all symptoms associated toxic spider bites
although spiders feared, few species dangerous people. spiders bite humans in self-defense, , few produce worse effects mosquito bite or bee-sting. of medically serious bites, such recluse spiders , widow spiders, rather flee , bite when trapped, although can arise accident. funnel web spiders defensive tactics include fang display , venom, although inject much, has resulted in 13 attributed human deaths on 50 years. have been deemed world s dangerous spiders on clinical , venom toxicity grounds, though claim has been attributed brazilian wandering spider.
there 100 reliably reported deaths spider bites in 20th century, compared 1,500 jellyfish stings. many alleged cases of spider bites may represent incorrect diagnoses, make more difficult check effectiveness of treatments genuine bites. review published in 2016 agreed conclusion, showing 78% of 134 published medical case studies of supposed spider bites did not meet necessary criteria spider bite verified. in case of 2 genera highest reported number of bites, loxosceles , latrodectus, spider bites not verified in on 90% of reports. when verification had occurred, details of treatment , effects lacking.
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