Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Water sanitation for the prevention of Legionellosis in a large academic medical center

Bhatte, Neeti (2015) Water sanitation for the prevention of Legionellosis in a large academic medical center. Master Essay, University of Pittsburgh.

[img] Microsoft Word
Primary Text
Available under License : See the attached license file.

Download (398kB)
[img] Plain Text (licence)
Available under License : See the attached license file.

Download (1kB)


Legionella pneumophila is a bacterium that can cause severe pneumonia by exposure to contaminated water. It is relatively resistant to common water disinfection, so additional prevention measures for healthcare water systems are needed to prevent Legionellosis in severely-ill and immune compromised patients. In the United States, copper silver ionization and chlorine are the most common systems for water disinfection. University of Pittsburgh Medical Center Mercy was the first large medical system in the United States to use monochloramine for Legionella water disinfection for over four years now. This paper is a descriptive and long-term retrospective study of Legionella water disinfection that shows the effectiveness of monochloramine treatment on a large academic medical center water system since its installation in 2011. Legionella water culture data collected by the Mercy Microbiology Laboratory began in March 2011 at UPMC Mercy and is currently an ongoing project. This data is unique as it is the longest follow up data available in the United States. It is collected by the Mercy Microbiology Lab as well as the Special Pathogens Laboratory for UPMC. The paper will include a review of general water treatment methods and the importance of supplementary treatment for Legionella at healthcare facilities. The methods will include the overall plan for Legionella water culture frequency used at UPMC Mercy based on risk assessment, different methodologies of water culture that were studied in the same institution, and the protocols followed for positive cultures and complications that were faced while the treatment was in place at the medical center. The practical lessons learned and the results are of significant importance to public health as well as healthcare precautions. This study also helped address the risk assessment for frequency of Legionella testing and different methods of testing, so it has also been a catalyst for a more controlled and consistent method of treatment in state and county health regulations. Further studies may include eliminating any complications associated with the use of monochloramine and considering a monochloramine treatment system for city-wide or other widespread area usage.


Social Networking:
Share |


Item Type: Other Thesis, Dissertation, or Long Paper (Master Essay)
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Bhatte, Neetinhb7@pitt.eduNHB7
ContributionContributors NameEmailPitt UsernameORCID
Committee ChairKingsley, Lawrencekingsley@pitt.eduKINGSLEYUNSPECIFIED
Committee MemberYassin, Mohamedyassinm@upmc.eduUNSPECIFIEDUNSPECIFIED
Date: 2015
Date Type: Submission
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Publisher: University of Pittsburgh
Institution: University of Pittsburgh
Schools and Programs: School of Public Health > Infectious Diseases and Microbiology
Degree: MPH - Master of Public Health
Thesis Type: Master Essay
Refereed: Yes
Date Deposited: 20 May 2016 15:43
Last Modified: 30 Mar 2022 10:56


Monthly Views for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item