The true danger of the spider bite stems from misdiagnosis and resultant delay in proper treatment of entities that, unlike spider bites, are not self-limited. Obtaining a complete exposure and travel history is central to the development of an accurate and appropriate differential diagnosis.

Spider bite is common, but most spider bite is minor and causes nothing more than local irritation. Bites from brown recluse spiders (Loxosceles reclusa) result in several clinical manifestations, they possess a venom capable of causing painful, disfiguring necrotic ulcers and, uncommonly, severe systemic effects[1-3]. The diagnosis of a spider bite is typically made on historical and epidemiol...

BACKGROUND Brown recluse spider bites are a serious medical problem in the southeastern United States. Although most bites are asymptomatic, envenomation can result in a constellation of systemic symptoms referred to as loxoscelism. Patients can also develop necrotic skin ulcers (necrotic arachnidism). These ulcers are often difficult to heal and can require skin grafting or amputation of the b...

In Chile, all necrotic arachnidism is attributed to the Chilean recluse spider Loxosceles laeta (Nicolet) (Araneae: Sicariidae). It is predated by the spitting spider Scytodes globula (Nicolet) (Araneae: Scytodidae). The biology of each of these species is not well known and it is important to clarify their distributions. The aims of this study are to elucidate the variables involved in the nic...

loxosceles rufescens , commonly known as the mediterranean recluse or mediterranean fiddle-back spider is recorded from iran for the first time. the genus loxosceles contains 103 accepted species, two of them (including l. rufescens ) are cosmopolitan. all loxosceles species tested so far possess necrotic venoms, which is a unique characteristic among the order araneae. considering this charact...