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The Australian red-back and North American widow species live near humans and bites are frequent, numbering thousands yearly. The venom produces very painful effects including muscle spasms, 'tetanus-like' contractions, nausea and vomiting, and severe generalized pain. A serious bite will often require a short hospital stay to control pain.
Treatment at the hospital for a spider bite might include antivenom, antibiotics, pain medication and wound care, depending on the type of spider responsible for the bite, MedlinePlus says.
Solifugae is an order of arachnids known variously as solifuges, sun spiders, camel spiders, and wind scorpions. The order includes more than 1,000 described species in about 147 genera . Despite the common names, they are neither true scorpions (order Scorpiones) nor true spiders (order Araneae ).
A venomous spider bite (like this brown recluse bite) can cause a red or purplish rash radiating from the site of the bite. There are only a few species of spiders in the U.S. that can bite humans.
The LD50 of many poisons is known for humans but not that of spider venom. [citation needed] Serious bites develop symptoms quickly, within the hour. While a serious medical condition may result (see latrodectims and loxocelism) fatalities are exceedingly rare. Appropriate medical treatment can improve speed of recovery.
Loxoscelism (/ l ɒ k ˈ s ɒ s ɪ l ɪ z əm /) is a condition occasionally produced by the bite of the recluse spiders (genus Loxosceles). The area becomes dusky and a shallow open sore forms as the skin around the bite dies . It is the only proven type of necrotic arachnidism in humans.
Symptoms of a bite depend on the amount of venom injected. A bite of Latrodectus may not inject any venom (known as a dry bite) and so no illness occurs. About 75% of "wet" bites will have localized pain and nothing more. [1] If, however, there is a substantial dose, a bite can cause latrodectism.
Syndaesia mastix is a species of arachnids in the order Solifugae, and the only member of the genus Syndaesia.It lives in western Argentina, and is one of only two daesiids in South America, the other being Ammotrechelis goetschi from the Atacama Desert; all other South American solifugids are in the families Eremobatidae and Ammotrechidae.