Interpreting Mold Samples

A useful method for interpreting microbiological results is to compare the kinds and levels of organisms detected in different environments. Usual comparisons include indoors versus outdoors, or complaint areas versus non‐complaint areas. Specifically, in buildings without mold problems, the qualitative diversity (types) of airborne fungi indoors and outdoors should be similar. Conversely, the dominating presence […]

Mold Basics – Part 2

Molds are tiny, multicelled organisms made up of branching filaments called hyphae (singular: hypha). Some of the hyphae are embedded in the material on which the molds grow and are called vegetative hyphae. Many molds also have other hyphae, called aerial hyphae, which absorb oxygen from the air. Rhizoids, hairlike filaments resembling roots, grow from […]

Asthma Triggers Part 3 – Mold

Molds are microscopic fungi that live on plant and animal matter. Molds can be found almost anywhere when moisture is present. Molds create tiny spores to reproduce, just as plants produce seeds. Mold spores float through the indoor and outdoor air continually. When mold spores land on damp places indoors, they may begin growing. For people sensitive […]

What is Aspergillus? – Part 2

Aspergillus Symptoms Since Aspergillus spores are everywhere, we are constantly breathing them in. However the amount of Aspergillus spores in the air is usually within our natural tolerance levels and hence does not affect our health. If you have Aspergillus mold in your home or environment, however, the increased amount of airborne spores can lead […]

Toxic Types of Mold

Toxic mold” is a term that is used to describe types of mold that are considered deadly to humans. Most people believe that the name refers to one particular species of mold; however, it encompasses hundreds of species, a small fraction of which are not very harmful to the human body. Black mold is commonly […]

Mold Growth & Sporulation in Buildings – Part 2

    Each stage of fungal growth (spore germination, vegetative growth, sporulation) has a specific set of conditions that is optimal. Important conditions in this set are nutrient types and concentrations, light, temperature, oxygen and water availability. Water availability (i.e., water activity) is one of the most important of these. Each fungus has optimal water activities […]

Most Common Indoor Mold Spores

AlternariaA large spore mold that can deposit in the nose, mouth and upper respiratory tract causing an allergic response. Indoors, it is often found in carpets, textiles, house dust and potentially damp areas like window frames and showers. It can also be found in plant soil. AspergillusUsually found in warmer climates in areas of water […]