Cases reported "Dermatitis, Occupational"

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1/8. urticaria and rhinitis to shrubs of ficus benjamina and breadfruit in a banana-allergic road worker: evidence for a cross-sensitization between Moracea, banana and latex.

    BACKGROUND: We report the case of a road worker with a food allergy to banana, who developed urticaria and rhinitis when cutting shrubs of ficus benjamina and breadfruit. He did not develop an allergy to latex of hevea brasiliensis. RESULTS: Sensitization to latex of F. benjamina, H. brasiliensis, breadfruit and banana was demonstrated using skin tests and specific IgE measurements. RAST inhibitions procedures showed that specific IgE to breadfruit latex cross-reacted more strongly with latex of H. brasiliensis and banana than with latex of F. benjamina with the same extract. CONCLUSION: Given the wide distribution of Moracea trees in tropical regions, sensitization to latex of H. brasiliensis and banana could be a consequence of sensitization to Moracea members; F. benjamina does not seem to be the only Moracea responsible for cross-allergy with latex and fruit. Consequently, it seems interesting to test other members of the Moracea family in patients sensitized to latex of H. brasiliensis and banana. Sensitization to breadfruit could be a risk factor for sensitization to latex of H. brasiliensis.
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2/8. Occupational allergic contact urticaria to yucca (yucca aloifolia), weeping fig (ficus benjamina), and spathe flower (Spathiphyllum wallisii).

    BACKGROUND: Occupational contact urticaria (CU) from plants is often reported, but it is less often attributed to decorative houseplants. We present an atopic gardener and caretaker of plants who developed CU when occupationally exposed to weeping fig, spathe flower, and yucca. methods: Sensitization was evaluated by skin prick tests (SPT) and analyses for IgE antibodies. RESULTS: SPT were positive to all three plants, and IgE antibodies were found to weeping fig and spathe flower. SPT were also performed with several decorative houseplants in more than 600 patients. Positive SPT was found to weeping fig (12%), African milk tree (8.3%), yucca (5.8%), Chinese rose (4.7%), massangana (4.6%), bird's nest fern (3.2%), and spathe flower (3.2%). CONCLUSION: Our study indicates that SPT and tests for IgE antibody are useful in detecting occupational CU caused by houseplants.
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3/8. Contact dermatitis from radiata pine.

    Sawdust from radiata pine trees which are grown extensively throughout south australia causes various forms of contact dermatitis. The various forms are described in nine cases which illustrate that the early diagnosis of industrial dermatitis is necessary to prevent the condition from becoming chronic. A chance association between colophony in radiata pine sawdust and colophony in adhesive plaster, which caused contact dermatitis when used in patch testing, led to the discovery of these cases.
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4/8. Occupational allergic contact dermatitis from lichens in present-day finland.

    lichens are abundant in forests, living on trees, soil, stones and rocks. They contain usnic acid and other lichen acids that are contact allergens. lichens and liverworts cause woodcutter's dermatitis, eczema that appears in the forest on the bare skin areas, especially in cold and wet weather. Occupational allergic contact dermatitis from lichens occurs in forestry and horticultural workers and in lichen pickers. lichens can cause immediate allergy, contact urticaria, rhinitis and asthma and probably also photoallergic contact dermatitis. lichens are used for the manufacture of oak moss absolute, a fragrance constituent. Oak moss absolute contains lichen acids and is one of the commonest contact allergens. Lichen acid allergy develops either from contact with lichens or from fragrances. We describe 4 cases of occupational allergic contact dermatitis from lichens during the past decade: 2 were farmers and 2 gardeners. 3 of them had allergic reactions to fragrance mix and oak moss absolute. Lichen contact allergy is an old, partly forgotten, syndrome that should be remembered for symptoms in contact with barked wood or wood dust.
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5/8. Allergic contact dermatitis from salicyl alcohol and salicylaldehyde in aspen bark (populus tremula).

    Salicyl alcohol or 2-methylolphenol is a well-known allergen in phenol-formaldehyde resins and a strong sensitizer in guinea pigs. There is 1 previous report of allergic contact dermatitis from salicyl alcohol in aspen bark. We describe a second case with concomitant allergy to salicylaldehyde. An elk researcher who had handled leaves from various trees presented with eczema of the hands, face, flexures, trunk and extremities. Patch testing showed sensitivity to salicyl alcohol, salicylaldehyde, balsam of peru (myroxylon pereirae resin), aspen wood dust and an extract prepared from the bark of aspen (populus tremula). Weaker reactions were observed to bark extracts of rowan (sorbus aucuparia), tea-leaved willow (salix phylicifolia) and goat willow (salix caprea). We analysed salicyl alcohol and salicylaldehyde in the bark extracts and found the 2 chemicals in equal amounts, about 0.9 microg/mg in aspen bark and in lower concentrations in rowan and the willows. We did not find either of the chemicals in the test substance of balsam of peru (myroxylon pereirae). Besides salicyl alcohol, salicylaldehyde is also recommended to be used to screen for contact allergy to aspen. Both of these chemicals should be tested in forest workers in areas where aspen is growing.
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6/8. asthma and other symptoms in cinnamon workers.

    Cinnamon, which is the bark of the cinnamomum zeylanicum tree, contains cinnamic aldehyde, which is an irritant. Workers processing cinnamon before export are exposed to much cinnamon dust. Forty such workers with an average of four years' service in the industry were examined. Thirty five workers (87.5%) had symptoms, nine having had asthma (22.5%). Other symptoms, probably related to the irritant nature of cinnamon dust, were irritation of skin (50%), loss of hair (37.5%), and smarting of eyes while at work (22.5%). Loss of weight (65%) was the commonest finding. Contact dermatitis which has previously been described was not found in any of the workers.
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7/8. A study of dermatitis in the lacquerware industry.

    Contact dermatitis from lacquer has been documented. The causative agent is a resin from a lacquer tree that can induce either irritation or sensitization. Thai and Japanese lacquer trees are 2 distinct species but are both members of the anacardiaceae family. We report 3 cases of contact dermatitis from Thai lacquer resin. observation and study of the lacquer plantation and working process at the factory were made to elucidate the aetiology of the dermatitis.
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8/8. latex allergy update: four vignettes.

    Four vignettes of occupational natural rubber latex (NRL) allergy are presented. Each had contact urticaria, 2 of 4 had systemic symptoms, 3 were allergic to cross-reacting fruit, and 2 had pollen and tree allergy. Recent information on latex cross-reactivity with fruit and pollen is discussed along with an update on latex radioallergosorbent tests and control of NRL allergy.
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