Investigations and evaluation of mold related problems rely on sampling techniques to determine the presence or absence of mold growth. In the indoor environment presence of mold is an indirect indicator of the occupants’ potential exposure to those molds. There are several mold sampling methods and understanding the advantages and disadvantages of each method is […]
NIOSH Mold and dampness assessment tool
Until recently there were no detailed standards for assessment of mold and moisture intrusion in buildings. The first such standard was released by ASTM in 2014. The standard “ASTM D7338 – 14. Standard Guide for Assessment Of Fungal Growth in Buildings” describes minimum steps and procedures for collecting background information on the affected building, procedures […]
Mold Growth on Imported Products
Mold growth on products is a major problem facing many manufacturers, vendor suppliers, warehouses, wholesalers, distributors, and retailers. Millions of dollars are lost every year to mold growth. The problem is that products of organic nature such as clothes, leather products, wooden products and many others are subject to damp conditions while in transit from overseas […]
Water Activity Requirements For Mold Growth
Definition of Water Activity Water activity (aw) refers to “free” water available for microbial growth. For microbial growth to occur, moisture must be freely available. The water activity of a material determines which types of mold would grow on that material. Technically, the water activity is defined as the ratio of the vapour pressure exerted […]
What is Aspergillus fumigatus?
Aspergillus fumigatus is a thermotolerant/thermophilic fungus capable of growing over a wide temperature range (12°C–53°C). It has a worldwide distribution. Being thermotolerant, it is a significant component of compost microflora. Health effects associated with Aspergillus fumigatus The spores of Aspergillus fumigatus are very small. Having a diameter of 2–3.5 µm, they are easily inhaled deep […]
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