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3 of the Most Toxic Mold Species to Watch Out For

If you see mold growing inside your home or anywhere on your property, you need to act fast and get it removed as soon as possible. However, not every mold we see is toxic, although there are definitely a few that can kill people or make them very sick. As most mold varieties are known to cause allergies and could destroy your property in the long run, it’s better not to take the chance. On this list, you will find three varieties of fungus that are as toxic as molds can possibly be; you should immediately call for help as soon as you see any of them.


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Stachybotrys Atra or Black Mold

The term black mold is a dreaded and infamous name which used to claim a lot of lives back in the older days when less was known about the fungi and its effects on people’s health. Black mold or Stachybotrys Atra can potentially kill a human being (especially children and the elderly) after long-term exposure to the mycotoxins they release. Common symptoms and effects of the black mold include.

  • Brain and nerve damage

  • Coughing, breathing problems, and eventually respiratory failure

  • Congested sinus and sore throat

  • Tiredness and aching body

  • Irritated eyes

Black mold grows primarily on wood, cardboard, gypsum board, and just about any other organic surface, but when there’s enough moisture, Stachybotrys Atra can even grow on tiles or concrete. You can recognize black mold with the help of the following characteristics.

  • The appearance is generally slimy and the color is either greenish-black or greenish-gray

  • A musty, mildew odor often accompanies the black mold


This variety is generally found in drywalls with moisture damage, but any other region that contains enough moisture can also play host to this toxic mold as well. Chaetomium may cause brain and nerve damage, cancers, auto-immune disease, and in certain cases, even DNA alteration and damage. You can recognize the Chaetomium fungi with the help of the following typical characteristics.

  • Olive brown color or white and cotton-like appearance

  • Lemon-shaped structure

  • A cluster of the Chaetomium may exhibit a ropey structure

  • Musty odor accompanying the fungi is usually pretty strong


This is a particularly large group of mold and while a large number of the fungi in this species are harmless, the fumonisins and trichothecenes produced by them can affect human beings by causing diseases such as mycotic keratitis, and blood infections in children and adults with weakened immunity. You can identify the fusarium mold with its brown and red coloration. It is a parasitic mold and will, therefore, grow on your fingernails and toenails, too.

Whether the mold you see growing on your property seems to be a specimen of the above-mentioned mold types or not, you should never try to remove them on your own. You need to be mold certified to remove these fungi safely and without getting yourself or anyone around you infected with the toxins, which are mostly airborne.

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