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Legionella: En risk som bör beaktas ombord?
Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
2012 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Legionellabakterien orsakar den så kallade legionärssjukan vilken är en form av lunginflammation med hög dödlighet. Bakterien lever i färskvatten och finns naturligt i våra sjöar och vattendrag. Enligt Smittskyddsinstitutet trivs Legionellabakterien i temperaturintervallet 20°C till 42°C med en optimal tillväxt vid 35°C, bakterien lever dock redan från 0°C. Vi har i denna undersökning försökt utreda om legionella kan vara en risk ombord i fartyg. Eftersom tester för förekomsten av legionellabakterier inte ingår i de krav som ställs på dricksvattenkvaliteten ombord, har vi kontaktat fem rederier för att fråga om de har utfört några utökade tester där legionella ingår. Av dessa fem rederier hade tre aldrig testat sitt dricksvatten för legionella och två hade testat och påträffat legionella. Då många av de komponenter som ingår i dricksvattenförsörjningen var placerade i maskinrummet där en omgivningstemperatur mellan 20°C - 42°C var vanligt förekommande, och det faktum att dricksvattensystemen ombord ofta var långa med många tappställen som kunde ge upphov till stillastående vatten, kunde det konstateras att legionella mycket väl kan vara en risk ombord.     

Abstract [en]

The Legionella bacteria cause the so called Legionnaires' disease which is a form of pneumonia with high mortality. The bacterium lives naturally in freshwater lakes and other freshwater sources. According to Smittskyddsinstitutet the bacteria thrives in the temperature interval 20°C - 42°C with an optimal growth at 35°C. However, the bacteria can live in temperatures down to 0°C. In this study we have tried to determine if legionella could be a risk onboard ships. Since testing for legionella bacterium is not required according to regulations, we decided to contact five shipping companies in order to establish if they have ever taken any tests for legionella. Three of those shipping companies had never tested for legionella the other two had tested and found legionella in their drinking water system. Since many components included in the drinking water system were placed in the engine room where the ambient air temperature usually is between 20°C - 42°C, and the fact that the drinking water system often includes long piping’s and many consumers which can lead to standing water, we could conclude that legionella very well could be a risk onboard.    

Place, publisher, year, edition, pages
2012. , 35 p.
Keyword [sv]
Legionella, Dricksvatten, Fartyg
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-18444OAI: oai:DiVA.org:lnu-18444DiVA: diva2:517465
Subject / course
Chief Engineer
Educational program
Marine Engineering Programme (3 years), 180 credits
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-05-24 Created: 2012-04-23 Last updated: 2012-05-24Bibliographically approved

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CiteExportLink to record
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