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Latrodectism. The southern black widow spider (Latrodectus mactans), a cause of latrodectism. Specialty. Emergency medicine. Latrodectism (/ lætrəˈdɛktɪzəm /) is the illness caused by the bite of Latrodectus spiders (the black widow spider and related species). Pain, muscle rigidity, vomiting, and sweating are the symptoms of latrodectism.
Tangle-web spiders. One genus of the tangle web spiders has venom which is known to be medically significant. This genus, the widow spiders of genus Latrodectus, has caused human fatalities. The other genus, Steatoda, the false widow spiders, have bites that can cause pain and erythema but only around 30% of bites lead to systemic symptoms.
The geographical range of the widow spiders is very great. As a result, far more people are exposed, worldwide, to widow bites than any other spider. Widow spiders bites are most often mild but may rarely cause serious complications in people. Fatalities had been reported as high as 5% of bites and as low as 0.2% of bites. [26]
Though a rare black widow bite is frightening, it is unlikely to turn fatal, researchers say. The 2021 National Poison Data System report from America’s Poison Centers reported zero fatalities ...
In addition to the bite itself, you might develop some other symptoms in the next few hours and days. The early signs of a spider bite may include: A raised, itchy bump or rash. Pain at the site ...
Latrodectus is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. [3][4][5][6] However, the diversity of species is much greater. A member of the family Theridiidae, this genus ...
Symptoms of a Black Widow bite, according to Orkin, can include: "dull muscle pain throughout the entire body. The bite site later swells and turns red, forming a target-shaped lesion.
Redback spider. The redback spider (Latrodectus hasselti), also known as the Australian black widow, [2][3][4] is a species of highly venomous spider believed to originate in Australia but now, Southeast Asia and New Zealand, with colonies elsewhere outside Australia. [5] It is a member of the cosmopolitan genus Latrodectus, the widow spiders.