màj:
14-Mar-2006
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Mise-à-jour |
rev. oct/2002 evidence-based analysis rely upon
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search AsmaPro
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Asmapro available on CD-rom :This Asmanet Web service is under construction, with a CD for off-line usage. Medline abstracts have been added to the CD off-line version in order to have them without an Internet web access. The service is available for Mac & PC in French and in English. The AsthmaPro version uses Metacard and is very handy thanks to its excellent integrated search engine - the HTML version uses Google as an off-shore search engine, which implies then a web online access - april2003); CD can be obtained free of charge for eligible people (limited stocks); just send your request and professionnal data to Mr L. Mousseau (Phadia). You may also write to Croisix who shall forward your request whenever eligible. |
Jobs/Métiers |
Agents |
Acarus farris, Acarus siro, Blomia Kulagini, Dermatophagoides pteronyssinus, Euroglyphus Maynei, Glycyphagus domesticus, Leptidoglyphus destructor, Tyrophagus putrescentiae |
Incidence |
Conditions |
Symptom |
Incidence: dependent on co-factors: smoking, atopy and a predisposition to bronchial hyperreactivity. Non-atopic subjects may also be affected. IgE-dependent mechanism |
The degree of humidity in the cereal before storage favours multiplication of mites: proper ventilation is therefore important. In the food industry, certain types of mites (storage mites) may contaminate foodstuffs : cheese (Acarus Siro, Blomia Kulagini), chorizo (Euroglyphus Maynei), garlic and Ham (Tyrophagus Putrescentiae and Acarus Siro). The response to TDI is regulated by the MHC class II loci DQA1 and DQB1. |
Rhinitis and asthma symptoms are concomitant and persist after work has stopped. |
Diagnostic |
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References |
Skin prick test for various species of mite for which extracts are commercially available. Immunological dosage: RAST/CAP RAST. Bronchial provocation tests (in Hospital) reveal both
immediate and delayed reactions. |
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Allergy 1999,54:884 - Alvarez MJ. et al. |
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Jobs/Métiers |
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Incidence |
Conditions |
Symptom |
Incidence: strongly associated with atopic subjects. In the case of allergy to henna and sercine, an IgE-dependent mechanism has been identified. However, for ammonium thioglycolate (setting agent) the mechanism remains to be determined. An hypersensitive pulmonary disorder may arise in some subjects using synthetic hair lacquer resins. Persulphates constitute a major irritant. Skin tests with persulphates have been inconclusive and a specific form of IgE has never been demonstrated. They act as direct histamine liberators in vitro. |
The combination of exposure to irritants and allergens in a work place which is typically poorly ventilated, without extractor fan, is the main source of the problem. The persulfates which are used in bleaching have been proved statistically to be the major cause. In factories producing persulfates, it has been shown that ambient levels below 1 mg per m2 of air protects against sensitization. |
The first symptom is rhinitis which occurs within minutes of contact. Classic asthma linked to work is often also present. Urticaria and facial oedema are common symptoms and eczema has also been reported. Eczema on the hands is also very common. |
Diagnostic |
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References |
Skin tests: henna and sericin. Immunological assay: RAST sericin. Tests must be conducted in Hospital (powders may be dangerous when mixed). Delayed reactions are possible with bronchial provocation test. Skin tests are positive in 24% of cases. Bronchial hyperreactivity exists in 58% of cases and BPT is only present in 22%. ( Schwaiblmair et al). Comparison of tryptase and ECP levels before and after bronchial provocation tests is an additional possibility in aetiological diagnosis. |
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Allergy Asthma Proc. 2001,22:235 - Galaortiz G. et al. |
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Incidence |
Conditions |
Symptom |
Incidence: Approximately 5% of exposed subjects. Isocyanates are direct irritants to the respiratory tract. Their toxicity can result in fatality. Atopy does not play a predisposing role. Immunological mechanisms involving the anti-bodies IgE and IgG have been demonstrated. Other mechanisms involving bronchial beta-receptors or the inhibition of cholinesterase have also been suggested. Bronchial response can be either immediate or delayed. Sensitized subjects may be intolerant to cruciferae. In the case of painters, sensitization results from mixtures of products (eczema may occur). |
Sensitization: plastics (TDI and MDI), car paints (HDI and IPDI), polyurethanes (TDI), casting/melts and glues (MDI). Exposure; purely via the airways, may induce cutaneous sensitisation even in the absence of any contact with the skin. Isocyanate induced asthma (particularly TDI) is characterized by lymphocyte activation and secretion of pro-inflammatory cytokines. After exposure has ceased, a "remodelling" of the airways persists. The realisation of the problems associated with TDI, MDI and HDI, etc has led the industries to use oligomers with high molecular weights (BIC) with the aims of reducing the risks of sensitization. The norms for tolerable levels of these monomers are not sufficient to prevent work-related asthma. No norms have been fixed for polyisocyanates or polymer precursors. The response to TDI is regulated by the MHC class II loci DQA1 and DQB1. Fire retardants contain polyurethanes. A Swedish study performed in 2001 demonstrated that above 300 °C these polyurethanes degrade with the liberation of isocyanate-containing compounds (TDIs and monomers of TDI).. |
Asthma develops fairly quickly, however it is marked by its severity and persistence once established. Improvement is only observed several weeks after exposure to the risk has ceased. Asthma and hypersensitive lung disorders have been reported following exposure to polymer. As well as the classical clinical symptoms, myalgia, arthralgia and nausea have been reported (in approximativly 26% of cases). Toxic reactions can occur (0.5 ppm). One fatal case at the workplace has been reported following exposure to MDI in a pre-sensitized subject. Bronchial hyperreactivity often persists even after exposure has ceased. TGIC often results in contact skin dermatitis. |
Diagnostic |
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References |
Skin prick test: 5mg/ml TDI-HSA, 3.4mg/ml TM-HSA (Na salt of TMA 1/200); these tests are no longer in widespread use. Immunological dosage: RAST/CAP RAST TDI, MDI and HDI. Bronchial provocation test (in Hospital). |
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Am. J. Ind. Med. 2001,39:587 - Redlich CA. et al. |
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Jobs/Métiers |
Agents |
Incidence |
Conditions |
Symptom |
Incidence: low. Atopy does not play a role. IgE-dependent mechanism. |
Sensitization occurs during the production and use of milk powder in various food industries. |
Asthma, rhinitis and conjunctivitis. Asthma starts as nocturnal asthma, but becomes persistent. |
Diagnostic |
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References |
Skin prick test using betalactoglobulin. Immunological assay: RAST/CAP RAST betalactoglobulin and some antibiotics. Bronchial provocation test (in Hospital). |
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Rev. Fr.
Allergol. 1984, 24:93; |
Jobs/Métiers |
Agents |
Incidence |
Conditions |
Symptom |
Incidence: very common in the Portuguese cork making industry. Atopic subjects readily contract asthma whereas non atopic subjects immediately develop alveolitis. In Portuguese studies, 98% of subjects affected had precipitins compared to 7% of healthy subjects. Cork itself does not play an important role. |
All types of work involving the use of cork in hot and humid places may result in exposure to the moulds responsible for the symptoms.(often Penicillium strains) |
Asthma and feverish pulmonary disorders follow each other and are associated with unstable pulmonary infiltrates. |
Diagnostic |
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References |
Skin tests with moulds are possible in principle. The link between precipitins for corks, clinical indices and measurements of respiratory function enables diagnosis to be made. In 2001, a Portuguese study which assessed peak expiratory flow rates at the workplace, suggested that occupational asthma may develop in cork workers, in the absence of alveolitis. |
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J. Asthma 2001,38:357 - Winck J.C et al. |
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Jobs/Métiers |
Agents |
Condom manufacturing industry, Cosmetics industry, Dentist, Fireworks manufacturer, Pharmaceutical industry |
Incidence |
Conditions |
Symptom |
Incidence: dependent upon the number of atopic subjects in the work place. IgE-dependent mechanism. Lycopodium powder is used in a large number of industries, therefore many workers may be affected. Recently, it has been widely used as a powder covering for latex items. The incidence is higher for rhino-conjunctivitis than for asthma. |
Lycopodium powder (lycopodium clavatus) is derived from plant spores. In factories manufacturing condoms, those at highest risk are in the packaging area. |
Rhinitis, conjunctivitis and asthma occur linked to work; they are typical allergic reactions. |
Diagnostic |
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References |
Skin tests: by scarification (in the past). Currently, patch tests with Finn chambers are routinely used. The intensity of the response to these tests is not correlated with the clinical symptoms, whether these be bronchial or ENT.. Immunological assay: RAST/CAP RAST lycopodium . Bronchial provocation test (in Hospital). |
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Allergy 2000,55:836 Rask-Andersen A. et al. |
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Jobs/Métiers |
Agents |
Animal breeder, Doctor, Medical personnel, Pharmaceutical industry, Veterinary surgeon |
Incidence |
Conditions |
Symptom |
Incidence: low. No atopic predisposition. IgE-dependent mechanism. Macrolids are a class of reagents that act like haptens. Possibility of an antigenic cross reaction with lincomycin. |
Sensitization caused during the manufacture and handling of these chemical compounds. |
Conjunctivitis, rhinitis and asthma. Contact eczema may also be encountered. |
Diagnostic |
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References |
Incidence: low. No atopic predisposition. IgE-dependent mechanism. Macrolids are a class of reagents that act like haptens. Possibility of an antigenic cross reaction with lincomycin. |
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Contact Dermatitis 1980,6:410 |
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Jobs/Métiers |
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Incidence |
Conditions |
Symptom |
Incidence: 5 to 16% of exposed subjects. Neighbours up to 500m away may also be affected. Atopy probably has an influence. IgE-dependent mechanism. The allergen is a protein contained in the root. |
Powder extracted from the crushed root of a plant called "the devils tongue" which is used in Japanese cooking to make konnyaku. |
Asthma in young adults. Sensitization may take up to three years. |
Diagnostic |
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References |
Skin tests are possible. No immunological assay (allergen not commercially available). Bronchial provocation test (in Hospital). |
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Allergology Amsterdam, 1979, Excerpta Medica Ed. |
Jobs/Métiers |
Agents |
Animal foodstuffs industry , Conserved food industry, Cook, Fishermen, Fishmonger, Food industry, Oyster sheller, Shellfish workers |
Anisakis simplex, Ascidie, Caviar, Clam, Coral, Crab, Daphnia, Fish, Lobster, Prawn, Salmon, Sea squirt, shrimp, Scallops |
Incidence |
Conditions |
Symptom |
Incidence: very high in certain areas e.g. 15.6% of exposed subjects in Canada. It is equally linked with work and the causative allergen: fish, prawn, crab. Control of occupational exposure is important: epidermics of asthma caused by prawns have been described. IgE-dependent mechanism with type III reactions in the case of alveolitis. Sensitisation may also occur due to inhalation of cooking vapours containing particles of the allergen. |
The expansion of aquaculture has increased the risk and number of cases of this occupational disease. Sensitisations may occur independently to one or more sea-food. Recently, the demonstration that a single common stable antigen exists in both prawns and scallops has increased the problem, since this allergen is a tropomyosin, identical to that which is found in squid, dust mites and snails. The antigen is a protein of 35 – 39 kDa. Anisakis simplex is a parasitic nematode found in fish and crustaceans, whose pathogenic role is well known amongst fish eaters. Inhalation of cooking vapours from contaminated fish may make Anisakis simplex into an occupational allergen. Fishers of Japanese langoustines develop urticaria, asthma and conjunctivitis to the coral (Dendronepthya nipponica) which they encounter during their work. |
Typical allergic asthma, associated with rhinitis, conjunctivitis and work. Cases of alveolitis have been reported. Food allergies may develop to these products. Anisakis may cause generalized urticaria. |
Diagnostic |
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References |
Skin tests: IDR and skin prick tests for those allergens which are commercially available. Immunological assay: RAST/CAP RAST fish, crab, prawn, lobster and RAST for daphnia . Bronchial provocation test (in hospital). Due to the tropomyosin, cross-reactivities exist between Anisakis, other nematodes and dust mites. Coral allergens have been described, and skin tests and IgE measurements have been performed on an experimental basis. |
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Eur. J. Dermatol. 2001,11:249 - Scala E. et al. |
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Jobs/Métiers |
Agents |
Incidence |
Conditions |
Symptom |
Incidence; low. Atopy does not play an important role. IgE-dependent mechanism. |
Disinfection of walls in offices, in particular in hospitals. |
Asthma and rhinitis at the end of the working day and following night, associated with urticaria and/or angioneurotic oedema. |
Diagnostic |
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References |
Skin prick test with a 1% solution of the agent. Bronchial provocation test (in Hospital) by inhalation of aerosol. No immunological assay has been reported. |
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American Journ. of Med.1968, 44:310 |
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