Do iodine water purification tablets provide an effective barrier against Cryptosporidium parvum?

Abstract:

:U.S. Army Iodine Water Purification Tablets were tested to determine their efficacy against Cryptosporidium parvum, a protozoan resistant to chemical disinfection. Purified oocysts in phosphate-buffered water were treated with varying concentrations of iodine or with iodine tablets as per U.S. Army protocol. Neonatal mouse pups were then each inoculated with 10,000 treated oocysts, and 1 week later scored as infected or uninfected. Using this methodology, iodine tablets were found to be inadequate against C. parvum because the Army doctrinal dose of 560 mg min/L, calculated as 16 mg of I2/L and 35 minutes of contact time, showed less than 1 log inactivation. A dose of 29 mg of I2/L at the same contact time was required to achieve a 2 log inactivation.

journal_name

Mil Med

journal_title

Military medicine

authors

Butkus MA,Starke JA,Bowman DD,Labare M,Fogarty EA,Lucio-Forster A,Barbi J,Jenkins MB,Pavlo M

doi

10.7205/milmed.170.1.83

keywords:

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

83-6

issue

1

eissn

0026-4075

issn

1930-613X

journal_volume

170

pub_type

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