Opportunistic pathogens Mycobacterium avium complex (MAC) and Legionella spp. colonise model shower

Harriet Whiley, Steven Giglio, Richard Bentham

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Legionella spp. and Mycobacterium avium complex (MAC) are opportunistic pathogens of public health concern. Hot water systems, including showers, have been identified as a potential source of infection. This paper describes the colonization of Legionella and MAC on the flexible tubing within a model potable shower system, utilizing thermostatic mixing and a flexible shower head. A MAC qPCR method of enumeration was also developed. MAC and Legionella spp. were detected within the biofilm at maximum concentrations of 7.0 × 104 and 2.0 × 103 copies/cm2 PVC tubing respectively. No significant changes were observed between sample of the flexible shower tubing that dried between uses and those that remained filled with water. This suggested the “unhooking” showerheads and allowing them to dry is not an effective method to reduce the risk of Legionella or MAC colonisation.

    Original languageEnglish
    Pages (from-to)590-598
    Number of pages9
    JournalPathogens
    Volume4
    Issue number3
    DOIs
    Publication statusPublished - 24 Jul 2015

    Keywords

    • Biofilm
    • Legionella pneumophila
    • Legionella spp.
    • Model
    • Mycobacterium avium complex (MAC)
    • Non-tuberculous mycobacterium (NTM)
    • Potable water
    • Showers

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