Building molds are common on damp materials with a water activity value equal to or greater than 0.90. Building molds and yeasts such as strains of Aspergillus fumigatus, Trichoderma spp., Exophiala spp., Stachybotrys spp., Phialophora spp., Fusarium spp., Ulocladium spp., and yeasts such as Rhodotorula spp. grow well on very wet building materials. Materials with a water […]
Dampness, Mould, House Dust Mites and Allergy
The risk of asthma, allergic rhinitis, and atopic (hereditary) dermatitis is higher in damp buildings than non-damp buildings. However, dampness itself may have no or little direct effect to allergy development. Dampness only favours proliferation of biological and increased emission of chemical pollutants. A strong association has been found between exposure to visible mould and […]
The Risks of Eating Mouldy Foods
Recently we were asked the following questions: “Eating mouldy bread is discouraged. Where can I find the facts that prove this? Are there moulds that grow on bread that are harmless? Some of my patients that survived food shortages in The UK during World War II by eating mouldy bread and other foods insist that […]
Airborne Fungal Spores: Non-viable and viable Air Sampling Methods
Which Sampling Method Should One Use for Airborne Fungal Spores? Concerns about health issues, especially allergic reactions from inhaling fungal spores, has made air sampling an important component of indoor mold investigation. Air can either be sampled onto some growth media for culture analysis (a.k.a viable or culturable samples) or on a sticky surface or […]
Stachybotrys chartarum- A Black Mould Of Many Controversies
Stachybotrys chartarum, also known by an old name as Stachybotrys atra, is a cellulose degrading fungus commonly found in soil and on materials rich in cellulose such as hay, straw, cereal grains, plant debris, wood pulp, paper, and cotton. It produces a mass of wet spores sticking together giving the appearance of black pin-heads. The […]
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