Table 2.

Extended-spectrum beta-lactamases encoding genes detected among Enterobacteriaceae in the USA dairy cattle.

ESBL Gene Type	Bacteria	State/Region	Sample	Reference
CTX-M-1	E. coli	OH, WA, SW	Fecal	[8,29,130]
	K. pneumoniae	NY	Mastitic milk	[122]
CTX-M-12	E. coli	WA	Fecal	[133]
CTX-14	E. coli	OH, WA	Fecal	[24,126]
CTX-15	E. coli	OH, WA, SW	Fecal	[8,24,126]
CTX-M-24	E. coli	WA	Fecal	[24]
CTX-M-27	E. coli	WA, SW	Fecal	[8,24]
CTX-M-32	E. coli	SW	Fecal	[8]
CTX-M-55	E. coli	WA, SW	Fecal	[8,24]
CTX-M-65	E. coli	WA, SW	Fecal	[8,24]
CTX-M-79	E. coli	OH	Fecal	[27]
CTX-M	Salmonella spp.	Not available	Feces from clinical case	[127]
	E. coli	WA	Fecal	[57]
	E. coli	TN	Fecal & BTM	[18]
	E. coli	OH	Fecal & carcass swabs	[124]
	E. coli	PA	Fecal	[129]
SHV	Salmonella spp.	Not available	Feces from clinical case	[127]
	E. coli	WA	Fecal	[57]
	K. pneumoniae	NY	Mastitic milk	[122]
TEM	E. coli	OH, WA	Fecal	[126,133]
	E. coli	PA	Fecal	[111]
	Salmonella spp.	Not available	Fecal	[127]
OXA-27	E. coli	WA	Fecal	[133]

TN: Tennessee; WA: Washington; NY: New York; OH: Ohio; PA: Pennsylvania; SW: Southwestern Region of USA.