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Volume 22, Number 7—July 2016
Dispatch

Extended-Spectrum Cephalosporin-Resistant Salmonella enterica serovar Heidelberg Strains, the Netherlands1

Apostolos LiakopoulosComments to Author , Yvon Geurts, Cindy M. Dierikx, Michael S.M. Brouwer, Arie Kant, Ben Wit, Raymond Heymans, Wilfrid van Pelt, and Dik J. Mevius
Author affiliations: Wageningen University, Lelystad, the Netherlands (A. Liakopoulos, Y. Geurts, C.M. Dierikx, M.S.M. Brouwer, A. Kant, D.J. Mevius); Netherlands Food and Consumer Product Safety Authority, Utrecht, the Netherlands (B. Wit, R. Heymans); National Institute for Public Health and the Environment, Bilthoven, the Netherlands (W. van Pelt); Utrecht University, Utrecht (D.J. Mevius)

Main Article

Table

Characteristics of Salmonella enterica serovar Heidelberg isolates recovered from human infections, food-producing animals, poultry meat, and other sources, the Netherlands, 1999–2013*

Source 1999–2001 2002–2004 2005–2007 2008–2010 2011–2013
Human infections
No. isolates studied 13 10 22 23 15
Resistance 
phenotypes (no.) Amp (1), 
AmpCol (1), 
AmpSmxTmpStr (1), AmpTetSmxTmpStr (1), SmxStr (1), Str (5), TetSmxTmpStr (1), WT (2) AmpSmxStr (1), AmpTetSmx (1), SmxStr (3), Str (1), TetSmxStr (1), WT (3) AmpFotTazStr (1), AmpSmxTmpNalCip (1), AmpTet (1), NalCip (2), SmxStr (1), Tet (1), TetSmxNalCip (1), WT (14) ChlCol (1), Col (10), Str (1), StrCol (5), TetCol (1), TetNalCip (1), TetSmxTmp StrCol (1), TetStr KanCol (1), TetStr SmxCol (1), WT (1) Col (1), Str (3), TetSmxStr (2), TetSmxTmp (1), WT (8)
No. ESCR isolates
0
0
1
0
0
Food-producing animals
No. isolates studied 5 16 5 7 13
Resistance 
phenotypes (no.) NalCip (1), WT (4) Amp (3), AmpSmxTmpNalCipStr (2), AmpStr (2), NalCip (5), SmxStrTmp (1), WT (3) AmpTetSmxTmpNalCip (1), WT (4) AmpCol (1), AmpFotTazNalCip (1), AmpFotTazTetSmx GenStrKanCol (1), Col (4) AmpCol (1), AmpFotTazTetSmx (1), AmpFotTazTet SmxNalCip (4), Col (2), TetSmxNalCip (2), TetSmxNal CipGenStrKan (1), WT (2)
No. ESCR isolates
0
0
0
2
5
Poultry meat
No. isolates studied 3 3 15 6 40
Resistance 
phenotypes (no.) AmpTetSmxTmpNalCipStr (1), SmxTmpStr (1), WT (1) AmpSmxStr (1), WT (2) NalCip (3), SmxCipGen (1), SmxGen (1), SmxTmpNalCip (1), TetSmxTmp (1), WT (8) AmpFotTaz (1), AmpFotTazSmxTmp ChlStrCol (1), AmpFotTazStrCol (1), Col (2), NalCipCol (1) AmpFotTazTetSmx NalCip (26), AmpFotTazTetSmx NalCipCol (1), AmpFotTazTetSmx NalCipGenStrKan (1), AmpFotTaz TetSmxNalCipStr (6), AmpFotTazTetSmx TmpNalCipChl (1), Col (2), TetSmx NalCip (1), TetSmx NalCipGenStr (1), TetSmxNalCipStr (1)
No. ESCR isolates
0
0
0
3
35
Other
No. isolates studied 0 1 0 6 4
Resistance 
phenotypes (no.) WT (1) Col (2), NalCipCol (1), Str (1), StrCol (2) AmpFotTazTetSmx NalCip (1), NalCipCol (1), Str (1), TetSmxNal CipGenStr (1)
No. ESCR isolates 0 0 0 0 1

*Amp, ampicillin; Cip, ciprofloxacin; Chl, chloramphenicol; Col, colistin; ESCR, extended-spectrum cephalosporin-resistant; Fot, cefotaxime; Gen, gentamicin; Kan, kanamycin; Nal, nalidixic acid; Smx, sulfamethoxazole; Str, streptomycin; Taz, ceftazidime; Tet, tetracycline; Tmp, trimethoprim; WT, wild type.

Main Article

1Preliminary results from this study were presented at the 12th Beta-Lactamase Meeting, June 28–July 1, 2014, Gran Canaria, Spain.

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