A note on legionellas in whirlpools

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Abstract
Water samples from 52 whirlpools (jacuzzi) water temperature 35-40.degree. C, and from 50 swimming pools, water temperature 8-30.degree. C, were investigated for the presence of Legionella pneumophila. This was isolated from 11 of 28 whirlpools with free available C < 0.3 mg/l. No legionellas were detected in 23 whirlpools with free available Cl-< 0.3 mg/1. L. pneumophila was found in 2 swimming pools; 0.3 mg/1 of free available Cl is sufficient to eliminate legionellas from whirlpools.