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RE: Tegenaria agrestis
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Helsdingen, P.J. van
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Apr 27, 2009 00:06 PDT
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The whole story about Tegenaria agrestis being harmfull to humans is a HOAX!
Peter van Helsdingen
P. J. van Helsdingen
European Invertebrate Survey - Nederland
European Invertebrate Survey - International
National Museum of Natural History
Darwinweg 2, 2333 CR Leiden, Netherlands
P.O. Box 9517, 2300 RA Leiden, Netherlands
tel.: (0031) 71 56 87 413 or (0031) 06 51058720
fax: (0031) 71 56 87 456
E-mail: helsd-@nnm.nl
http://www.naturalis.nl/eis
http://www.european-arachnology.org/reports/fauna.shtml
denk aan het milieu - dit mailtje printen is niet altijd nodig
"There is grandeur in this view of life" (Darwin 1859)
-----Oorspronkelijk bericht-----
Van: Chuck Kristensen [mailto:chu-@spiderpharm.com]
Verzonden: zaterdag 25 april 2009 17:07
Aan: arach-@topica.com
Onderwerp: RE: Tegenaria agrestis
Hi Zachary,
I have not heard of any definitive results and I do not know of anyone
who is looking or is even interesed in looking at this seriously now. As
I recall, Darwin was only able to get a little necrosis in a couple New
Zealand white rabbits (but not in a few other animals), Greta Binford
did not detect Loxosceles-style sphingomyelinase D in T. agrestis and
another bioassay only came up with very weak inflammatory activity.
This could be a difficult project. Even if the activity does exist, it
might take years to find a validate a suitable animal model and/or
cell-based assay and the project could be even more complicated if the
toxin(s) is unstable or if they only produced by one gender at a certain
age or under specific enviromental conditions.
We maintained a colony of Tegenaria agrestis from Salt Lake City several
years ago, but were not able to generate much interest in the venom and
eventually let the colony go senile and die off of old age without
breeding.
We would like to start up another colony sometime soon and have been
asking for live specimens from collectors. Their venom isn't even
available for research now.
Very best,
Chuck
Spider Pharm
http://www.spiderpharm.com
outlande-@yahoo.com wrote:
| | Thanks guys,
I myself become overwhelmed with spider identifications this time of
year here in Utah. Every other person thinks their home is infested with
brown recluse spiders or what not. I had been curious about true
toxicity levels of T. agrestis.
thanks Rick
Zachary J. Valois
Salt Lake City, Utah
Z_Va-@yahoo.com
--- On Fri, 4/24/09, Rick West <rickc-@shaw.ca> wrote:
From: Rick West <rickc-@shaw.ca>
Subject: RE: Tegenaria agrestis
To: arach-@topica.com
Date: Friday, April 24, 2009, 8:34 PM
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Hi Kelly,
I didn't notice your posting on this forum until after it was sent.
Please excuse the
previous typos everyone (corrected below). I suspect Robb's email was
not noticeable
in the reply. I recommend you contact him directly
at; Robb.-@gems6.gov.bc.ca
Hope this helps, Rick
From: Rick West [mailto:rickc-@shaw.ca]
Sent: Friday, April 24, 2009 7:09 PM
To: arach-@topica.com
Cc: Robb Bennett (Robb Bennett)
Subject: RE: Tegenaria agrestis
Hi Kelly,
Allow me to refer you to a local authority on T. agrestis - Dr. Robb
Bennett. The majority
of local spiders brought in by paniced arachnophobes aren't even capable
of penetrating
human skin with their bite. Of those that can, its believed that
bacteria around the mouth
and fang region may be responsible for many of the neucrotic
lesions seen in patients.
These people may be more sensitive to particular bacteria that enter the
bite site ... if it
was, in fact, caused by a spider at all.
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