![]() For example, if the objective is to confirm the source of a Legionellosis outbreak, then the CDC recommends spread plate culture tests for a set of bulk water and biofilm swab samples 1 from the cooling towerĬDC Sampling Procedure and Potential Sampling Sites – Cooling Towers 2Ĭonfirm the efficacy of the biocide treatment program in a cooling water Selecting the optimal sample type and location depends on the objective of the legionella testing. ![]() Monitoring for legionella bacteria includes identifying the optimal samples and sample locations. There is no correlation between the population of sessile and/or planktonic HPC bacteria and Legionella pneumophila bacteria however, the presence of sessile anaerobic bacteria (“slime”) is an indication that the environmental conditions may be conducive to the proliferation of legionella bacteria because the legionella bacteria require a symbiotic relationship with a host organism such as an amoeba or protozoa to reproduce. Monitoring for legionella bacteria includes monitoring sessile bacteria. The next blogpost will review the fourth thing that you should know – how to choose one of the currently-commercialized laboratory and/or field tests for legionella bacteria. This blogpost will review the first three things that you should know if you must test your water for legionella bacteria.
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