The Chronic Neurotoxins.com website provides information on chronic human illness caused by exposure to toxins produced by living organisms (biotoxins). Many biotoxins are neurotoxins in that they adversely affect neurologic function.
Many types of organisms produce substances that are toxic to humans. These include dinoflagellates found in estuaries and the ocean, cyanobacteria (blue-green algae) found in fresh water, fungi (mold) found in indoor air and outdoors, and some types of bacteria.
more – chronicneurotoxins.com
There are tremendous variations in the kinds of buildings that can become home to toxin-forming species of fungi. Any building that provides the proper mix of food and water can potentially be at-risk. When the building has air circulation that is closed, with little outside air input and windows that don’t open, any intrusion of water can become the source of fungal blooms. The variations on how the building became sick (water intrusion through leaky roofs, windows or doors; wicking of water along a concrete slab or saturation of carpets; and pooling of surface water in basements come to mind) are relatively few.