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Biological hazard examples
Infections and disease are caused by certain types of micro-organisms that become hazardous to health
when environmental conditions allow their populations to expand rapidly. Bacterial cultures thrive where
there's poor hygeine, warm temperatures and moisture present. The pictures below were all taken at businesses
in Leeds. They show just the sort of ideal conditions for micro-organisms to spread and grow to dangerous levels.
Legionnellae
Legionnaires disease is a serious and potentially fatal illness caused by Legionella bacteria.
Legionellae are widespread and commonly found in natural water systems.
People can become infected through breathing tiny droplets of water contaminated with the bacteria, so
Legionellae can be very dangerous if they get into artificial water systems such
as air-conditioning or hot and cold water services. Controlling bacteria in these systems
requires constant monitoring and special water treatment methods.
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