Lonceint J, Sassolas B, Guillet G
Service de Dermatologie, CHU Morvan, 29609 Brest Cedex.
Ann Dermatol Venereol. 2001 Jan;128(1):46-8.
The diagnosis of photodermatosis is generally facilitated by the typical localization of the eruption. The causal agent can usually be identified by history taking, allowing eviction and cure. It may be difficult to find the causal agent in cases with a sequential course. The occupational and/or recreational environment may provide helpful information. We present two cases of photodermatosis related to the occupational environment.
A 50-year-old woman and a 29-year-old man were farm workers. both consulted for photoinduced eczema. The eczema was triggered by episodic manipulation of an antibiotic used widely for preparing animal feed. The standard allergy tests were negative. The photobiology exploration led to the diagnosis of photoallergy to olaquindox, a growth promotor added to animal feed. The course was favorable after eviction or protection against the product, providing a complementary proof of its triggering effect.
We emphasize the contribution of photobiological explorations in difficult cases with an occupational background. Generally, these patients are unaware of the composition of the products manipulated, such as feed additives.
光皮肤病的诊断通常因皮疹的典型分布部位而变得容易。病因通常可通过病史采集来确定，从而得以排除病因并治愈疾病。对于病程呈连续性的病例，可能难以找到病因。职业和/或娱乐环境可能会提供有用信息。我们报告两例与职业环境相关的光皮肤病病例。
一名50岁女性和一名29岁男性均为农场工人。两人均因光诱发性湿疹前来咨询。湿疹是由偶尔接触一种广泛用于制备动物饲料的抗生素引发的。标准过敏试验结果为阴性。光生物学检查诊断为对喹乙醇过敏，喹乙醇是添加到动物饲料中的一种生长促进剂。在避免接触或防护该产品后，病情好转，这为其引发作用提供了补充证据。
我们强调光生物学检查在有职业背景的疑难病例中的作用。一般来说，这些患者并不了解所接触产品的成分，如饲料添加剂。
