The Most Dangerous Mold & How To Spot It, From A Remediation Expert

Still, as a mold remediation and air quality expert, I don't believe that either of these species qualifies as the No. 1 mold to look out for. That superlative goes to Aspergillus. That's right! A "common mold." 

In comparison, black mold requires much more available water for a spore to begin to colonize the area.

Aspergillus has the ability to produce microscopic toxins called mycotoxins. When the colonized mold feels threatened, it will begin producing these tiny toxins along with more mold spores. One example of a threatening situation is when another species of mold moves in and starts encroaching on the Aspergillus' territory.

Those with compromised immune systems are especially prone to developing symptoms. Their immune systems are not equipped to rid their bodies of mold spores, mold particles, and toxins. Transplant patients, for instance, are at a higher risk2 of getting sick or rejecting their transplants if they're exposed to mold because they're on a series of immunosuppressants. Individuals with compromised immune systems are also more likely to develop Aspergillosis3, a disease caused by exposure to Aspergillus.

Unlike black or brown mold that looks like coffee-like stains and draws the eye, this muted color often blends in with its surroundings. This means that Aspergillus can continue to grow for much longer before being detected.

Make sure to look carefully throughout these spaces since Aspergillus is often so light in color (although, it can be brown or gray, too!). Using a flashlight is a great way to shine a light on any hard-to-see mold growth. During this mold hunt, make sure to rely on your nose as well. Mold growth often creates a musty, earthy, rotten, and damp scent.

This mold inspector will be able to give a picture of what the mold situation is, including what species of mold are present, if there are any other moldy issues elsewhere in the home, and if any other contaminants exist as well. Armed with this information, you can determine whether a remediation team is needed to come in and properly remove the mold, fix the source of the problem, and handle all contaminants present.