Guest guest Posted June 17, 2004 Report Share Posted June 17, 2004 False. Otherwise my house and an oral surgeon's place I worked on 3-4 years ago (just looked at it again last week for client relations), and a condo in Florida, etc. would be burned to the ground. Chaetomium is ascomycete, forming large fruiting bodies (balloon-like structures) [don't expect to finds hyphae just spores and fruiting bodies]that release a lot of spores at once. It is very common outdoors, not indoors, very characteristic spores, and some species have been known to produce mycotoxins. It does fairly well on processed cellulose and apparently military textiles. I usually see it in higher water content spaces. But it ain't that bad for remediation - treat like any other - remove the moisture source. Tony .................................................. " Tony " Havics, CHMM, CIH, PE pH2 5450 N. Lafayette Road Indianapolis, IN 46254 Office: Fax: This message is from pH2. This message and any attachments may contain legally privileged or confidential information, and are intended only for the individual or entity identified above as the addressee. If you are not the addressee, or if this message has been addressed to you in error, you are not authorized to read, copy, or distribute this message and any attachments, and we ask that you please delete this message and attachments (including all copies) and notify the sender by return e-mail or by phone at . Delivery of this message and any attachments to any person other than the intended recipient(s) is not intended in any way to waive confidentiality or a privilege. All personal messages express views only of the sender, which are not to be attributed to pH2 and may not be copied or distributed without this statement. Chaetomium Hey group, I was doing some research on Chaetomium, and I came across something in one web-site, that I didn't see in any others, so I'm hoping someone out there can fill me in. The site stated " Buildings found to [have] chaetomium are one of the few types of fungi that are actually irremediable by any means. The only means of destroying the building would probably be to bury it, as fire would not be hot enough. " I was just wondering how true this statement is. My company isn't involved in the actual remediation...we do the initial inspections, consulting, and post-remediation inspections, but I'm trying to learn more about the remediation processes. Any thoughts on this issue would be of great help to me. Thanks Leitzman CES, Inc. FAIR USE NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 18, 2004 Report Share Posted June 18, 2004 and Tony, Chaetomium is very common in drywall on the front where the paper surface is bleached. The bleaching process seems to make a selective environment for Chaetomium (the backside is rich in Stachybotrys, Aspergillus versicolor and others). Bleach or sodium hypochlorite could not kill Chaetomium globosum at any dilution when a University of land microbiologist was doing a comparison study with biocides. Neither the EPA or CDC could supply any proof other than an EPA Fungicidal registration based on Trichophyton mentographetes (I probaby mispelled the species name for athlete's foot fungus). There is a Harvard paint coatings test where this organism was used. it appears to me (from experience)the organism could be a nitrogen reducer (able to attain its nitrogen requirements from something other that air). I witnessed the almost exclusive and heavy growth between layers of drywall in a firewall construction damaged by Hurricane Floyd in Washington DC. So, if 's and Fiberlock tell us to spray their lovely quaternary ammonium disinfectants (as a means of decontamination )on the drywall and paint them.................don't be suprised if this action leads to disaster. None of the junk mail filling my mail box from these 2 companies is addressing this issue. Paint companies will have to be more forthcoming or we should not use them. The Chaetomium globosum is the most common species. Chaetomium funicola is the next most common. Chaetomium globusum can produce chaetoglobosin A and C (mycotoxin). In an European study of buidling substrates, water damaged and innoculated, Chaetomium globosum was the only type of mold that produced the known mycotoxins 100% of the time. Also, one species or more of Acremonium is a anamorph of Chaetomium. Acremonium is very common on water damaged wallboard. (Anyway, this should really confuse the spore trap pump jockeys since Acremonium along with Wallemia is lumped in with the Penicillium/Aspergillus group.) The minimum water activity for this species is 0.94 Aw (in soil). This organism is a great water marker. It grows from 4C to 38C. It is a medically significant organism. There is a single pathology report from the state of Colorado where a pathologist theorizes it may have been the cause of brain cancer in a patient who died from brain cancer. To be fair, I'm sure there was some sort of immune compromised scenario. It is my experience that Stachybotrys is probably growing if Chaetomium is in air samples. Chaetomium is an " active " spore releaser versus Stachybotrys being a " passive " spore releaser (requires mechaical means to relaese spores like wind, air currents, rain or insects). However, if someone has been cutting drywall, the results could be very confusing since it is in the front or bleached side of wallboard. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 18, 2004 Report Share Posted June 18, 2004 You have seriously got to quit believing things that you see on the Internet, just because they are there. What you read makes no sense whatsoever. No mold spore can survive fire, because it is so small. Since the Chaetomium genus and specificaly the species C. globosum is very common (the most common in several large samples of materials affected by molds) it is usually available soon after cleaning to recontaminate surfaces. It did not survive the cleaning, it simply took over after the cleaning. Do not suspend your disbelief! Specifically do not believe everything that I say, even though I may believe it. As a certified (some say certifiable) member of the human race I make mistakes, as do others. It is an inherent part of being human. However, one can often (but not always) sort the wheat from the chaff. Think!! Jim H. White SSAL Chaetomium > Hey group, > > I was doing some research on Chaetomium, and I came across something > in one web-site, that I didn't see in any others, so I'm hoping > someone out there can fill me in. The site stated " Buildings found > to [have] chaetomium are one of the few types of fungi that are > actually irremediable by any means. The only means of destroying > the building would probably be to bury it, as fire would not be hot > enough. " > > I was just wondering how true this statement is. My company isn't > involved in the actual remediation...we do the initial inspections, > consulting, and post-remediation inspections, but I'm trying to > learn more about the remediation processes. Any thoughts on this > issue would be of great help to me. > > Thanks > > Leitzman > CES, Inc. > > > > > > FAIR USE NOTICE: > > This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted June 18, 2004 Report Share Posted June 18, 2004 Thanks for your lovely response, Jim. For the record, I do not believe everything I read..especially on the internet, just as I don't believe everything I hear..especially from the media. That being said, I posted that message because it was one of the craziest things I have ever heard. I wasn't making an attempt to agree with the web-site, but I was trying to bring it to the groups attention. Anyway, I don't need to defend my post, because I'm not the one publishing those insane statements on my web-site. As for where to find this information, the web-site is http://www.mold-help.org/chaetomium.htm and the specific area to look is in paragraph 8. As far as the presence of Chaetomium in the indoor environment goes, I have had two or three copies of analyticals come across my desk this week alone where the ONLY hits that the samples had were Aspergillus/Penicilium, Stachy, and Chaetomium, granted all of these samples came from houses where there was definite water intrusion. CES, Inc. > > You have seriously got to quit believing things that you see on the > Internet, just because they are there. What you read makes no sense > whatsoever. No mold spore can survive fire, because it is so small. > > Since the Chaetomium genus and specificaly the species C. globosum is very > common (the most common in several large samples of materials affected by > molds) it is usually available soon after cleaning to recontaminate > surfaces. It did not survive the cleaning, it simply took over after the > cleaning. > > Do not suspend your disbelief! Specifically do not believe everything that I > say, even though I may believe it. As a certified (some say certifiable) > member of the human race I make mistakes, as do others. It is an inherent > part of being human. However, one can often (but not always) sort the wheat > from the chaff. Think!! > Jim H. White SSAL > > Chaetomium > > > > Hey group, > > > > I was doing some research on Chaetomium, and I came across something > > in one web-site, that I didn't see in any others, so I'm hoping > > someone out there can fill me in. The site stated " Buildings found > > to [have] chaetomium are one of the few types of fungi that are > > actually irremediable by any means. The only means of destroying > > the building would probably be to bury it, as fire would not be hot > > enough. " > > > > I was just wondering how true this statement is. My company isn't > > involved in the actual remediation...we do the initial inspections, > > consulting, and post-remediation inspections, but I'm trying to > > learn more about the remediation processes. Any thoughts on this > > issue would be of great help to me. > > > > Thanks > > > > Leitzman > > CES, Inc. > > > > > > > > > > > > FAIR USE NOTICE: > > > > This site contains copyrighted material the use of which has not always > been specifically authorized by the copyright owner. We are making such > material available in our efforts to advance understanding of environmental, > political, human rights, economic, democracy, scientific, and social justice > issues, etc. We believe this constitutes a 'fair use' of any such > copyrighted material as provided for in section 107 of the US Copyright Law. > In accordance with Title 17 U.S.C. Section 107, the material on this site is > distributed without profit to those who have expressed a prior interest in > receiving the included information for research and educational purposes. > For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. > If you wish to use copyrighted material from this site for purposes of your > own that go beyond 'fair use', you must obtain permission from the copyright > owner. > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 11, 2005 Report Share Posted December 11, 2005 , (1) Microbiological agents (bacteria, fungi) that grow and cause infection or unwanted microbial growth need to be killed or controlled. (2) Biological agents that causes allergy (pollen, animal dander, fungal spores, etc.) need to be removed from the environment. Many fungi (mold) are allergenic. They should be removed if possible. After removing mold from building materials, they still need to be controlled because they can grow back even if only 0.0001% of spores remain. The best way to control mold growth is controlling the water (moisture). Bleach can kill different fungal spores in different degree (for example, 90% killing to 99.9999% killing, not scientific data, just example). If you don't remove those dead spores, they still can be allergenic. Even if bleach kill 99.9999% of spores, the remaining spores can grow back if water problem persists because bleach won't have much of inhibition effect after the initial application. There are some mold growth inhibiting chemicals available. However, whether or not to use such chemicals is an issue still debating by professionals in this field. There are pros and cons in either approaches. Wei Tang QLAB Chaetomium Ive been reading that chaetomium does not react to bleach, but rather, if found should be carted away. True? Thanks, FAIR USE NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. Quote Link to comment Share on other sites More sharing options...
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