Control of protozoa and protozoan cysts that harbor legionella
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United States of America Patent
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Jun 17, 2003
Issued Date -
N/A
app pub date -
Jun 10, 2002
filing date -
Jun 10, 2002
priority date (Note) -
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Abstract
A method of controlling protozoa trophozoite and cysts is disclosed, comprising administering a phosphonium salt of the formula: (R.sub.1).sub.3 P.sup.- R.sub.2.X.sup.-, wherein R.sub.1 is an alkyl group having from 1-8 carbons and R.sub.2 is a chain substituent having 6-20 carbons, to aqueous systems harboring protozoa trophozoites and cysts. Addition of such phosphonium salts to aqueous systems was found to be effective at killing both the protozoa trophozoites and cysts. By effectively killing both the protozoa trophozoites and cysts, organism such as Legionella cells harbored in both the trophozoites and cysts are killed.
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