Archives for June 2012

Troubleshooting Microbial Contamination In An Industrial Environment

Processing industries such as pharmaceutical, personal hygiene and beauty products, food (including dairy) have microbial contamination control procedures in place. Regular hygiene monitoring of a plant and equipment, and microbiological sampling of products and raw materials are invaluable in detecting potential sources and routes of contamination. Contamination especially in food industry can result to not […]

Interpreting Numerical Data of Viable Airborne Mould Samples

Another article on airborne mould samples provides guidelines for interpreting numerical data of viable air samples. To see the guidelines for non-viable air samples click Guidelines for Interpreting Non-viable Air Samples. The guidelines may be used to decide whether further investigations are required after initial investigations. As was indicated in the last Issue, numerical laboratory […]

Common Building Molds and Their Hazard Classes

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 […]

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