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 I 2/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.
Original language | English (US) |
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Pages (from-to) | 83-86 |
Number of pages | 4 |
Journal | Military medicine |
Volume | 170 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2005 |
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health