Re: Brown recluse

John Taylor [The Banshee] (rphjt@minyos.xx.rmit.OZ.AU)
Mon, 26 Jul 93 14:20:06 +0000

>He and his students spent years studying the necrosis which Dale described
>(in wonderfully explicit and gory detail) to determine the cause and attempt
>to develop better treatment that the steroids, painkillers, and often surgery
>that Dale endured. Interestingly, they had difficulty finding a lab animal
>that reacted with a necrosis. Rats are apparently immune to brown recluse
>venom, and mice showed little reaction up to the point at which they died
>without ever developing a necrosis. He believes that many humans do not react
>to brown recluse venom with a necrosis (only the unlucky ones!) and I'd have
>to agree. Both my grandmother and my wife have been bitten by brown recluses.
>My grandmother developed a very small necrosis (less than 10 mm diameter), and
>my wife none at all. There may be a much larger number of people bitten each
>year in this area than are reported, because those of us who do not react may
>not even notice the bite.

Again, this sounds much like the White-tailed spider bite (from what I can
remember - luckily, I've never experienced this ordeal). Another interesting
(useless?) piece of trivia is the fact that cats are immune to the Funnel-Web
spider's bite - the most deadly Australian spider (also a large, nasty looking
beast with fangs to match). I wonder if there's any similarity between the
two toxins?

>Brown recluses are hunters, rather than web builders (they can spin but seldom
>do), and love warm, dry places, like stacked cloth or clothing, attics, etc.
>A large one, perhaps 3 years old, may have a leg span about the diameter of a
>silver dollar. We've seen them live in the bottom of an open jar, in which
>they became trapped, for several months without food or water. Most people who
>are bitten are bitten because they exert pressure on the spider without seeing
>it - just as Dale describes moving the clothing with his body. (They know a
>person is too large to eat and will usually not bite if left alone. My former
>teacher has had one walk the length of his body, inside his clothing, without
>biting.)

What size is that in non-monetary terms? I was also reading (in a "New
Scientist" magazine from memory) about a spider that has been introduced to
England which is apparently very agressive - it will bite without provocation
and will strike several times in an attack. Although this doesn't cause the
necrosis of the others, it is still has very unpleasant toxic effects. I
can't remember the name of the spider, but from memory it has striking brick-
red legs (or was that the body?)

| John Taylor [The Banshee] | Royal Melbourne Institute of Technology |