Inactivation of Vegetative Cells, but Not Spores, of Bacillus anthracis , B. cereus , and B. subtilis on Stainless Steel Surfaces Coated with an Antimicrobial Silver- and Zinc-Containing Zeolite Formulation

Stainless steel surfaces coated with paints containing a silver- and zinc-containing zeolite (AgION antimicrobial) were assayed in comparison to uncoated stainless steel for antimicrobial activity against vegetative cells and spores of three Bacillus species, namely, B. anthracis Sterne, B. cereus T, and B. subtilis 168. Under the test conditions (25 degrees C and 80% relative humidity), the zeolite coating produced approximately 3 log(10) inactivation of vegetative cells within a 5- to 24-h period, but viability of spores of the three species was not significantly affected.