Mold &
biotoxin
exposure.

Molds are not all the same. Different species have different environmental and health implications, and some can produce mycotoxins:

• Stachybotrys — often referred to as the infamous “black mold.” Commonly found in water-damaged buildings.Produces trichothecene mycotoxins, associated with effects on the blood-brain barrier and with neurological symptoms, mood changes (depression, anxiety), severe fatigue, and respiratory issues — including lung infections.
• Chaetomium — typically signals significant moisture damage.Produces chaetoglobosins, mycotoxins associated with headaches, dizziness, and brain fog. Some research has also explored possible links to neurodegenerative conditions, including dementia.
• Aspergillus / Penicillium — produce aflatoxins and ochratoxins, mycotoxins associated with liver and kidney burden, immune suppression, and other health concerns.
• Cladosporium — more common. Often linked to more “typical” mold-exposure symptoms such as itchy eyes, congestion, coughing, and nasal irritation.

Chronic Inflammatory Response Syndrome (CIRS) is one framework used to describe a pattern of multi-system symptoms associated with biotoxin exposure, developed by Dr. Ritchie Shoemaker. It involves dysregulation that may affect the immune, nervous, endocrine, and other body systems.

Not everyone exposed develops CIRS. Differences in genetics, overall health status, and total exposure burden all influence susceptibility.

A home can appear clean, dry, and well-maintained while still harboring hidden growth or contamination from past moisture events. When mold exposure is being considered, it helps to combine more than one form of evaluation:

• Detailed visual inspection
• Moisture mapping
• Air sampling
• Surface or cavity sampling
• Dust-based testing such as ERMI or HERTSMI

No single test tells the full story. Air sampling, for instance, is influenced by timing, airflow, disturbance, weather, and what is actively airborne during collection. Heavier spores tied to water-damaged buildings — Stachybotrys, Chaetomium — can be underrepresented if they are settled rather than airborne when sampled.

Common alternative explanations — stress, aging, allergies, hormones, anxiety — fit many of the same complaints, so a clinician may not consider the building unless asked. Each symptom on its own (brain fog, fatigue, sinus issues, headaches, joint pain, skin reactions, mood changes) appears in many other diagnoses.

The smell people associate with mold — musty, earthy, stale, damp — is often microbial volatile organic compounds (mVOCs), gases released during growth. An absence of odor does not rule out hidden moisture damage or mold.