies, the current expert advice is to avoid the allergen if it is known. In the event of an anaphylactic reaction, an adrenaline auto-injector or EpiPen is required to treat patients and hospital admission is required. It was concerning to hear that Australia experiences shortages of EpiPens when a manufacturing fault or contamination occurs within the production line. Currently, there is no alternative adrenaline auto-injector available in Australia. This report recommends that the Australian Government respond to this problem to encourage an alternative supplier in order to keep Australians living with allergies safe. Many individuals, especially parents of children living with food-related allergies, advocated for the increased availability of food immunotherapy. Currently food immunotherapy is not offered in Australia and several families told the Committee they had travelled overseas to receive immunotherapy for their children. This is an v area that will benefit from further research in Australia and this report recommends that clinical research be undertaken with the aim of being able to offer safe and well understood food immunotherapy in the future. Data on drug allergy is needed to improve the way Australia understands allergies. Drug and medicine allergy is a complex and costly problem. Besides the risk of anaphylaxis, other adverse drug reactions may cause significant morbidity and mortality. Australia currently has no systematic collection of data about adverse drug reactions. The Committee’s recommendation to establish a national centre for allergies and anaphylaxis will be important for managing a national register for drug allergy. Australia lacks a consistent approach to allergy and anaphylaxis management. Many people reported difficulties in accessing and receiving a diagnosis, often having to see several doctors and specialists before their or their child’s symptoms could be diagnosed. Timely access to specialists is a concern that was brought to the Committee’s attention. Australia has a limited number of allergists and immunologists and waiting lists for both public and private specialists are between six months and two years across many parts of Australia. Most of these specialists are in or near major cities so patients in rural and regional areas must travel long distances to see allergy specialists. The Committee has recommended providing telehealth funding support for doctors and allied allergy health workers to support allergy patients in rural, regional and remote Australia. The Committee heard there is a lot of misinformation available on the internet and this lack of consistent advice combined with long waiting times to see specialists results in people getting desperate for solutions and treatments to allergies. This report recommends a national framework be developed for allergies and anaphylaxis including a Shared Care Model for allergies and the development of Clinical Care Standards for anaphylaxis. Medical experts informed the Committee that medical education in relation to allergies and anaphylaxis was inadequate in Australia. This was the case for many General Practitioners, Paediatricians and other medical and health professionals. The incidence of drug-related anaphylaxis is high in Australia and accounts for fifty per cent of anaphylactic deaths. This is an area of concern that gets little attention despite significant health issues that arise from drug allergy mismanagement. This report highlights the need to improve education and training in allergies and anaphylaxis for all medical and health practitioners. In addition to the medical and health profession, the Committee recognises that a majority of the population lacks a good understanding of allergies and anaphylaxis. I hope that this report assists in educating the general community and vi other important industries such as food service, schools, hospitals and airline industries on allergies and anaphylaxis. Finally, I would like to thank the individuals and organisations who took the time to write submissions and appear at public hearings. I am grateful to the people who live with allergies who shared their unique circumstances and experiences. I particularly want to thank those who discussed their traumatic experiences of losing loved ones to anaphylaxis. I hope that the recommendations in this report will lead to changes that assist people living with allergic disease to have a better quality of life in the future. My sincere thanks to all Committee members for their engagement with this inquiry. I am especially grateful to several Committee members who contributed their own medical expertise and knowledge of this topic, which assisted the Committee to be well informed and to understand the more technical issues of the inquiry. I also extend the Committee’s thanks to the secretariat who brought their professionalism and dedication to the conduct of the inquiry.
Recommended publications
  • Allergic Reactions to Bites and Stings
    Allergic Reactions to Bites and Stings ASCIA EDUCATION RESOURCES (AER) PATIENT INFORMATION Most insect bites and stings result in a localised itch and swelling that settles within a few days. Severe allergic reactions (anaphylaxis) to insects are relatively uncommon, and are usually due to bees, wasps or the Australian Jack Jumper ant. Fortunately, effective treatments are available to treat allergic reactions to bites and stings. Stinging insects are a common cause of anaphylaxis Allergies to venoms from stinging insects are one of the most common causes of severe allergic reactions (anaphylaxis) in Australia. Symptoms include an all over rash, swelling of tongue or throat, trouble breathing, gut cramps, diarrhoea, vomiting or even a drop in blood pressure (shock). Although the insects are all hymenoptera (which means membranous winged insects), their venoms are very different. Allergy to one type of stinging insect does not usually increase the risk of reaction to another. The Honey Bee is the most common cause of allergic reactions in Australia. Paper Wasps and European Wasps can sting multiple times. The European Wasp is becoming an increasing problem in Australia, is particularly aggressive and likes to get inside drink cans at barbeques, although the more familiar Paper Wasp is responsible for the majority of serious stings. The Australian Jack Jumper Ant (Myrmecia pilosula) is a medium sized black bull ant prevalent down the eastern side of Australia and Tasmania. It can be recognised by its characteristic hopping motion when it walks. It is a very aggressive ant and its sting can cause severe local pain. Severe allergic reactions are much more common than is seen with more common bull ants.
    [Show full text]
  • 'Jack Jumper' Ant Venom by Mass Spectrometry
    Characterisation of Major Peptides in ‘Jack Jumper’ Ant Venom by Mass Spectrometry Noel W. Davies 1* , Michael D.Wiese 2 and Simon G. A. Brown 3 1. Central Science Laboratory University of Tasmania Private Bag 74 Hobart 7001 Tasmania, AUSTRALIA Fax: 61 3 6226 2494 Email: [email protected] 2. Department of Pharmacy Royal Hobart Hospital GPO Box 1061L Hobart, Tasmania 7001 Australia 3 Department of Emergency Medicine Royal Hobart Hospital GPO Box 1061L Hobart, Tasmania 7001 Australia * Corresponding author : Running title: ‘Jack Jumper’ ant venom peptides 1 Abstract: The jack jumper ant, Myrmecia pilosula , is endemic to South-Eastern Australia, where around 2.7% of the population has a history of systemic allergic reactions (anaphylaxis) to its venom. Previous work had indicated that there were several allergenic peptides derived from the cDNA Myr p 1, the major expressed allergenic product being a 56-residue peptide (Myr p 1 57 →112, "pilosulin 1", ~6052 Da). Another major allergen had been described as a 27 residue peptide derived from the cDNA Myr p 2 (Myr p 2 49 →75, "pilosulin 2", ~3212 Da), possibly existing as part of a disulfide complex. As a preliminary step in detailed stability studies of a pharmaceutical product used for venom immunotherapy, LC-MS and Edman sequencing analysis of venom collected from various locations by both electrical stimulation and venom sac dissection was undertaken. More than 50 peptides in the 4kDa to 9kDa range were detected in LC-MS analyses. A subsequence of Myr p 2 was found as part of the major peptide present in all samples; this was a bis- disulphide linked, antiparallel aligned heterodimer consisting of Myr p 2 49 →74, (des-Gly 27 -pilosulin 2, ~3155 Da) and a previously unreported peptide of ~2457 Da.
    [Show full text]
  • Picture As Pdf Download
    RESEARCH Causes of ant sting anaphylaxis in Australia: the Australian Ant Venom Allergy Study Simon G A Brown, Pauline van Eeden, Michael D Wiese, Raymond J Mullins, Graham O Solley, Robert Puy, Robert W Taylor and Robert J Heddle he prevalence of systemic allergy to ABSTRACT native ant stings in Australia is as high as 3% in areas where these Objective: To determine the Australian native ant species associated with ant sting T anaphylaxis, geographical distribution of allergic reactions, and feasibility of diagnostic insects are commonly encountered, such as Tasmania and regional Victoria.1,2 In one venom-specific IgE (sIgE) testing. large Tasmanian emergency department Design, setting and participants: Descriptive clinical, entomological and study, ant sting allergy was the most com- immunological study of Australians with a history of ant sting anaphylaxis, recruited in mon cause of anaphylaxis (30%), exceeding 2006–2007 through media exposure and referrals from allergy practices and emergency cases attributed to bees, wasps, antibiotics physicians nationwide. We interviewed participants, collected entomological or food.3 specimens, prepared reference venom extracts, and conducted serum sIgE testing Myrmecia pilosula (jack jumper ant [JJA]) against ant venom panels relevant to the species found in each geographical region. is theThe major Medical cause Journal of ant ofsting Australia anaphylaxis ISSN: Main outcome measures: Reaction causation attributed using a combination of ant 2 in Tasmania.0025-729X A 18double-blind, July 2011 195 randomised 2 69-73 identification and sIgE testing. placebo-controlled©The Medical Journaltrial has of Australiademonstrated 2011 Results: 376 participants reported 735 systemic reactions. Of 299 participants for whom the effectivenesswww.mja.com.au of JJA venom immuno- a cause was determined, 265 (89%; 95% CI, 84%–92%) had reacted clinically to Myrmecia therapyResearch (VIT) to reduce the risk of sting species and 34 (11%; 95% CI, 8%–16%) to green-head ant (Rhytidoponera metallica).
    [Show full text]
  • Venom Immunotherapy Guide
    ASCIA Venom Immunotherapy Guide Venom Immunotherapy A Guide for Clinical Immunology/Allergy Specialists This document supersedes information contained in the older 2014 ASCIA Allergen Immunotherapy Manual. It has been updated by the ASCIA Immunotherapy Working Party and extracted into this separate Guide. ASCIA Immunotherapy Working Party members are listed on the ASCIA website. ASCIA resources are based on published literature and expert review. ASCIA health professional document references are at www.allergy.org.au/hp/papers Abbreviations CCD Common carbohydrate determinants GMP Good manufacturing practice IDT Intradermal test IgE Immunoglobulin E IgG Immunoglobulin G JJA Jack Jumper Ant MCT Mast cell tryptase PBS Pharmaceutical Benefits Scheme, AU Pharmac Pharmaceutical Management Agency, NZ QOL Quality of life SCIT Subcutaneous immunotherapy sIgE (allergen) specific IgE SPT Skin prick test SR Systemic reactions TGA Therapeutic Goods Administration, AU VIT Venom immunotherapy CONTENTS 1. Aims of Venom Immunotherapy 2 2. Patient and Allergen Assessment and Selection 2 3. Indications 2 4. Contraindications and Precautions 3 5. Description of Insects and Stings 4 6. Diagnostic Assessment 5 7. Venom Cross Reactivity 6 8. Available Products 7 9. Efficacy and Outcomes 8 10. Treatment Setting and Follow-up 9 11. Templates 10 1 ASCIA Venom Immunotherapy Guide 1. AIMS OF VENOM IMMUNOTHERAPY (VIT) In most patients allergic to insect venom, VIT reduces, but does not eliminate, the risk of having systemic allergic reactions (anaphylaxis) to insect stings. The aims of VIT are therefore to: • Reduce the risk of anaphylaxis from venomous insect stings, thereby reducing risk of death or long term sequelae of anaphylaxis. • Reduce acute medical care due to anaphylaxis.
    [Show full text]
  • Jack Jumper Ant Allergies (ASCIA)
    Jack Jumper Ant allergy Allergic reactions to stinging ants are an important cause of anaphylaxis in Australia and the southern United States of America. Allergic reactions to the Jack Jumper ant (also known as the Jumper Ant, Hopper Ant) are a uniquely Australian problem, although other species such as the Green Ant of Queensland, and introduced South American Fire Ant also cause occasional allergic reactions. What is a Jack Jumper Ant? Most Australian native stinging ants are from the genus Myrmecia. This group is broadly subdivided into Jack Jumper ants and Bull Dog ants. Bull Dog ants are large, around 15-25 mm long, whereas Jack Jumper ants are generally 10 to 15mm long and often display jerky, jumping movements. Jack Jumper Ants are also known as Hopper Ants or Skipper Ants in South Australia. The Jack Jumper ant most frequently associated with allergic reactions is commonly known as the Jack Jumper ant, Jack Jumper or Jumping Jack. Jack Jumper ants have a black body and orange/brown jaws/pincers and limbs. Jack Jumper ants sting rather than bite Like bees and wasps, Jack Jumper ants do not bite. Rather, they grasp the victim in their jaws, then bend and sting them. Their sting is in the tail. They are aggressive, typically walk with a hopping motion, and can sometimes jump from surrounding vegetation. Jack Jumper ants have a widespread distribution Jack Jumper ants are found in Tasmania, Victoria, ACT, New South Wales (Snowy Mountains, Blue Mountains and coastal regions), South Australia (Adelaide Hills), and in some parts of Western Australia and Queensland.
    [Show full text]
  • Adverse Reactions to Ants Other Than Imported Fire Ants John H
    Adverse reactions to ants other than imported fire ants John H. Klotz, PhD*; Richard D. deShazo, MD†; Jacob L. Pinnas, MD‡; Austin M. Frishman, PhD§; Justin O. Schmidt, PhD¶; Daniel R. Suiter, PhDʈ; Gary W. Price, MD**; and Stephen A. Klotz, MD‡ Objective: To identify ants other than Solenopsis invicta and Solenopsis richteri reported to cause adverse reactions in humans. Data Sources: We conducted a literature review to identify reports of medical reactions to ants other than S invicta and S richteri. Our review of medical and entomological literature on stinging ants was generated from MEDLINE and FORMIS, respectively, using the key words stinging ants and ant stings. The search was limited to articles in English published from 1966 to 2004 on MEDLINE and all years on FORMIS. We also present 3 new case reports of severe reactions to stings by 2 different species of ants, Pseudomyrmex ejectus and Hypoponera punctatissima. Study Selection: Articles that concerned anaphylactic (IgE-mediated) or anaphylactic-like (resembling anaphylaxis but mechanism unknown) immediate reactions to ant stings or bites were included in this review. Results: Taken together, our data demonstrate that S invicta and S richteri are not alone in their capability to cause serious allergic or adverse reactions. A diverse array of ant species belonging to 6 different subfamilies (Formicinae, Myrmeciinae, Ponerinae, Ectatomminae, Myrmicinae, and Pseudomyrmecinae) and 10 genera (Solenopsis, Formica, Myrmecia, Tetramorium, Pogonomyrmex, Pachycondyla, Odontomachus, Rhytidoponera, Pseudomyrmex, and Hypoponera) have now been shown to have this capability. Conclusion: Awareness that species other than imported fire ants may cause severe reactions should lead to more rapid evaluation and treatment and further investigation of the medical entomology of these ants.
    [Show full text]
  • Jack Jumper Ant Allergy
    Jack Jumper Ant allergy Allergic reactions to stinging ants are an important cause of anaphylaxis in Australia and the southern United States of America. Allergic reactions to the Jack Jumper ant (also known as the Jumper Ant, Hopper Ant) are a uniquely Australian problem, although other species such as the Green Ant of Queensland and the introduced South American Fire Ant can also cause allergic reactions. What is a Jack Jumper Ant? Most Australian native stinging ants are from the genus Myrmecia. This group is broadly subdivided into Jack Jumper ants and Bull Dog ants. Bull Dog ants are large, around 15-25 mm long, whereas Jack Jumper ants are generally 10 to 15mm long and often display jerky, jumping movements. The Jack Jumper ant most frequently associated with allergic reactions is commonly known as the Jack Jumper ant, Jack Jumper or Jumping Jack. Jack Jumper ants have a black body and orange/brown jaws/pincers and limbs. Jack Jumper Ants are also known as Hopper Ants or Skipper Ants in South Australia. Jack Jumper ants sting rather than bite Like bees and wasps, Jack Jumper ants do not bite. Rather, they grasp the victim in their jaws, then bend and sting them. Their sting is in the tail. They are aggressive, typically walk with a hopping motion, and can sometimes jump from surrounding vegetation. Jack Jumper ants have a widespread distribution Jack Jumper ants are found in Tasmania, Victoria, ACT, New South Wales (Snowy Mountains, Blue Mountains and coastal regions), South Australia (Adelaide Hills), and in some parts of Western Australia and Queensland.
    [Show full text]
  • Selected Topics: Toxicology
    ARTICLE IN PRESS The Journal of Emergency Medicine, Vol. xx, No. xx, pp. xxx, 2007 Copyright © 2007 Elsevier Inc. Printed in the USA. All rights reserved 0736-4679/07 $–see front matter doi:10.1016/j.jemermed.2007.06.018 Selected Topics: Toxicology ANIMAL BITES AND STINGS WITH ANAPHYLACTIC POTENTIAL John H. Klotz, PHD,* Stephen A. Klotz, MD,† and Jacob L. Pinnas, MD† *Department of Entomology, University of California, Riverside, Riverside, California and †Department of Medicine, University of Arizona School of Medicine, Tucson, Arizona Reprint Address: John H. Klotz, PHD, Department of Entomology, University of California, Riverside, CA 92521 e Abstract—Anaphylaxis to animal bites and stings poses INTRODUCTION a significant medical risk of vascular or respiratory reac- tions that vary according to the patient’s response and Historical Perspective and Definition nature of the insult. Emergency Physicians frequently see patients who complain of an allergic reaction to an animal bite or sting. Although Hymenoptera stings, specifically Anaphylaxis, meaning “without protection,” was coined those of wasps, bees, and hornets, account for the majority in the early 1900s by Richet, who, with Portier, dis- of these cases, other invertebrates and vertebrates are ca- covered the phenomenon while conducting experi- pable of causing allergic reactions and anaphylaxis. Many ments on venom from the Portuguese man-of-war and of the causative animals are quite unusual, and their bites sea anemone. They exposed dogs to small doses of and stings are not commonly appreciated as potential venom and then, several weeks later, repeated the causes of anaphylaxis. We conducted a literature review to injection on these healthy dogs.
    [Show full text]
  • Ants with Attitude: Australian Jack-Jumpers of the Myrmecia Pilosula Species Complex, with Descriptions of Four New Species (Hymenoptera: Formicidae: Myrmeciinae)
    Zootaxa 3911 (4): 493–520 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2015 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3911.4.2 http://zoobank.org/urn:lsid:zoobank.org:pub:EDF9E69E-7898-4CF8-B447-EFF646FE3B44 Ants with Attitude: Australian Jack-jumpers of the Myrmecia pilosula species complex, with descriptions of four new species (Hymenoptera: Formicidae: Myrmeciinae) ROBERT W. TAYLOR Research School of Biology, Australian National University, Canberra, ACT 0200. Honorary Fellow, Australian National Insect Collection, CSIRO Ecosystem Sciences, Canberra. E-mail: [email protected] Abstract The six known “Jack-jumper species Myrmecia pilosula Fr. Smith 1858, M. croslandi Taylor 1991, M. banksi, M. haskin- sorum, M. imaii and M. impaternata spp.n. are reviewed, illustrated and keyed. Myrmecia imaii is known only from south- west Western Australia, the others variously from southeastern Australia and Tasmania. These taxa were previously confused under the name M. pilosula (for which a lectotype is designated). Previous cytogenetical findings, which con- tributed importantly to current taxonomic understanding, are summarized for each species. Eastern and Western geograph- ical races of the widespread M. pilosula are recognized. Myrmecia croslandi is one of only two eukaryote animals known to possess a single pair of chromosomes (2n=2 3 or 4). Myrmecia impaternata is evidentially an allodiploid (n=5 or 14, 2n=19) sperm-dependent gynogenetic hybrid between M. banksi and an element of the eastern race of M. pilosula, or their immediate ancestry. The sting-injected venom of these ants can induce sometimes fatal anaphylaxis in sensitive humans.
    [Show full text]
  • The Biochemical Toxin Arsenal from Ant Venoms
    toxins Review The Biochemical Toxin Arsenal from Ant Venoms Axel Touchard 1,2,*,†, Samira R. Aili 3,†, Eduardo Gonçalves Paterson Fox 4, Pierre Escoubas 5, Jérôme Orivel 1, Graham M. Nicholson 3 and Alain Dejean 1,6 Received: 22 December 2015; Accepted: 8 January 2016; Published: 20 January 2016 Academic Editor: Glenn F. King 1 CNRS, UMR Écologie des Forêts de Guyane (AgroParisTech, CIRAD, CNRS, INRA, Université de Guyane, Université des Antilles), Campus Agronomique, BP 316, Kourou Cedex 97379, France; [email protected] (J.O.); [email protected] (A.D.) 2 BTSB (Biochimie et Toxicologie des Substances Bioactives) Université de Champollion, Place de Verdun, Albi 81012, France 3 Neurotoxin Research Group, School of Medical & Molecular Biosciences, University of Technology Sydney, Broadway, Sydney, NSW 2007, Australia; [email protected] (S.R.A.); [email protected] (G.M.N.) 4 Red Imported Fire Ant Research Center, South China Agricultural University, Guangzhou 510642, China; [email protected] 5 VenomeTech, 473 Route des Dolines—Villa 3, Valbonne 06560, France; [email protected] 6 Laboratoire Écologie Fonctionnelle et Environnement, 118 Route de Narbonne, Toulouse 31062, France * Correspondence: [email protected]; Tel.: +33-5-6348-1997; Fax: +33-5-6348-6432 † These authors contributed equally to this work. Abstract: Ants (Formicidae) represent a taxonomically diverse group of hymenopterans with over 13,000 extant species, the majority of which inject or spray secretions from a venom gland. The evolutionary success of ants is mostly due to their unique eusociality that has permitted them to develop complex collaborative strategies, partly involving their venom secretions, to defend their nest against predators, microbial pathogens, ant competitors, and to hunt prey.
    [Show full text]
  • Ant Allergens and Hypersensitivity Reactions in Response to Ant Stings
    Review article Ant allergens and hypersensitivity reactions in response to ant stings Rutcharin Potiwat1 and Raweerat Sitcharungsi2 Summary Keywords: Allergy, ant stings, hypersensitivity, immunotherapy, treatment Hypersensitivity reactions caused by ant stings are increasingly recognized as an important Introduction cause of death by anaphylaxis. Only some species Ants are insects and belong to the order of ants ( e.g. Solenopsis spp., Myrmecia spp., and Hymenoptera and the family Formicidae. There are Pachycondyla spp.) cause allergic reactions. Ant currently more than 12,500 ant species known. species are identified by evaluating the morphologic Although some species of ants can bite and sting structures of worker ants or by molecular humans, only some ant genera, such as Solenopsis, techniques. Ant venom contains substances, especially S. invicta and S. ricteri (commonly known as including acids and alkaloids, that cause toxic imported fire ants), cause life-threatening allergic reactions, and those from Solenopsis invicta or reactions. Ant hypersensitivity is one of the most the imported fire ant have been widely studied. important causes of severe systemic reactions or Piperidine alkaloids and low protein contents can anaphylaxis with reports of fatalities from ant cause local reactions (sterile pustules) and anaphylaxis occurring worldwide in both urban and systemic reactions (anaphylaxis). Imported fire rural areas. The diagnosis of ant hypersensitivity can ant venoms are cross-reactive; for example, the be performed by allergic history and physical Sol i 1 allergen from S. invicta has cross- examination of the ant sting, or by in vivo and in reactivity with yellow jacket phospholipase. The vitro tests. The management of ant hypersensitivity Sol i 3 allergen is a member of the antigen 5 can be divided into immediate treatment for family that has amino acid sequence identity with anaphylaxis, and preventive treatment.
    [Show full text]
  • Allergic Reactions to Bites and Stings
    Allergic reactions to bites and stings Most insect bites and stings result in a localised itch and swelling that settles within a few days. Severe allergic reactions (anaphylaxis) to insects are usually due to bees, wasps or the Australian Jack Jumper ant. Insect bites are a less common cause of anaphylaxis than insect stings. Fortunately, effective treatments are available to treat allergic reactions to bites and stings. Stinging insects are a common cause of anaphylaxis Allergies to venoms from stinging insects (bees, wasps and ants) are one of the most common causes of severe allergic reactions (anaphylaxis) in Australia. Symptoms include an all over rash, swelling of tongue or throat, trouble breathing, abdominal pain, diarrhoea, vomiting or a drop in blood pressure (shock). • Although stinging insects belong to order of hymenoptera (which means membranous winged insects), their venoms are very different. Allergy to one type of stinging insect does not usually increase the risk of an allergic reaction to another. • The Honey Bee is the most common cause of allergic reactions to insects in Australia. • Paper Wasps and European Wasps can sting multiple times. Although the more familiar Paper Wasp is responsible for the majority of serious stings, the European Wasp is becoming an increasing problem in Australia. It is particularly aggressive and likes to get inside drink cans at barbeques. • The major cause of anaphylaxis from ant stings is the Australian Jack Jumper ant (Myrmecia pilosula), a medium sized black bull ant most prevalent down the eastern side of Australia, Tasmania and South Australia. It can be recognised by its characteristic hopping motion when it walks.
    [Show full text]