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High-Frequency Recovery of Quinupristin-Dalfopristin-ResistantEnterococcus faecium Isolates from the Poultry Production Environment

ABSTRACT The occurrence of resistance to the streptogramin quinupristin-dalfopristin in Enterococcus faecium isolates from chickens on the Eastern Seaboard, was evaluated. Quinupristin-dalfopristin resistance was found in 51 to 78% ofE. faecium isolates from the food production environment. The high level of resistance in this organism suggests that this reservoir of resistance may compromise the therapeutic potential of quinupristin-dalfopristin.