Najakcharmer -> RE: Brown recluse spider (12/6/2006 9:44:44 PM)
|
quote:
ORIGINAL: cyberdude611 There are 20,000 different kinds of spiders in the United States alone. Only 60 are capable of biting humans. And only 4 are dangerous. Those 4 are the Brown Recluse, the Black Widow, Hobo, and Yellow Sac. None are aggressive. They will bite usually only when they are threatened. Recluses are skittery and hard to handle, and they can be a bit defensive. Black widows are easy to handle and simply don't bite unless they are crushed or physically restrained. Never worked with Tegenaria or Cheiracanthium, but neither are very toxic to humans. Yellow sac bites are extremely mild. A bee sting is much worse. Yellow sacs are not considered to be a medically significant species. Hobo spider bites can actually cause systemic symptoms as well as necrotic arachnidism, putting Tegenaria up there with Loxosceles and Latrodectus as the three medically significant spider species in North America. Most spiders can't physically bite people because their fangs are too small. Even the ones on this list usually need to be "helped" with some outside pressure, eg, being trapped between clothing and skin, to deliver a sub-q injection to a human. And typically they don't bite people unless they are trapped and crushed in this way. There's a number of spiders in North America with fangs large enough to bite humans quite readily, but their venom is harmless to anything bigger than a bug.
|
|
|
|