Recurrence, microevolution, and spatiotemporal dynamics of Legionella pneumophila sequence type 1905, Portugal, 2014–2022

Published on 04/22/2024 | by Waterline Admin

Manageiro V, Borges V, Rodrigues R, Bettencourt C, Silva C, Gomes JP, Gonçalves P.

Highlights:

  • The Vila Franca de Xira outbreak in Portugal is one of the largest reported of LD (>400 cases and 14 deaths)
  • The outbreak was associated with ST 1905 of L. pneumophila subspecies fraseri serogroup 1 strain, which probably originated from a local industrial cooling tower.
  • The results strongly indicate that ST1905 strain is potentially persistent in diverse and geographically dispersed environments, far beyond the 2014 outbreak in Vila Franca de Xira.
  • The authors observed traits which raise additional uncertainties regarding the ST1905 strain and its ability to further adapt and persist in the environment and, ultimately, cause human disease.
  • They cannot make conclusions about a potential adaptive role of the observed mutations, but it has been hypothesized that mutations found exclusively in clinical isolates, as in their study, might reflect human-specific adaptation.

Read more here.

Diary Dates & Events

Grime Scene

ANNOUNCING OUR NEW GRIME SCENE COMPETITION:

Following on from the successful Grime Scene competition, we have decided to continue the theme for another year, but with a twist. This year, we are asking for photographs of the grimiest pictures you can find accompanied with another photograph of how the ‘scene’ has been improved by your maintenance or cleaning.


We will display the photographs in each of the Waterline editions throughout 2024. The ‘most improved’ picture will be chosen by WMSoc members via an online vote. The winner will receive a £25 Amazon Gift Voucher after the Winter 2024/25 edition has been published.


Please send your photographs to:
[email protected].


Product & Service Spotlight

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Independent tests confirm its efficacy, achieving a 5 log reduction within 5 minutes. Proven to prevent Legionella growth, Multitreat SHD ensures peace of mind by addressing scale buildup quickly.

Customer feedback and laboratory tests validate its reliability.

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How the NEW SolidTek® Biocide Feeder Package will BENEFIT YOU

SolidTek® has launched its NEW Biocide Feeder which is functional, compact, and environmentally-friendly.

Designed for use with SolidTek’s® enhanced bromine biocide, BromTek, it offers multiple benefits:

SAFER
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Use with field proven mixed hydantoin biocide - better performance than standard bromine tablets.

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Charge with product in under 5 minutes without isolation from the system.
SUPPORT

Product calculators and tech support available.

Lovibond MD640 Photometer (PTSA & Fluorescein capable)

Product Spotlight Drop Test Kits

How many times have you heard … ‘we’re not sure what the system volume is’. A common problem which can be expensive - wasting chemical over dosing, or underdosing so the treatment is ineffective (i.e. shock dosing a biocide). The MD640 photometer has PTSA & Fluorescein capability built in. Simply use our System Checkers to add to an unknown system and read a PTSA or Fluorescein levels to accurately identify the system volume.

The Hydrosense PRO range

Hydrosense

The Hydrosense PRO range pioneers Legionella pneumophila detection, the cause of over 97% of Legionnaires’ disease outbreaks, by identifying all the serogroups 1-15 of this dangerous Legionella species. This easy-to-use, highly sensitive test uses unique filtration, offering a three-line test result that distinguishes between serogroup 1 and serogroups 2-15 within 25 minutes. The water test has a level of detection of 100 CFU/L and swab tests detect 200 CFU per swabbed area, providing crucial, rapid insights for water safety management.

TME Thermometers

Save time and money on your ACoPL8 testing with TME’s innovative legionella solutions.
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• Visit our NEW website for 25% OFF all online orders placed by 30th June 2024.

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