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Topic Pages

Topic Pages introduce an aspect of the environment and its relation to public health by featuring a curated shortlist of NCCEH and external resources. The most relevant resources related to a topic have been selected to best guide the search for further information. These lists are not intended to be exhaustive, and the omission of any individual resource does not preclude it from having value.

Legionella

Legionella is an opportunistic premise plumbing pathogen (OPPP) that can cause illnesses including Pontiac fever and Legionnaires’ disease, a severe pneumonia named after an outbreak that resulted in 29 deaths following an American Legion Convention in Philadelphia in 1976. Legionella is naturally occurring water borne bacteria that can survive within building water systems and multiply under...

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Radon

Radon is a colourless, odourless gas that is released during the naturally-occurring, radioactive decay of uranium in rocks and soils. Radon levels outdoors are generally low; however, radon can enter buildings through cracks and openings in the foundation and levels can become much higher indoors, especially in basements and lower floors. Exposure to radon over time increases the risk of...

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Carbon Monoxide in Long-Term Care Facilities

Carbon monoxide (CO) is an odourless, colourless, and non-irritating gas that is harmful to humans. As a by-product of incomplete combustion, CO is produced by fuel-burning appliances including boilers, furnaces, fireplaces, kitchen stoves, and laundry dryers. Cigarette smoke and vehicle exhaust also contribute to indoor CO levels. At low levels of exposure, symptoms can include headache, nausea...

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Mould

Topics: Indoor Air

Mould is a ubiquitous fungus in outdoor environments that inevitably makes its way indoors. The general population is commonly exposed to mould through inhalation, and less commonly through direct contact, with no adverse effects. However, individuals with asthma or other underlying respiratory ailments may show sensitivity to mould or its cellular components that may trigger respiratory tract...

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