Defining Toxic Mold Spores

by: Chris Anzalone, eHow Contributor

Toxic mold is a concern for homeowners and anyone who must work or spend time in an environment with mold spores.

Though there are more than 400,000 types of mold, the majority are not toxic. "Toxic mold" refers to a very specific type of spore.

Defining Toxic
No mold spore is toxic, in and of itself. Certain molds, such as Stachybotrys chartarum and Aspergillus flavus, are classified as toxigenic. A toxic substance consists of toxins, whereas a toxigenic substance such as certain molds is non-toxic, but has the ability to release airborne toxins. Toxigenic molds release toxins known as mycotoxins.

Determining Toxicity
Only a mold expert can determine the exact mold type, and therefore determine whether or not the mold produces mycotoxins. The symptoms associated with toxigenic mold exposure match the symptoms produced by other molds, such as sinus infection, hypersensitivity pneumonitis (an inflammation of the lungs), respiratory infection, coughing and wheezing.

As a result, you cannot determine the toxicity by symptoms alone, nor can you determine toxicity by appearance. For example, Stachybotrys, a toxigenic mold, has the same color and consistency of Cladosporium, which is a non-toxigenic mold.

Contact a mold expert to determine toxicity. Cancer Risk Cancer risk sets toxigenic molds apart from non-toxigenic molds. The Environmental Protection Agency warns that molds such as Aspergillus flavus and Aspergillus parasiticus contain a carcinogenic mycotoxin known as aflatoxin B1. Aflatoxin B1 can contribute to the growth of liver cancer.

For this reason, you should treat all molds as a potential hazard, since you cannot determine toxicity by observation alone. Non-toxigenic molds can cause symptoms, but are seldom life-threatening.

Other Mold Types Every household mold falls into one of three categories. The toxigenic molds comprise one category, but the other two categories are allergenic and pathogenic molds. A pathogenic mold can cause illness and infection.

However, it contains no mycotoxins and is not believed to contribute to cancer growth. An allergenic mold affects only people with allergies and potentially people with respiratory sensitivities such as asthma.

from:http://www.ehow.com/m/info_8354571_toxic-mold-spores.html