Methods for preventing XXXX .

@entity505 @entity1 @entity2782 @entity3878
This outbreak highlights a number of significant factors related to most @entity2782 outbreaks. The bath water had not been changed in more than four weeks which led to a build-up of high levels of organic @entity505 . There was an extended interval of six days between subsequent OTD @entity3878 residual tests, allowing the @entity3878 residual to decrease to low levels between tests. It should also be noted that the OTD test, by design, measures both the active free @entity3878 and the inactive combined @entity3878 residual. Therefore OTD residual readings in the low normal range may actually represent below normal free active @entity3878 residual levels. The following measures are suggested to reduce the growth of pseudomonads in hot tubs and whirlpool baths and to prevent subsequent cases of @entity2782 : 1. The OTD @entity3878 residual should be checked every day. The residual should be well above the minimum level suggested for the bath. Or, preferably, an automatic chlorinator should be installed. This device measures the free @entity3878 residual and automatically adds @entity3878 to keep the residual in the desired range. 2. The water in the bath should be changed at least every eight weeks in order to reduce the total organic @entity505 level. The water should be changed more frequently if the bath is used by a large number of @entity1 . 3. If an outbreak of @entity2782 is associated with a bath, the water should be changed and the bath washed with a @entity3878 -based solution. Also, the method of keeping the @entity3878 residual in the operating range should be re-evaluated.
