Identification of non-tuberculous mycobacteria in hospital waters

Published on 02/11/2019 | by Phil Ricardo

A new proficiency scheme for laboratories testing hospital waters for environmental mycobacteria, and species such as Mycobacterium chimaera, Mycobacterium avium and Mycobacterium intracellulare which do not cause tuberculosis but may cause infection in patients with underlying disease – is to be launched in April 2019. The scheme, organised by PHE’s Food and Environmental Proficiency Testing Unit (FEPTU), aims to raise awareness of laboratory testing methods, highlight challenges in isolation, and assist with interpretation of results.

Environmental mycobacteria may be of concern when they occur in the final rinse-water of instruments, such as endoscopes, that are used for diagnosis. These waters need to be free of environmental mycobacteria and therefore regular testing for environmental, non-pathogenic mycobacteria is a well-established practice [1].

More recently, a specific type of hospital water (from heater-cooler units) has been associated with non-tuberculous mycobacteria. M. chimaera, M. avium and M. intracellulare are slow-growing non-tuberculous mycobacteria (NTM) within the Mycobacterium avium complex (MAC). M. chimaera was originally thought to be less pathogenic than other species within MAC; however, since 2011, cases of invasive infection caused by M. chimaera have been reported in several European countries, including the UK, in patients who had previously undergone cardiac surgery.

Following a national UK investigation to assess the risk of invasive infection in cardiothoracic surgery, a significantly elevated risk was identified in those post-surgery compared to the general population [2]. In 2015, the European Centre for Disease Prevention and Control (ECDC) issued a protocol for case detection, laboratory diagnosis and environmental testing of M. chimaera infections potentially associated with heater-cooler units used in cardiovascular surgery [3]. The risk of infection following surgery remains low in the UK.

PHE supports hospitals in their environmental monitoring of endoscopy and heater-cooler waters for environmental mycobacteria and NTMs in several ways; this includes: provision of a hospital water testing service, provided by the Food, Water and Environmental Laboratory Network (FW&E): provision of laboratory control strains by the National Collection of Type Cultures (NCTC); and, now, through the provision of a proficiency testing scheme from the Food and Environmental Proficiency Testing Unit (FEPTU).

https://www.gov.uk/government/publications/health-protection-report-volume-13-2019/hpr-volume-13-issue-5-news-8-february#identification-of-non-tuberculous-mycobacteria-in-hospital-waters

Grime Scene

Grime Scene



Click the gallery image above to view our Grime Scenes!


Diary Dates & Events

NEW EVENTS INFORMATION COMING SOON!

WMSoc. Training

WE ARE C&G ACCREDITED!



Specialist training for all aspects of legionella & water treatment.




GET TRAINED.
GET CERTIFIED.
GET WMSoc. TRAINING.

Product Spotlight

PrimeLab Photometer

The PrimeLab photometer hand-held Bluetooth® device is expandable and portable, developed for ultimate flexibility for use in a range of water systems. With only one light source and the JENCOLOR multi-spectral sensor used exclusively in the PrimeLab, it is possible to measure all water parameters where the water sample is visibly discoloured after addition of a reagent. Key Features of PrimeLab Photometer: The first and only PrimeLab photometer with just 1 LED / 1 JENCOLOR sensor, covering the 400 wavelength (380nm-780nm). More than a 100 different parameters available. Activation of add-on parameters is possible even after purchase. Powerful PC-software and app with free cloud service. Creating reports and dosage recommendations by just a click, using your individual water treatment chemicals.

HuwaSan TR50 Silver Stabilised Hydrogen Peroxide

HuwaSan TR50 is a commercial water disinfectant and biocide designed for shock disinfection or constant dosing. HuwaSan TR50 kills legionella bacteria and in addition removes biofilm. It is safer to use than chlorine as the disinfection breakdown products are oxygen and water. Independent testing shows that HuwaSan TR50 provides a very wide spectrum of biocidal activity against bacteria, viruses, spores, fungi, amoebae (such as amoeba acanthus which can act as a host to legionella bacteria) and algae.

MC1+ Protector

Formulated to prevent wear and tear and the resulting debris, MC1+ stops magnetite and other deposits forming. As it does this, it protects the central heating, keeping the boiler working efficiently and helping to ensure the system lasts for longer.

MM2050 - PT100 Thermometer

Four/three/two wire measurement, Max/min functions, Hold function, Dual display, °C/°F/°A selectable, Simultaneous display of real time and max/min/hold measurement, Self calibrating.

MD610 Photometer

The MD610 gives you a mobile device in a modern design with the analytical features of a laboratory photometer. All important water analysis parameters from A(luminium) to Z(inc) are covered. Combined with the high precision of Lovibond® reagents, a reliable and quick analysis of water samples is guaranteed. Reagent tablets, powder reagents, liquid reagents, or cuvette tests are used depending on the method.

Armitage Shanks Markwik 21

Markwik21

(TB H2a) an integral thermostatic bib mixer tap, single long lever mixer. Single flow fixed horizontal nozzle, sequential operation. Sequential operation ensures both hot and cold supply are purged on each use, long lever gives precise control. Insulated technology keeps the ‘hot’ side of the mixer at a safe surface temperature.

AS Shower chrome

AS Shower chrome

Legionnaires‘ disease is usually spread by the breathing in of water vapour containing Legionella bacteria which is then deposited on the lungs. The bacteria thrives in water temperatures between 25 and 45°C and so showers by their very nature create an ideal environment for the bacteria to spread. The AS SHOWER chrome filter provides reliable and immediate protection against Legionella, removing bacteria at the point of use, allowing users to shower safely.