Table 1

Sources and ST131 and blaCTX-M-15 status of 351 extended-spectrum-β-lactamase-producing Escherichia coli isolates collected in the United States in 2000 to 2009

City or center source (reference, if published)Yr of isolationPatient populationTotal no. of isolatesNo. (%) of isolates in indicated categorya,bNo. of ST131 isolates/total no. of isolates (%)a
TraitSubseta,b
M15+ST131+ST131 M15ST131 M15+ST131+ M15ST131+ M15+M15M15+
Miami, FL2009Adultsc2319 (83)7 (30)1 (4)15 (65)3 (13)4 (17)3/4 (75)4/19 (21)
Chicago, IL2007–2008Adults86 (75)5 (63)1 (13)2 (25)1 (13)4 (50)1/2 (50)4/6 (67)
Evanston, IL2007Adults2716 (59)17 (63)4 (15)6 (22)7 (26)10 (37)7/11 (64)10/16 (63)
Portland, ME2008Adult11 (100)1 (100)0 (0)0 (0)0 (0)1 (100)(none)1/1 (100)
Minneapolis, MN (Hennepin County Medical Center)2008–2009Adults3117 (55)17 (55)9 (29)5 (16)5 (16)12 (39)5/14 (36)12/17 (71)
Minneapolis, MN (Children's Hospital)2002–2009Children3312 (36)12 (36)16 (48)5 (15)5 (15)7 (21)5/21 (24)7/12 (58)
St. Paul, MN2007–2008Adults2012 (60)7 (35)5 (25)8 (40)3 (15)4 (20)3/8 (38)4/12 (33)
Winston-Salem, NC2008–2009Adults118 (73)8 (73)3 (27)0 (0)0 (0)8 (73)0 (0)8/8 (100)
Omaha, NE2005Adults41 (25)2 (50)2 (50)0 (0)1 (25)1 (25)1/3 (33)1/1 (100)
Philadelphia, PA (17)2007Adults3114 (45)15 (48)10 (32)6 (19)7 (23)8 (26)7/17 (41)8/14 (57)
Pittsburgh, PA (27)2006–2007Adults177 (41)10 (59)5 (29)2 (12)5 (29)5 (29)5/10 (50)5/7 (71)
New York City (Queens), NY (29)2004–2008Adult6337 (59)38 (60)15 (24)10 (16)11 (17)27 (43)11/26 (42)27/37 (73)
Houston, TX (30)2004–2009Adults3830 (79)10 (26)7 (18)21 (53)1 (3)9 (24)1/8 (13)9/30 (30)
San Antonio, TX (16)2000–2006Adults2011 (55)7 (35)7 (35)6 (30)2 (10)5 (25)2/9 (22)5/11 (45)
Seattle, WA2004–2007Childrend2410 (42)9 (38)13 (54)2 (8)1 (4)8 (33)1/14 (7)8/10 (80)
Total2000–2009Mixed351201 (57)165 (47)97 (28)89 (25)51 (15)114 (33)51/148 (34)114/203 (56)
  • a M15+, positive for blaCTX-M-15; M15, negative for blaCTX-M-15.

  • b ST131+, ST131 sequence type; ST131, non-ST131 sequence type.

  • c Includes 1 pediatric isolate.

  • d Includes 1 adult isolate.