Five strains each of nalidixic acid-adapted E. coli O157:H7 and S. Typhimurium DT 104 142 were obtained from either the USDA Animal and Research Center or the University of Georgia 143 Center for Food Safety (CFS).
Five strains each of nalidixic acid-adapted E. coli O157:H7 and S. Typhimurium DT 104142 were obtained from either the USDA Animal and Research Center or the University of Georgia143 Center for Food Safety (CFS).