Multidrug-ResistantSalmonella entericaSerotype Typhimurium Infections

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Abstract
Glynn et al. (May 7 issue)1 have shown that infections due to a strain of Salmonella enterica serotype typhimurium, known as definitive type 104 (DT104), that is resistant to ampicillin, chloramphenicol, streptomycin, sulfonamides, and tetracycline have increased in the past 15 years in the United States. The authors mention that “no one method . . . is capable of identifying five-drug–resistant typhimurium DT104” and suggest the use of screening “for resistance to chloramphenicol . . . for identifying isolates with the five-drug pattern of resistance.”