Mold in HVAC Systems: Risks, Signs, and Prevention
HVAC mold is uniquely dangerous because it distributes spores building-wide with every cycle. Learn which components are highest risk, how to recognize contamination, and the maintenance steps…
Share
Mold in Food: When Is It Dangerous and What Should You Discard?
Whether moldy food is safe to eat depends on the food type. Learn the USDA guidelines on what to discard vs. salvage, how mycotoxins like aflatoxin work, and why cooking does not destroy mold toxins.
Share
Mold and Humidity: Understanding the Science Behind the Link
Humidity is the primary driver of indoor mold growth, but the relationship is more nuanced than a single number. Learn about dew point, surface vs. room humidity, seasonal patterns, and…
Share
Mold Remediation: DIY vs. Professional — How to Decide
Should you tackle mold yourself or hire a professional? The EPA recommends DIY only for areas under 10 square feet with no HVAC involvement. Learn the criteria, proper DIY steps, and what to…
Share
How to Prevent Mold: A Practical Guide to Moisture Control
Mold prevention is fundamentally about moisture control. This practical guide covers indoor humidity targets, ventilation strategies, leak response timing, HVAC maintenance, and…
Share
Mold Testing and Inspection: Methods, Costs, and What Results Mean
Air sampling, ERMI, surface swabs, or DIY test kits — which mold testing method is right for your situation? Learn what each method can and cannot tell you, and how to interpret the results.
Share
How to Identify Mold in Your Home: A Room-by-Room Guide
Learn how to identify mold in your home using visual inspection, smell, and moisture detection. This room-by-room guide covers the highest-risk locations and explains when to call a professional.
Share
Who Is Most at Risk from Mold Exposure?
Children, the elderly, asthmatics, and immunocompromised individuals face the greatest risks from mold exposure. Learn why each group is vulnerable and what the evidence shows about…
Share
Health Effects of Mold Exposure: What the Evidence Shows
Mold exposure is most strongly linked to respiratory effects including asthma and allergic rhinitis. This evidence-based guide covers documented health effects, mycotoxin risks, and which…
Share
Black Mold: Facts, Myths, and What the Science Says
Black mold — most commonly Stachybotrys chartarum — is widely misunderstood. This guide separates the documented science from media-driven myths, covering mycotoxin evidence, real health…
Share
Types of Indoor Mold: An Overview
The most common indoor mold genera — Cladosporium, Penicillium, Aspergillus, Alternaria, and Stachybotrys — differ in their moisture requirements, appearance, and health implications. This…
Share
How Mold Spreads: Spores, Air, and Surfaces
Mold spreads primarily through airborne spores that travel via air currents, HVAC systems, and physical contact. This guide explains the mechanisms of mold dispersal, the disturbance effect,…
Share
How Mold Grows: Conditions and Life Cycle
Mold follows a four-stage life cycle — spore, germination, mycelial growth, and sporulation. This guide explains the biology of mold growth and the environmental conditions that drive it,…
Share
What Is Mold? A Scientific Introduction
Mold is a filamentous fungus that reproduces through airborne spores and grows by breaking down organic matter. This guide explains what mold is biologically, what it needs to grow, and when…
Share
Species Directory
Scientific reference profiles for common mold and fungal species — covering taxonomy, morphology, ecology, and health significance.
Paecilomyces and Purpureocillium: Biological Pest Controllers and Opportunistic Pathogens
Paecilomyces and its reclassified relatives are used worldwide as biological insecticides — but they also cause opportunistic infections in immunocompromised patients and were implicated in a…
Share
Exophiala: The Black Yeast in Your Dishwasher and Nuclear Reactors
Exophiala is a black yeast that survives in jet fuel, nuclear reactor cooling water, and dishwasher rubber seals — and causes fatal brain infections in certain populations. Learn the biology…
Share
Sporothrix schenckii: Rose Thorn Disease and the Brazilian Cat Outbreak
Sporothrix schenckii causes rose thorn disease — a subcutaneous fungal infection acquired through plant material or, in an ongoing Brazilian epidemic, domestic cat scratches. Learn the…
Share
Acremonium: The Mold That Gave Us Cephalosporin Antibiotics
Acremonium chrysogenum is the source of cephalosporin antibiotics — among the most widely used drugs in medicine. Learn the biology of this versatile genus, its role as an indoor building…
Share
Scopulariopsis brevicaulis: The Nail Mold with a Napoleonic History
Scopulariopsis brevicaulis is the leading non-dermatophyte cause of nail infections and the organism responsible for converting arsenic wallpaper pigments into toxic gases — possibly…
Share
Wallemia sebi: The Extremophile Mold That Thrives Where Others Cannot
Wallemia sebi is a xerophilic extremophile that grows at water activities too low for virtually all other molds — thriving in sugar, salt, and even the Dead Sea. Learn why it colonizes dried…
Share
Rhizopus stolonifer: The Common Bread Mold with Serious Potential
Rhizopus stolonifer is the familiar black bread mold — but it is also a member of the Mucorales capable of causing mucormycosis, and a significant agricultural post-harvest pathogen. Learn its…
Share
Serpula lacrymans: The Dry Rot Fungus That Travels Through Walls
Serpula lacrymans — dry rot — is uniquely capable of transporting water through its mycelium across masonry to colonize dry timber throughout an entire building. Learn why this makes it the…
Share
Blastomyces dermatitidis: The Great Lakes Fungus That Strikes Healthy People
Blastomyces dermatitidis causes blastomycosis in the Great Lakes region and river valleys of North America — and unlike most invasive fungi, it regularly causes serious disease in healthy…
Share
Coccidioides: The Desert Soil Fungus Behind Valley Fever
Coccidioides immitis and C. posadasii cause Valley Fever — 150,000 U.S. cases per year, most misdiagnosed. Learn the desert soil biology, expanding endemic range due to climate change, and why…
Share
Cryptococcus neoformans: The Pigeon-Associated Yeast Behind a Leading AIDS-Related Death
Cryptococcus neoformans causes cryptococcal meningitis — responsible for an estimated 150,000–180,000 deaths per year globally. Learn its association with pigeon droppings, how its…
Share
Histoplasma capsulatum: The Widespread Fungus Behind 500,000 Annual U.S. Infections
Histoplasma capsulatum causes an estimated 500,000 infections per year in the U.S., most of which go undiagnosed. Found in bat and bird droppings in the Ohio and Mississippi valleys, it causes…
Share
Botrytis cinerea: Gray Mold, Noble Rot, and the World’s Most Fungicide-Resistant Pathogen
Botrytis cinerea is simultaneously the most economically damaging plant pathogen globally and the producer of noble rot in Sauternes. Learn its biology, why it has evolved resistance to…
Share
Aureobasidium pullulans: The Black Yeast on Your Window Frame
Aureobasidium pullulans is the melanized, stress-tolerant organism responsible for black staining on window caulking and bathroom surfaces. It also produces pullulan, a commercially important…
Share
Ulocladium: The Water Damage Indicator Mold in the ERMI Panel
Ulocladium is a water-damage indicator species classified alongside Stachybotrys in the EPA's ERMI panel. Learn its morphology, why it requires sustained moisture to grow indoors, and what its…
Share
Trichoderma: The Agricultural Biocontrol Fungus That Also Grows Indoors
Trichoderma is famous as an agricultural biocontrol agent but is also an indoor contaminant in water-damaged buildings and an opportunistic pathogen in immunocompromised patients. Learn its…
Share
Chaetomium: The Water Damage Indicator Mold You May Not Have Heard Of
Chaetomium is a water-damage indicator mold whose presence in a building signals prolonged moisture intrusion. Learn its distinctive morphology, why it is classified alongside Stachybotrys as…
Share
Mucor and Mucormycosis: Biology, Clinical Disease, and the COVID-19 Connection
Mucor and related mucormycetes cause mucormycosis — a rapidly invasive, often fatal fungal infection in immunocompromised patients. Learn the biology, clinical forms, why it surged during…
Share
Fusarium: Plant Pathogen, Mycotoxin Producer, and Emerging Human Pathogen
Fusarium is a genus with wide-ranging significance — causing crop diseases, producing regulated mycotoxins in grain, and causing life-threatening infections in immunocompromised patients.…
Share
Alternaria alternata: The Leading Mold Trigger for Asthma
Alternaria alternata is the dominant outdoor allergenic mold in temperate regions and a leading trigger of severe asthma. Learn its seasonal patterns, why it causes such serious respiratory…
Share