Legionella in Puerto Rico cooling towers

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Description

Water samples from air conditioning cooling towers receiving different treatment protocols on five large municipal buildings in San Juan, Puerto Rico were assayed for various species and serogroups of Legionella spp. using direct immunofluorescence. Several water quality parameters were also measured with each sample. Guinea pigs were inoculated with water samples to confirm pathogenicity and recover viable organisms. Legionella pneumophila (1-6), L. bozemanii, L. micdadei, L. dumoffii, and L. gormanii were observed in at least one of the cooling towers. L. pneumophila was the most abundant species, reaching 10{sup 5} cells/ml, within the range that is considered potentially pathogenic to ... continued below

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18 p.

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Negron-Alviro, A.; Perez-Suarez, I. & Hazen, T. C. Spring 1988.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 16 times . More information about this report can be viewed below.

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  • Savannah River Laboratory
    Publisher Info: E.I. du Pont de Nemours and Co., Savannah River Lab., Aiken, SC (United States)
    Place of Publication: Aiken, South Carolina

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Description

Water samples from air conditioning cooling towers receiving different treatment protocols on five large municipal buildings in San Juan, Puerto Rico were assayed for various species and serogroups of Legionella spp. using direct immunofluorescence. Several water quality parameters were also measured with each sample. Guinea pigs were inoculated with water samples to confirm pathogenicity and recover viable organisms. Legionella pneumophila (1-6), L. bozemanii, L. micdadei, L. dumoffii, and L. gormanii were observed in at least one of the cooling towers. L. pneumophila was the most abundant species, reaching 10{sup 5} cells/ml, within the range that is considered potentially pathogenic to humans. A significantly higher density of L. pneumophila was observed in the cooling tower water that was not being treated with biocides. Percent respiration (INT) and total cell activity (AODC), were inversely correlated with bacterial density. This study demonstrates that Legionella spp. are present in tropical air-conditioning cooling systems, and without continuous biocide treatment may reach densities that present a health risk.

Physical Description

18 p.

Notes

OSTI as DE99002906

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  • Other Information: PBD: [1988]

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  • Other: DE99002906
  • Report No.: DP-MS--88-9
  • Grant Number: AC09-89SR18035;AC09-76SR00001
  • DOI: 10.2172/353374 | External Link
  • Office of Scientific & Technical Information Report Number: 353374
  • Archival Resource Key: ark:/67531/metadc676082

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • Spring 1988

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • March 23, 2016, 11:10 a.m.

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Negron-Alviro, A.; Perez-Suarez, I. & Hazen, T. C. Legionella in Puerto Rico cooling towers, report, Spring 1988; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc676082/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.