The TSB wash was serially diluted in sterile 0.1% peptonewater, and
duplicate 0.1-ml samples and quadruplicate 0.25-ml samples (undiluted
homogenate) were spread-plated on tryptic soy agar (TSA;
BBL/Difco), mannitol egg yolk polymyxin agar (MYPA; Hangang,
Gunpo, Republic of Korea), and Dichloran Rose Bengal Chloramphenicol
(DRBC) agar (BBL/Difco) to determine populations of MAB,
B. cereus, andMY, respectively. TSA and MYPA plates were incubated
at 30 C for 24 h and DRBC plates