Manuela Pecegueiro

Contact dermatitis to Disperse Blue 106

9 patients with typical textile dermatitis were found to be allergic to dark polyester blouses. Thin‐layer chromatography of the dyes extracted from the fabrics identified the presence of several dyes, from which Disperse Blue 106 was positive in all patients.

Contact allergy to gold sodium thiosulfate: A comparative study

During 1995, we added gold sodium thiosulfate and potassium dicyanoaurate to the patch test standard series. Our purpose was to compare the reactivity of the gold salts, to determine the frequency of contact allergy to gold in our country, to compare our results with those of the Malmö group and, finally, to try to clarify the clinical relevance. 2853 patients were routinely tested and 168 patients answered a questionnaire similar to that used by the Malmö group. Contact allergy to gold was found in 23 patients; all women: 22 to gold sodium thiosulfate (0.78%). only 1 to potassium dicyanoaurate and 2 to both salts. All reactors had their ears pierced and were exposed to gold jewellery (mainly earrings). Simultaneous allergies to nickel and cobalt were statistically significant in patients with positive patch tests to gold sodium thiosulfate. Atopy was no more common among these patients.

Contact dermatitis to Hirudoid® cream

31 patients allergic to Hirudoid® cream were patch tested with the ingredients. 29 were allergic to the cream base and 16 to one or more components. The most common allergens were myristyl alcohol, cetostearyl alcohol and parabens.