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  • 1
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: There have been no previous reports of photosensitivity following photoallergy to airborne olaquindox in a large group. 15 pig breeders, with photo-distributed dermatitis related to olaquindox dust, were investigated lo study the nature, promoting factors, and course of this disease. Minimal erythema doses for UVA and UVB were established before photopatch testing and at intervals thereafter. AM patients presented with olaquindox-induced photoallergy. In 14 cases, this was followed by prolonged increased sensitivity to UVA, 7 patients also displayed an increased sensitivity to UVB. 13 farmers came into contact with olaquindox in mineral feed (1000 mg/kg) and only 2 in final feed (50 mg/kg). S patients avoided further contact with olaquindox because of warnings in the media. Allergies and photoallergies to other occupational substances preceded or followed olaquindox (photo)allergy. Because of their increased sensitivity to light, most of these farmers used sunscreens, and 2 of them developed (photo(allergy to UV-absorbers. As a result of our studies, we recommend photopatch testing for olaquindox in pig breeders with photo-distributed dermatitis. This would enable the early recognition of photoallergy to olaquindox and the prevention of persistent light reaction.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 39 (1998), S. 0 
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 37 (1997), S. 0 
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This review summarizes published and unpublished data of our 15-year experience with sunscreen allergy and photoallergy. From 1981–1996. 402 patients with suspected clinical photosensitivity were patch and photopatch tested with the commercial sunscreens and facial cosmetics (hat they had used and with chemical UV absorbers, fragrance materials, preservatives, and emollients. Mi patients (20%) (28 men, 52 women) demonstrated allergic and/or photoallergic contact dermatitis to 1 or more UV absorber(s). In 47 patients with photodermatoses or photo-aggravated dermatoses and in 33 subjects with normal photosensitivity, 91 allergic and 84 photoallergic reactions to UV filters were observed. Over the years sunscreens were added lo the test series, which since 1989 comprised the following 10 UV absorbers and which induced allergic (a) and photoallergic (pa) reactions (number, type of reaction); 4 UVA absorbers – isopropyldibenzoylmethane (30a/32pa); butyl methoxydibenzoyl-methane (15a/13pa); henzophenone-3 (3a/9pa): benzophenone-4 (0a/0pa); and 6 UVB absorbers – PABA (2a/2pa); octyl dimethyl PABA (1a/2pa); methylbenzylidene camphor (32a/5pa); octyl methoxycinnamate (3a/4pa); isoamyl p-methoxycinnamate (4a/10pa); and phenylbenzimidazole sulfonic acid (1a/7pa). The frequent (photo)sensitization to isopropyldibenzoylmethane was the reason that its production was discontinued in 1993. 47 patients reacted to fragrance materials, 11 to preservatives and 2 to lanolin alcohol. These constituents were contained in the commercial sunscreens and cosmetics that they had used. Continuous revision of the UV absorber photopatch test series was necessary to be closer to the real frequency of exposure and of reported I photo (allergy to newer sunscreens. Clinicians should consider contact and photocontact allergy, especially in patients with photodermatoses and photo-aggravated dermatoses and they should perform photopatch testing. Once the culprit has been identified, its INCI (International Nomenclature Cosmetic Ingredients) designation should be given to the patient, who must be warned to avoid products containing the (photo)allergen.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Erythrokeratodermien ; Kongenitale Ichthyosen ; Ultrastruktural ; Retinoide ; Key words Erythrokeratodermia ; Congenital ichthyoses ; Ultrastructur ; Retinoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A mother and her son presented with erythrokeratodermia progressiva symmetrica Darier-Gottron. Both patients developed symmetrical erythematous and hyperkeratotic plaques on the extremities and face at the age of 6 months. At the age of 2 1/2 years the son suffered from rapid progression of the disease to involve the entire skin. The disesase of his mother had shown a similar course, however, with spontaneous regression at the age of 10 years. The clinical features of this generalized condition were identical to congenital lamellar ichthyosis. Light microscopy was non-specific with orthohyperkeratosis, focal parakeratosis and acanthosis. Electron microscopy revealed numerous keratinosomes in the stratum granulosum, keratinosome-derived lamellae in the intercellular space and partly augmented keratohyalin with clumping. In the stratum spinosum short tonofilament bundles with clumping were remarkable. The child experienced a significant and persistent improvement with systemic retinoids. His mother´s disease was successfully controlled with intermittent retinoid therapy. With the clinical and ultrastructural criteria presently available, an unambiguous differentiation between erythrokeratodermia progressiva symmetrica, usually a localized disorder of keratinization, however with intermittent generalization, and other disorders of keratinization seems difficult.
    Notes: Zusammenfassung Wir berichten über Mutter und Sohn mit Erythrokeratodermia progressiva symmetrica Darier-Gottron. Beide Patienten entwickelten im Alter von 6 Monaten symmetrische erythematosquamöse Plaques an den Extremitäten und im Gesicht. Beim Sohn kam es mit 2 1/2 Jahren zu einer raschen Ausbreitung mit Befall des gesamten Integuments. Die Mutter berichtet über einen ähnlichen Verlauf, jedoch mit spontaner Regression ab dem 10. Lebensjahr. Die Klinik dieses generalisierten Zustandes war identisch mit dem Befund einer kongenitalen lamellären Ichthyose. Lichtmikroskopisch ergaben sich unspezifische Veränderungen mit Orthohyperkeratose, fokalen Parakeratosearealen und Akanthose. Elektronenmikroskopisch fanden sich im Stratum granulosum eine hohe Keratinosomenanzahl, Keratinosomenlamellen in den Interzellularräumen und teils vermehrtes Keratohyalin mit Verklumpung. Weiterhin waren kurze Tonofilamentbündel mit Verklumpungen im Stratum spinosum auffällig. Systemische Retinoide brachten dem Sohn eine mehrere Monate anhaltende Befundbesserung. Die Mutter berichtet über ähnlich gute Erfolge unter einer Retinoidintervalltherapie. Die Beobachtung zeigt die Schwierigkeit, die Erythrokeratodermia progressiva symmetrica als eigentlich lokalisierte Verhornungsstörung bei jedoch zwischenzeitlich ausgedehntem, generalisiertem Zustand mit den derzeitig zur Verfügung stehenden klinischen und ultrastrukturellen Kriterien zuverlässig von anderen Verhornungsstörungen abzugrenzen.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1173
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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