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Water Treatment Measures in Control of Amebiasis

Any discussion of amebiasis certainly ought to include what we know about our water treatment processes, insofar as their ability to destroy or remove the cysts is concerned. What I would like to do is present a general review of what is known about most of the processes that are used presently, and at the same time about other procedures that were tested, particularly during the war, in the attempt to find a more suitable and effective cysticidal treatment. I shall attempt to credit only some of the various sources.

I would like to discuss this subject from two approaches; namely, large-scale or municipal water supplies, and the small-scale, portable, or individual water supplies. With the former, the municipal supplies, one of the first treatments that is usually used is that of sedimentation. This is essentially a mechanical procedure in which it is anticipated that, with an adequate detention period, some of the larger particles may settle out.

¹ National Institutes of Health, U. S. Public Health Service, Bethesda, Maryland.