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Antimicrobial susceptibility of Salmonella enterica serotype Typhimurium definitive phage type (DT) 12 and DT 120 isolates, England and Wales, 1991–2000. A, S. Typhimurium DT 12; B, S. Typhimurium DT 120. Clear bar, sensitive; diagonal screened bar, resistance to ampicillin, chloramphenicol, streptomycin, sulfonamides, and tetracyclines (ACSSuT; includes resistant-type ACSSuT and ACSSuT plus additional resistances to Tm, CpL, or both); black bar, other resistance patterns.
