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Myth: A spider bit me while I was asleep. (No, I didn't see any spider, but what else could it have been?)
Fact: The notion that "if you didn't see what
bit you, it was a spider" is (to me) one of the strangest of the widespread
spider superstitions, already well established in 1901 according to a medical article published then. Even some physicians, who really should know better, accept
it! I have no idea how this belief originated, but it is quite false.
Here are some facts: Unless you are sleeping on the basement floor, a spider
might wander onto your bed as often as twice a year. Not every night! If you
take elementary precautions like not letting the blankets or bedspread touch
the floor or walls, the incidence of spiders on the bed will be effectively
zero. If a spider does get on a bed, usually no bite will result. Spiders have
no reason to bite humans; they are not bloodsuckers, and are not aware of our
existence in any case.
If you roll over onto a spider, most likely the spider
will have no chance to bite. Being crushed against a bedsheet by a human body just doesn't work well as a biting scenario (despite what everyone thinks) because spider fangs are underneath the spider. When pressed on from above, the spider may reflexively bite what it is standing on: the sheet, not your body.
True spider bites (which are rare events) occur when a spider is trapped inside
clothing or when someone foolishly puts a hand or other body part in a spider
habitat without looking, or even more foolishly slaps at a spider that is crawling
on them.
Skin bumps and sores noticed in the morning are generally caused by non-bite disease conditions: see this article for a partial
list. Currently MRSA bacteria (see this article and this one) are among the leading causes of alleged "spider bites." The minority that are really bites are caused by bloodsucking insects
such as fleas, bedbugs, kissing bugs, lice, or assorted flies; less commonly
by mites or ticks. Genuine spider bites in this situation are possible, but very rare.
Myth: How could insects be biting me? I see only spiders in the house!
Fact: Ah, but spiders are exclusively predators. Essentially all the food a spider consumes in its lifetime is other small living creatures, mainly insects. House spiders may be more conspicuous than household insects, but they could not live there without insects to eat. And if they were not there, there'd be a lot more insects!
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to Spider Myths author, Rod Crawford This page last updated 1 September, 2010 This site best viewed at 800 x 600 using IE 5.0 or above. |