Table 2

Occurrence of β-lactam resistance among extended-spectrum cephalosporinase-producing Salmonella serovar Stanley isolates from Danish and Thai patients during 2008

CountryOriginTotal no. of isolatesNo. (%) of isolates resistant to the indicated β-lactam at the indicated breakpoint (μg/ml)aNo. (%) of isolates with indicated β-lactam resistance gene
CAZ >2CFZ ≥4FEP ≥32FOX >8CEP >16CPD ≥8CRO ≥4IRM >1MEM >0.125blaCTX-M-15blaCMY-2blaTEM-1b
DenmarkTravelb11 (100)1 (100)01 (100)1 (100)1 (100)1 (100)0001 (100)0
DenmarkNo travel11 (100)1 (100)01 (100)1 (100)1 (100)1 (100)0001 (100)0
DenmarkUnknown22 (100)2 (100)02 (100)2 (100)2 (100)2 (100)0002 (100)0
ThailandZone 111 (100)1 (100)01 (100)1 (100)1 (100)1 (100)0001 (100)0
ThailandZone 41211 (92)12 (100)012 (100)12 (100)11 (92)11 (92)00012 (100)8 (67)
ThailandZone BKK77 (100)7 (100)1 (14)6 (86)7 (100)7 (100)7 (100)001 (14)6 (86)2 (29)
Total2423 (96)24 (100)1 (4)23 (96)24 (100)23 (96)23 (96)001 (4)23 (96)10 (42)
  • a Abbreviations: CAZ, ceftazidime; CFZ, cefazolin; FEP, cefepime; FOX, cefoxitin; CEP, cephalothin; CPD, cefpodoxime; CRO, ceftriaxone; IRM, imipenem; MEM, meropenem.

  • b Thailand.