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. 2011 Aug 10;119(11):1622–1628. doi: 10.1289/ehp.1003350

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Percentage of E. faecalis (A) and E. faecium (B) from conventional and newly organic poultry houses expressing acquired resistance to a particular antibiotic. E. faecalis is intrinsically resistant to LIN and streptogramin A (dalfopristin) (Dina et al. 2003); E. faecium is intrinsically resistant to FLA. *p < 0.05, **p < 0.01, and ^#p < 0.001, compared with organic poultry houses.