Cases report of Paederus dermatitis in a factory in Samut Songkhram, Thailand

บทคัดย่อ

Paederus dermatitis is a disease caused by contact with insect in genus Paederus which can be found in tropical countries. Characteristic lesion of this disease is long red streak skin lesion that has multiple blisters on it. This disease may lead to misdiagnosis if not recognized to the insect. This case report describes an outbreak of the disease in a boiler manufacturing factory in Samut Songkhram Province of Thailand. Six patients developed erythematous rash in many exposed areas, mainly at pinnas, periorbital areas, neck, and cubital fossa at the same period of time. A Survey at the factory and near-by residential area found numerous paederus bugs and its cascades. No working process in the factory used chemical substances likely to cause the rashes. After the patients received treatment with topical steroid and advise to avoid contact with paederus bugs, all rashes were disappeared and no recurrences occurred.