Aerosol-phase Activity of Iodine Captured from a Triiodide Resin Filter on Fine Particles Containing an Infectious Virus
AIR FORCE CIVIL ENGINEER CENTER (DETACHMENT 1 EAST) TYNDALL AFB FL READINESS DIR
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The triiodide form of an anion-exchange resin an effective antimicrobial in water is claimer to attenuate infectivity of airborne microorganisms. However, attempts to evaluate the effect of passage through a filter medium containing the triiodide resin were impeded by reactions of iodine with proteins during collection and with water during analysis. Aerosols of MS2 coli phage were passed through control P100 and iodinated HEPA media, collected in plastic bags, incubated for 0 10 min, collected in an impinger containing thiosulfate to consume unreacted iodine, plated and enumerated. Comparison of viable counts demonstrated antimicrobial activity with an apparent half-life in tens of seconds. Antimicrobial effectiveness increased with relative humidity. Absorption of iodine by the bags eliminated reaction with free iodine as a contributing mechanism. The iodinated medium appears to have possible use in collective, but likely not individual, protection.
- Medicine and Medical Research
- Inorganic Chemistry