until use.Preparation of InoculumThe procedure of Sommers and Thayer (2000) for inoculation, irradiation,and enumeration of bacteria was utilized. Each bacterial strain was cul-tured independently in 100mL Tryptic Soy Broth (BBL/Difco Laboratories,Sparks,MD) in baffled 500mL Erlenmeyer culture flasks at 37◦C (150 rpm)
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