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Chapter 63 : Using Geographical Information Systems for Risk Assessment and Control of Legionnaires' Disease Associated with Cooling Towers
Using Geographical Information Systems for Risk Assessment and Control of Legionnaires' Disease Associated with Cooling Towers, Page 1 of 2< Previous page Next page > /docserver/preview/fulltext/10.1128/9781555817985/9781555812300_Chap63-1.gif /docserver/preview/fulltext/10.1128/9781555817985/9781555812300_Chap63-2.gif
The recent outbreak of Legionnaires' disease at the Melbourne Aquarium has prompted widespread comment by public health officials regarding testing for Legionella. Cooling tower maintenance and biocide dosage have been shown to be major contributors to risk management, and review papers have stated that with proper management, Legionella can be readily controlled. Regular cleaning regimens and inspection and review of the cooling towers and water treatment equipment are also important aspects of a control strategy. Operation of cooling towers and cooling water temperature has been shown to positively correlate with concentrations of Legionella in cooling towers. Prevailing weather conditions such as cloud cover, ultraviolet light intensity, air temperature, and relative humidity have been shown to influence the survival and dispersion of Legionellae in aerosol. Routine maintenance procedures by owner/operators and water treatment personnel could be electronically reported to the system and risk assessments for each system could be made.