What are Mould Spores and Why are They so Dangerous to Health?
Mould spores are tiny structures produced by moulds for reproduction purposes.
They are so small that we can hardly see some of them even when magnified 400
times. One cubic meter of outdoor air may contain
as many as 100,000 spores. The volume of air we inspire at rest per minute is
estimated at 10 litres. Therefore, in an hour we inhale close to 600,000 spores.
The air in working environments including mouldy buildings may contain up to
1,000,000,000 spores per cubic meter of air.
In indoor environments moulds grow on moist surfaces such as the drywall,
wallpaper, carpet, baseboards and heating, ventilation and air-conditioning
systems (HVACs). As these moulds grow, a stage is reached when they produce
spores. The spores become airborne after drying out or disturbed.
Why are these spores so dangerous to our health?
About 20% of the population is allergic to mould spores. Apart from being
allergenic, spores of some mould species such as Stachybotrys contain toxic
compounds called mycotoxins. Symptoms associated with mould spores may include
allergy, headache and fatigue, running nose, sneezing, coughing, pneumonia and
Asthma among others. Young children, the elderly and people undergoing medical
treatment are particularly susceptible to mould spores.
How can we control indoor mould spores?
It is extremely difficult to get rid of spores completely. We can, however,
reduce their numbers by controlling mould growth in our houses or offices. Mould
growth is associated with moisture problem as a result of flooding, leaks in
roofs or plumbing and condensation in case of poor ventilation or inadequate
insulation. The key to controlling mould growth is keeping our houses or offices
dry by maintaining low relative humidity (below 70%) thus eliminating or slowing
the growth of most mould species. Any water leakage should be repaired
immediately and the water dried out within 48 hours. Constant monitoring for
mould growth in the kitchen, bathrooms, window frames, carpets and baseboards is
recommended. The earlier the mould is discovered the cheaper and easier it is to
get rid of the problem.
What should you do if you notice mould growing in your house or office?
Do not panic! Seek professional advice. Not all moulds are dangerous to health,
but no mould should be allowed to grow in our dwellings. Also the health effects
of indoor moulds depend on the amount of mould one has been exposed to, length
of time of exposure, the types of moulds present and individual’s resistance.
Therefore, presence of mould does not necessarily mean the occupants have been
exposed.
Which are the most dangerous moulds?
People have come to believe that black moulds are the most dangerous.
The truth is, colour does not determine whether a mould is of health concern or
not. To know whether a mould is dangerous or not requires the mould to be
identified by a qualified mycologist.
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ABOUT THE AUTHOR
Dr. Jackson Kung’u is a Microbiologist who has specialised in the field of
mycology (the study of moulds and yeasts). Dr. Kung’u provides how-to advice and
identification services for indoor mould and bacteria to homeowners,
environmental consultants, institutions and indoor air quality professionals
across Canada. Get more information about indoor mould and bacteria at
http://www.moldbacteria.com.
(Disclaimer: This article was written from research and what we learned from multiple sources over an extended period of time. This information is for educational purposes only. Please contact a professional in the area of concern before making any decisions on this or any topic. No-More-Scams.com is not liable for any damages or losses due to one using this information).
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