Featured Research

from universities, journals, and other organizations

Bleach Found To Neutralize Mold Allergens

September 25, 2005
National Jewish Medical and Research Center
Researchers at National Jewish Medical and Research Center (NJMRC) have demonstrated that dilute bleach not only kills common household mold, but may also neutralize the mold allergens that cause most mold-related health complaints.

"It has long been known that bleach cankill mold. However, dead mold may remain allergenic," said lead authorJohn Martyny , Ph.D., associate professor of medicine at NationalJewish. "We found that, under laboratory conditions, treating mold withbleach lowered allergic reactions to the mold in allergic patients."

Theneed for denaturing or neutralizing mold allergens is a critical stepin mold treatment that has not been fully understood. Currently, mostrecommendations for mold remediation call for removal since dead moldretains its ability to trigger allergic reactions, according to Dr.Martyny.

The researchers grew the common fungus Aspergillusfumigatus on building materials for two weeks, and then sprayed somewith a dilute household bleach solution (1:16 bleach to water), somewith Tilex® Mold & Mildew Remover, a cleaning product containingboth bleach and detergent, and others only with distilled water as acontrol. They then compared the viability and the allergenicity of thetreated and untreated mold.

The researchers found that the use ofthe dilute bleach solution killed the A. fumigatus spores. When viewedusing an electron microscope, the treated fungal spores appearedsmaller, and lacked the surface structures present on healthy spores.In addition, surface allergens were no longer detected by ELISAantibody-binding assays, suggesting that the spores were no longerallergenic.

The National Jewish researchers then allergy-testedeight Aspergillus -allergic individuals with solutions from the bleachand Tilex®-treated building materials. Seven of the eight allergicindividuals did not react to the bleach-treated building materials, andsix did not react to the Tilex®-treated building materials. Thisevidence suggests that, under laboratory conditions,fungal-contaminated building materials treated with dilute bleach orTilex® may have significantly reduced allergic health effects.

"Thisstudy was conducted under controlled laboratory conditions. In order toassure that the bleach solutions will function similarly under actualfield conditions, additional experiments will need to be conducted,"said Dr. Martyny. "We do believe, however, that there is good evidencethat bleach does have the ability to significantly reduce theallergenic properties of common household mold under some conditions."

This study was partially funded by a grant from The Clorox Company.

NationalJewish is the only medical and research center in the United Stateddevoted entirely to respiratory, allergic, and immune-system diseases,including asthma, allergies, and chronic obstructive pulmonary disease.It is a non-profit, non-sectarian institution dedicated to enhancingprevention, treatment, and cures through research, and to developingand providing innovative clinical programs for patients regardless ofage, religion, race, or ability to pay.

Story Source:

The above story is based on materials provided by National Jewish Medical and Research Center. Note: Materials may be edited for content and length.

Cite This Page:

National Jewish Medical and Research Center. "Bleach Found To Neutralize Mold Allergens." ScienceDaily. ScienceDaily, 25 September 2005. <www.sciencedaily.com/releases/2005/09/050925153158.htm>.
National Jewish Medical and Research Center. (2005, September 25). Bleach Found To Neutralize Mold Allergens. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2005/09/050925153158.htm
National Jewish Medical and Research Center. "Bleach Found To Neutralize Mold Allergens." ScienceDaily. www.sciencedaily.com/releases/2005/09/050925153158.htm (accessed October 1, 2014).

Share This

More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations

Featured Videos

from AP, Reuters, AFP, and other news services

Pregnancy Spacing Could Have Big Impact On Autism Risks

Pregnancy Spacing Could Have Big Impact On Autism Risks

Newsy (Oct. 1, 2014) — A new study says children born less than one year and more than five years after a sibling can have an increased risk for autism. Video provided by Newsy
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) — A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
Powered by NewsLook.com
Insertable Cardiac Monitor

Insertable Cardiac Monitor

Ivanhoe (Oct. 1, 2014) — A heart monitor the size of a paperclip that can save your life. The “Reveal Linq” allows a doctor to monitor patients with A-Fib on a continuous basis for up to 3 years! Video provided by Ivanhoe
Powered by NewsLook.com
Attacking Superbugs

Attacking Superbugs

Ivanhoe (Oct. 1, 2014) — Two weapons hospitals can use to attack superbugs. Scientists in Ireland created a new gel resistant to superbugs, and a robot that can disinfect a room in minutes. Video provided by Ivanhoe
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.


Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News


Free Subscriptions

Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile

Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?

Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins