Table 2

Summary of E. coli isolates with blaCTX-M recovered from the fecal flora of Ohio dairy cattle including specific CTX-M gene, additional β-lactamase genes carried by the isolates, plasmid incompatibility group, and replicon type of additional plasmids

HerdNo. of isolatesCTX-M gene typeAdditional β-lactamaseCTX-M plasmidaAdditional plasmid(s)
524CTX-M-15I1F
6CTX-M-15TEM–1I1F
64CTX-M-14F
2CTX-M-14*
71CTX-M-14F
176CTX-M-1CMY–2N
1CTX-M-1NA/C
196CTX-M-1NY
6CTX-M-1TEM–1NY
7CTX–M-1N
6CTX-M-1NFIB
1CTX-M-1*
  • a *, plasmid could not be typed using our incompatibility group typing procedure.