Table 2.

Antimicrobial resistance genes found in Salmonella enterica isolated from U.S. food animals.

Antimicrobial class	Genes	References
Aminoglycosides	aacC(3′), aacC(3′)-IIa, aacC(6′), aacC2, aadA, aadA1, aadA2, aadA12, aadB, ant(3″)-Ia, aphAI, aphAI-IAB, aph(3′)-Ii-iv, aph(3′)-IIa, strA, strB	Foley and Lynne, 2008; Ramirez and Tolmasky, 2010; Chen et al., 2011; Frye et al., 2011; Glenn et al., 2011; Folster et al., 2012
β-lactams	blaCMY−2, blaPSE−1, blaTEM−1	Li et al., 2007; Foley and Lynne, 2008; Frye et al., 2011; Glenn et al., 2011;
Chloramphenicol	floR, cmlA, cat1, cat2	Foley and Lynne, 2008; Frye et al., 2011; Glenn et al., 2011
Fluoroquinolones	Mutations in Quinolone Resistance Determining Regions (QRDR) of gyrA, gyrB, parC, parE	Hopkins et al., 2005
Folate pathway inhibitors	sul1, sul2, sul3, dfr1, dfrA10, dhfrI, dhfrXII	Zou et al., 2009; Frye et al., 2011; Glenn et al., 2011
Tetracyclines	tet(A), tet(B), tet(C), tet(D), tet(G), and regulator tetR	Roberts, 2005; Foley and Lynne, 2008; Zou et al., 2009; Frye et al., 2011; Glenn et al., 2011