1/5. Occupational allergic contact dermatitis caused by thiourea compounds.thiourea compounds are mainly used as accelerators in the rubber industry, but also in other industries, e.g., as antioxidants in the graphics industry. thiourea compounds may provoke allergic contact dermatitis, although the number of reported cases is relatively low. During 1985-1991, we had 5 patients with allergic patch test reactions caused by thiourea compounds. 1 of our patients had to use a knee brace after an occupational accident. He developed allergic contact dermatitis caused by the knee brace, probably because he had become sensitized to diethylthiourea. 2 patients were probably sensitized by diphenylthiourea in neoprene gloves. A florist had an allergic patch test reaction to diphenylthiourea and might have been sensitized by fungicides or pesticides, which break down into thioureas. It is often difficult, however, to detect the source of thiourea compound sensitization. If the patient has contact dermatitis and has been exposed to products that may contain thiourea compounds (or compounds that break down into thiourea compounds), such as rubber, PVC plastic or adhesive, diazo paper, paints or glue remover, anticorrosive agents, fungicides or pesticides, patch testing with a series of thiourea compounds needs to be performed. If patch testing with thiourea compounds is not performed, allergic contact dermatitis caused by thiourea compounds is not likely to be diagnosed.- - - - - - - - - - ranking = 1keywords = pesticide (Clic here for more details about this article) |
2/5. skin reactions to pesticides.skin disease is the second most common type of occupational illness. This chapter reviews the important concepts in pesticide-related dermatoses, first by examining two case studies and then by describing the major fungicides, insectides, herbicides, and fumigants associated with skin disease.- - - - - - - - - - ranking = 2.5keywords = pesticide (Clic here for more details about this article) |
3/5. Contact dermatitis caused by sesquiterpene lactones.BACKGROUND: Compositae dermatitis involves workers such as gardeners, florists, and farmers, and less commonly people not employed in occupations at risk. OBJECTIVE: To report a case of contact sensitization caused by Compositae, the source of sensitization being both pesticides and plants. methods: A 65-year-old man, whose hobby was gardening, was affected by a chronic eczema of the face and the hands for 6 months that reoccurred after using fertilizers and handling plants. patch tests with the International Contact dermatitis research Group standard series, the plants series and pesticides series (Hermal Trolab) were performed. RESULTS: We found the following positive reactions at day 2 and day 3: sesquiterpene lactone mix, 0.1% in petrolatum; arnica tincture, 20% in petrolatum; pyrethrum, 2% in petrolatum; captafol, 0.1% in petrolatum. CONCLUSION: Pyrethrum and its derivatives are made from Compositae plants; the arnica tincture is obtained from arnica montana, which is also a member of the Compositae family. In our patient, the clinical manifestations were certainly caused by the exposure to sesquiterpene lactones, confirmed by the positive patch test to sesquiterpene lactone mix.- - - - - - - - - - ranking = 1keywords = pesticide (Clic here for more details about this article) |
4/5. Contact pemphigus induced by dihydrodiphenyltrichlorethane.We describe a case of contact pemphigus, a new subgroup of induced pemphigus. The disease is provoked by a chlorinated hydrocarbon pesticide: dihydrodiphenyltrichlorethane. We suspect that systemic absorption after the topical contact is responsible for the alteration of skin structure and activation of immunological mechanisms leading to blister formation and acantholysis.- - - - - - - - - - ranking = 0.5keywords = pesticide (Clic here for more details about this article) |
5/5. Allergic contact and photoallergic contact dermatitis to plant and pesticide allergens.BACKGROUND: The panel of patch test allergens used for the evaluation of patients with suspected photoallergy typically does not include plant and pesticide allergens. The prevalence of allergic contact dermatitis and photoallergic contact dermatitis to plant and pesticide allergens was determined for this subgroup of patients. observation: Positive reactions were detected in 12 of 26 patients who were tested with our photoallergen series: 5 with allergic contact dermatitis, 5 with photoallergic contact dermatitis, and 2 with both. Four of the 12 patients had positive patch and photo-patch test reactions to plant allergens, pesticide allergens, or both. The positive patch test reactions were to the plants taraxacum officinale (dandelion) and tanacetum vulgare (tansy) and to the pesticides folpet and captafol. Positive photo-patch test reactions were to the pesticides folpet and captan. The histories of the patients suggested that 2 or 3 of the 4 patients had clinically relevant reactions. In the other 8 patients, positive reactions to the patch and photo-patch tests included fragrances, sunscreens, and antibacterial agents. CONCLUSION: Plant and pesticide allergens should be included in the patch and photo-patch test series used for the evaluation of patients with suspected photoallergy.- - - - - - - - - - ranking = 5keywords = pesticide (Clic here for more details about this article) |