Current trends in Microbiological Testing


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Current trends in Microbiological Testing

  1. 1. Physical Activity and Leisure Management Ltd POOL PLANT OPERATIONS INFORMATION UPDATE SEMINAR (on-line option)
  2. 2. Physical Activity and Leisure Management Ltd Module 5: Microbiological testing
  3. 3. 3 This module examines the current standards for microbiological testing, and the interpretation of results. Any actions always have to be the responsibility of the operator, so this advice can be invaluable. In this Module we will be focusing on:
  4. 4. 4 • Other Harmful Organisms found in Swimming Pools • Bacterial Sampling • Enforcement • Microbiological Testing • Dealing with Unsatisfactory Results
  5. 5. 5 Some of the other harmful organisms that can be found in swimming pools, include:- Pseudomonas Aeruginosas This is a parasitic virus that can be passed from human to human, in water. Its symptoms range from a mild ear ache or infection, respiratory difficulties, or to a very distressing rash that can affect any part of the body. It is easily destroyed by good disinfection, and so its presence indicates ‘poor’ disinfection. It is also one of the prescribed tests of a microbiological analysis.
  6. 6. 6 Pseudomonas aeruginosa
  7. 7. 7 Legionella Virus This is a virus that is transmitted in water vapour, and sprays. The effect is to the respiratory system, and can prove to be fatal in certain circumstances. The virus itself, enjoys conditions between 20 C and 60 C , in stored water areas. These include circulation dead- legs, standing water, etc. such as showers; spas; air-conditioning units; etc.
  8. 8. 8 LEGIONNELLA An ideal breeding ground for disease? • What about showers, wash-basins, etc? • Is there a Legionella Risk Assessment!
  9. 9. 9 Bacteriological sampling  In order to ensure compliance with H & S legislation, bacteriological sampling is required:  The responsibility for monitoring compliance with health and safety legislation at swimming pools falls to either the HSE or the local authority Environmental Health Departments (EHDs) depending upon the main activity of the premises.  Pools in educational establishments or pools controlled by a Local Authority are enforced by the Health & Safety Executive (HSE). Private pools, for example those in hotels, are the responsibility of EHDs.  However, it is the pool manager/operator who is RESPONSIBLE FOR ENSURING THAT MICROBIOLOGICAL TESTING IS CARRIED OUT
  10. 10. 10 Enforcement  Environmental Health Officers have right of entry into all pools under the Environmental Protection Act 1990 and therefore may undertake bacteriological sampling if they deem it necessary  Bacteriological sampling should be undertaken monthly as a constant check to ensure the bacteriological quality of a well run pool with the correct disinfection levels and pH value. Hydrotherapy pools should be sampled weekly.  More frequent samples are necessary where a deterioration in water quality occurs. Bacteriological samples
  11. 11. 11 Samples of pool water are incubated on an Agar Medium, for 24 hours at 37 C
  12. 12. 12 Microbiological Testing:  Plate (Aerobic Colony) Count: a sample of water is incubated for 24 hours at 37 C, to indicate the total number of organisms present. Acceptable results: no more than 10cfu/ml (colony forming units)
  13. 13. 13 Microbiological Testing:  Pseudomonas aeruginosas: - causes skin and ear infections (folliculitis) - they multiply in poorly disinfected areas - they can be found in spa pools, and where there is poor filter maintenance Acceptable results: totally absent!
  14. 14. 14 Microbiological Testing:  Faecal Coliforms (Escheria type 0157): - indicates the presence of faecal cysts that cannot be destroyed by chlorine - it can be PATHOGENIC - it inhabits the intestinal tract of mammals Acceptable results: totally absent!
  15. 15. 15 Dealing with Unsatisfactory Results. You must arrange to………….  Take another microbiological test immediately  Take chemical tests, on the poolside, and compare with laboratory test results  Review maintenance and pool water testing and recording processes, BUT ..........
  16. 16. 16 If the second microbiological test is unsatisfactory …….. ?  An investigation into the management and operating conditions of the pool can be undertaken with the Health authority; Environmental Health Dept., and other expert bodies.  The pool can be closed until all parties are satisfied with the management processes.
  17. 17. Carlton Associates Ltd (c) 2013 That is the end of Module 5 What you need to do now: 1. Return to the course page 2. Download the module update notes and save them on your computer 3. Read through the notes 4. Print out the notes and insert them in your manual
  18. 18. Carlton Associates Ltd (c) 2013 End of Module 5 Presentation