legionella pneumophila Articles

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by Independent International Consultants Ltd (IIC)  (Feb. 16, 2006)

Nomenclature Legionnaires' disease a pneumonia caused by any serogroup or sub-group of Legionella pneumophila Legionella pneumonia a pneumonia caused by any species of Legionella Pontiac Fever an acute, self-limiting, “flu-like” illness caused by certain species of Legionella Legionellosis any human ...

Enumeration of Legionella pneumophila in cooling tower water systems

by Springer  (Jan. 1, 2005)

Legionella pneumophila, the causative agent of Legionnaires disease, is known to colonise and frequently grow in cooling tower waters. Disease is acquired by inhaling aerosol contaminated by legionellae. Determination of the count of Legionella pneumophila in cooling tower waters may, therefore, be useful for risk assessment. In our survey, 103 ...

Legionnaires’ disease (Legionella pneumophila)-sometimes deadly, sometimes not!

by Atlantic Environmental, Inc.  (Sep. 10, 2010)

More than 90% of Legionella cases are caused by Legionella pneumophila, a bacterium that thrives in warm to hot water.  Pipes, tanks, faucets, showerheads, and hot water heaters are ideal breeding grounds for L. pneumophila.  Since infection with Legionella occurs through inhaling the bacterium, any activity in which contaminated water ...

Cooling tower legionella pneumophila study CDC

by Zentox Corporation  (Apr. 21, 2012)

Abstract Since the late 1970s, there have been many small and large outbreaks of Legionnaires’ disease. Most of these outbreaks have been traced to either cooling tower water systems or potable water systems. Although the bacteria most often associated with Legionnair’s disease, Legionella pneumophila, is present in many waater ...

Amoebae and Legionella pneumophila in saline environments

by IWA Publishing  (Mar. 1, 2011)

Amoeboid protists that harbor bacterial pathogens are of significant interest as potential reservoirs of disease-causing organisms in the environment, but little is known about them in marine and other saline environments. We enriched amoeba cultures from sediments from four sites in the New England estuarine system of Mt. Hope Bay, Massachusetts ...

A pcr-based method for monitoring legionella pneumophila in water samples detects viable but noncultivable legionellae that can recover their cultivability

by American Society for Microbiology  (Aug. 1, 2008)

Legionella pneumophila is the causative agent of Legionnaires' disease. This bacterium is ubiquitous in aqueous environments and uses amoebae as an intracellular replicative niche. Real-time PCR has been developed for rapid detection of Legionella DNA in water samples. In addition to culturable bacteria, this method may also detect dead and ...

Legionella Prevention

by Danish Clean Water A/S - Danfoss A/S  (Sep. 1, 2010)

Legionella Pneumophila Legionella has been identified as a major problem in multioccupancy buildings such as hotels, hospitals, hostels, schools, military establishments, nursing homes and office blocks. Worldwide thousands of people become seriously ill or die through infection by this potentially deadly disease. The costs if a buildings water ...

Proteomic regulation during Legionella pneumophila biofilm development: decrease of virulence factors and enhancement of response to oxidative stress

by IWA Publishing  (Jun. 18, 2014)

Legionella pneumophila (L. pneumophila) is a Gram-negative bacterium, which can be found worldwide in aquatic environments. It tends to persist because it is often protected within biofilms or amoebae. L. pneumophila biofilms have a major impact on water systems, making the understanding of the bacterial physiological adaptation in biofilms a ...

Legionella pneumophila serogroup 3 prevalence in drinking water survey in Israel (2003–2007)

by IWA Publishing  (Dec. 1, 2010)

A 5-year survey (2003 to 2007) was carried out on various drinking water sources in Israel for detection of Legionella spp. The most frequently isolated species was L. pneumophila serogroup 3 (prevalence 60.44±5.6) followed by L. pneumophila serogroup 1 (26.98±5.2) and other serogroups and unidentified species (12.6±9.8). L. pneumophila serogroup ...

Monochloramine and chlorine dioxide for controlling Legionella pneumophila contamination: biocide levels and disinfection by-product formation in hospital water networks

by IWA Publishing  (Dec. 11, 2013)

Legionella colonization in hospital hot water distribution networks was evaluated following 36 months of continuous treatment with monochloramine and compared with chlorine dioxide. Nitrite, nitrate, chlorite, chlorate, bromide, trihalomethanes and haloacetic acids as well as the biocide concentration at sampled points were measured. Only 8/84 ...

The presence of opportunistic pathogens, Legionella spp., L. pneumophila and Mycobacterium avium complex, in South Australian reuse water distribution pipelines

by IWA Publishing  (Jun. 8, 2015)

Water reuse has become increasingly important for sustainable water management. Currently, its application is primarily constrained by the potential health risks. Presently there is limited knowledge regarding the presence and fate of opportunistic pathogens along reuse water distribution pipelines. In this study opportunistic human pathogens ...

Raising awareness to prevent legionella

by Hughes Safety Showers  (Jul. 20, 2007)

Understanding the dangers of contracting legionella Understanding certain facts about legionella is essential when selecting and furthermore maintaining emergency safety showers and eyebath/facewash units. Hughes equipment is designed to minimise the risk of legionella. “Employers are legally responsible for the health and safety of their ...

Strategies for the reduction of Legionella in biological treatment systems

by IWA Publishing  (Jun. 2, 2016)

A community-wide outbreak of Legionnaire's disease occurred in Warstein, Germany, in August 2013. The epidemic strain, Legionella pneumophila Serogruppe 1, was isolated from an industrial wastewater stream entering the municipal wastewater treatment plant (WWTP) in Wartein, the WWTP itself, the river Wäster and air/water samples from an ...

Controlling scale in water systems helps prevent legionella

by Scalewatcher North America Inc.  (Sep. 18, 2012)

The Legionella bacterium, Legionella Pneumophila (LP), the fundamental agent of Legionnaire’s Disease, is a water-based organism, which causes infection when inhaled in an aerosol form. Legionnaires' Disease acquired its name in 1976 when an outbreak of pneumonia occurred among persons attending a convention of the American Legion in ...

Typing of Legionella strains isolated from environmental samples in Crete, Greece, during the period 2004–2011

by IWA Publishing  (Dec. 11, 2013)

In Greece, standard tests are performed in watering and cooling systems of hotels. A total of 1,494 water samples were collected during 2004–2011 from 124 hotels from four regions in Crete (Greece). Samples were tested for the presence of Legionella spp.; 103 isolates were identified and typed by polymerase chain reaction (PCR)-sequencing ...

A New Field Method for Enumerating Viable Legionella And Total Heterotrophic Aerobic Bacteria

by Phigenics, LLC  (Jan. 1, 2007)

Presentation at the 2007 Association of Water Technologies Convention and Exposition ABSTRACT A new field method for the quantitative determination of viable Legionella and total heterotrophic aerobic bacteria was evaluated in hundreds of laboratory experiments and from analysis of over two thousand field samplers in actual operating conditions. ...

Cooling Technology Institute - A new method to measure viable Legionella and total heterotrophic aerobic bacteria.

by Phigenics, LLC  (Feb. 1, 2008)

A new field method to measure viable Legionella and total heterotrophic aerobic bacteria was evaluated in the laboratory, in split-sample blinded comparisons and in actual operating field conditions. The method was proven reliable for determining viable cell concentrations of Legionella pneumophila serogroup 1, serogroups 2-14 and Legionella ...

Chemical disinfection of Legionella in hot water systems biofilm: a pilot-scale 1 study

by IWA Publishing  (Jan. 1, 2011)

Legionella bacteria encounter optimum growing conditions in hot water systems and cooling towers. A pilot-scale 1 unit was built in order to study the biofilm disinfection. It consisted of two identical loops, one used as a control and the other as a ‘Test Loop’. A combination of a bio-detergent and a biocide (hydrogen peroxide + peracetic acid) ...

Detection of Legionella by cultivation and quantitative real-time polymerase chain reaction in biological waste water treatment plants in Norway

by IWA Publishing  (Sep. 25, 2014)

Cases of Legionnaires' disease associated with biological treatment plants (BTPs) have been reported in six countries between 1997 and 2010. However, knowledge about the occurrence of Legionella in BTPs is scarce. Hence, we undertook a qualitative and quantitative screening for Legionella in BTPs treating waste water from municipalities ...

Controlling Legionella and Pseudomonas aeruginosa re-growth in therapeutic spas: implementation of physical disinfection treatments, including UV/ultrafiltration, in a respiratory hydrotherapy system

by IWA Publishing  (Jun. 1, 2015)

The study aimed to assess the efficacy of an integrated water safety plan (WSP) in controlling Legionella re-growth in a respiratory hydrotherapy system located in a spa centre, supplied with sulphurous water, which was initially colonized by Legionella pneumophila. Heterotrophic plate counts, Pseudomonas aeruginosa, Legionella spp. were ...

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